HWH 625S Series User manual

SERVICE MANUAL
ML41240/MI91.0029
10SEP07
Single Step Touch Panel Leveling Control
BI-AXIS Hydraulic Leveling
FEATURING:
HWH CORPORATION
(On I-80, Exit 267 South)
2096 Moscow Road | Moscow, Iowa 52760
Ph: 800/321-3494 (or) 563/724-3396 | Fax: [phone]
www.hwh.com
625S SERIES HYDRAULIC LEVELING SYSTEM
HWH TOUCH PANEL-CONTROLLED
R
(Without Dump)
R
(With Dump)
(With Pilot Dump)
W
CORPORATION
HH
R
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
EXTEND
RETRACT
STORE
AUTO
LEVEL
AUTO
NOT IN
CAUTION!
BRAKE
TRAVEL
EMERGENCY
STOP MODE
PARK/
EXCESS
R
SLOPE
MANUAL
RETRACT
EXTEND
Straight-Acting Jacks
(With Remote Rocker Switches)

SECTION 1
MI91.1132
01NOV11
SECTION
2
DIAGRAMS
SECTION
1
AND TROUBLE
SHOOTING
GUIDE
2 PART FOLDER
HOW TO USE MANUAL
Before beginning your repair, it is IMPORTANT to read the CAUTIONS and NOTES AND CHECKS in the first section, TROUBLE
SHOOTING GUIDE. In many cases this will save time and mistakes when trouble shooting a system.
This Repair Manual is offered as a guide only. It is impossible to anticipate every problem or combination of problems. For
any problems encountered that are not addressed in this manual, contact HWH Corporation for assistance. (800-321-3494)
PROCEED WITH SYSTEM OPERATION
AND
GLOSSARY
OPERATION
SYSTEM
This manual is written in two sections. Section 1 is System Operation and Trouble Shooting Steps. Section 2 is the
Diagrams and Parts Glossary. Begin diagnosis of the system with Section 1. This will give the correct operation and function
of the system. The Trouble Shooting Steps are written in order of operation. The Trouble Shooting Steps should be followed
in order to avoid improper diagnosis of the system. Section 2 contains diagrams and a parts glossary. Refer to diagrams as
directed in the Trouble Shooting Steps. The parts glossary explains the function of individual parts.
IMPORTANT: Plumbing and wiring diagrams are generic in nature. Refer to specific owner’s manuals when available
or contact HWH Corporation for specific diagrams when necessary.

TROUBLE SHOOTING
MI91.1142
25APR11
WARNING!
BLOCK FRAME AND TIRES SECURELY BEFORE CRAWLING UNDER VEHICLE. DO NOT USE THE LEVELING
JACKS OR AIR SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE
MAY DROP AND OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.
WHEN ROUTING OR REROUTING HYDRAULIC HOSES AND WIRES, BE SURE THEY ARE NOT EXPOSED TO ENGINE
EXHAUST OR ANY HIGH TEMPERATURE COMPONENTS OF THE VEHICLE.
NEVER PLACE HAND OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY CUT AND
PENETRATE THE SKIN CAUSING INJURY OR DEATH.
SAFETY CLASSES ARE TO BE WORN TO PROTECT EYES FROM DIRT, METAL CHIPS, OIL LEAKS, ECT. FOLLOW
ALL OTHER SHOP SAFETY PRACTICES.
NOTES AND CHECKS
Read and check before proceeding with Trouble Shooting Steps.
NOTE: HWH CORPORATION ASSUMES NO LIABILITY
FOR DAMAGES OR INJURIES RESULTING FROM THE
INSTALLATION OR REPAIR OF THIS PRODUCT.
1. If the jacks cannot be retracted, see TROUBLE SHOOTING
PART 15 Step 2 for temporary measures. Make sure the
manual retract valves are closed before trouble shooting.
2. The Trouble Shooting Guide must be followed in order.
Problems checked for in one step are assumed correct and
may not be checked again in following steps.
retracted position. If the vehicle is equipped with HWH room
4. Most coaches have more than one battery; one for the engine
and the other(s) for the coach. The engine battery supplies
power for the control box and hydraulic pump. Batteries under
no load should read 12.6 volts. Batteries must maintain good
6. Do not replace the control box unless the Repair Steps say
to replace it. Otherwise the malfunctions may damage the
new control box.
5. Proper grounding of all components is critical. See the
electrical circuit for specific grounds required. Faulty grounds,
especially for the control box, solenoid manifold or the pump
assembly, may cause control box component damage and /or
improper or erratic operation.
This manual is intended for use by experienced mechanics
with knowledge of hydraulic and automotive electrical
systems. People with little or no experience with HWH
leveling systems should contact HWH technical service
(800-321-3494) before beginning. Special attention should
be given to all cautions, wiring, and hydraulic diagrams.
Special note: When installing a new control box, make
sure the box is properly grounded before applying power
to the system.
Suggested tools for trouble shooting the HWH leveling systems:
JUMPER WIRES (UP TO 10 GAUGE)
PRESSURE GAUGE (3500 PSI MIN.)
MULTI-METER
12 VOLT TEST LIGHT
PROCEED WITH THE TROUBLE
SHOOTING STEPS ON THE
FOLLOWING PAGE
3. Check that the oil reservoir is full with the jacks in the fully
voltage under load. Batteries must be in good condition with
no weak cells. An alternator, converter or battery charger will
not supply enough power for the system to operate properly.
existing hose end, tighten the hose end to snug plus 1/4
tighten the hose end 1/3 turn (2 FLATS). If tightening an
make the hose end snug (finger tight) on the fitting, then
Tightening of hose ends: If tightening a new hose end,
turn (1 FLAT).
extensions, refer to the HWH Owners Manual for proper
position of the room when checking the oil level.

MI91.1155
10AUG07
"EMERGENCY STOP" BUTTON:
any leveling system operation.
"AUTO LEVEL" BUTTON:
"AUTO STORE" BUTTON:
four jacks at the same time. WARNING LIGHTS:
"EXCESS SLOPE" LIGHT:
the leveling system cannot level the vehicle.
"NOT IN PARK/BRAKE" LIGHT:
when the hand/auto brake is not set and the "AUTO LEVEL"
"TRAVEL MODE" LIGHT:
when the ignition is on, when the jacks are retracted and
there are no red WARNING lights on.
MASTER "JACKS DOWN" WARNING LIGHT:
light mounted in the dash separate from the touch panel.
and the ignition is "ON".
BUZZER:
CONTROL FUNCTIONS
INDICATOR LIGHTS (CONTINUED)
CONTROL BUTTONS
Push this button to stop
Push this button to retract all
This indicator will light when
This indicator will light
This indicator light will be on
This is a
This is a jacks down warning.
EXTEND BUTTONS (UP ARROWS):
RETRACT BUTTONS (DOWN ARROWS):
LEVELING LIGHTS:
These buttons will
extend their respective jack pairs to lift the vehicle.
These buttons
will retract their respective jack pairs to lower the vehicle.
The four yellow indicating lights are
level sensing indicators. When a yellow light is on, it
indicates that its side, end, or corner of the vehicle is low.
No more than two lights should be on at the same time.Push this button any time to
The four red lights surrounding the
yellow level indicators are jacks down WARNING lights.
They are functional only when the ignition is in the "ON"
extended 1/4 to 1/2 inch.
start the automatic leveling function.
It will sound if the master "JACKS DOWN"
CONTROL IDENTIFICATION
625S SERIES LEVELING SYSTEM
COMPUTER-CONTROL
or "ACC" position, the system is on, and the jacks are
It will be on when any one or more jacks are extended
button is being pushed.
RETRACT
EXTEND
HWH COMPUTERIZED LEVELING
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
"EXCESS SLOPE"
Indicator light
"AUTO LEVEL"
AUTO LEVEL/STORE
CANCEL Button
"NOT IN PARK"
Indicator light
Indicator light
"TRAVEL MODE"
Indicator light
Indicator light
AUTO LEVEL
"AUTO STORE"
Button
STORE
Button
RAISE LEFT SIDE
Manual button
LOWER LEFT SIDE
Manual button
EMERGENCY
STORE
AUTO
STOP
AUTO
LEVEL
TRAVEL
BRAKE
MODE
CAUTION!
EXCESS
SLOPE
NOT IN
PARK/
R
LOWER FRONT
Manual button
RAISE FRONT
Manual button
JACK DOWN
Indicator light
RAISE RIGHT SIDE
Manual button
LOWER RIGHT SIDE
Manual button
LEVEL SENSING
Indicator light
(4) yellow
RAISE REAR
Manual button
LOWER REAR
Manual button
MANUAL
RETRACT
EXTEND (4) red
INDICATOR LIGHTS
AUTO LEVEL INDICATOR LIGHT: This light will flash
during the automatic leveling function.
STORE INDICATOR LIGHT: This light will flash during
the automatic store function.
When all four yellow LEVEL lights are out, the vehicle is
level. SEE OPERATOR’S PROCEDURES - AUTOMATIC
MANUAL
DUMP
"MANUAL DUMP"
Button
warning light is on.
"MANUAL DUMP" BUTTON: This is a manual button for
dumping air from the vehicle suspension.
HYDRAULIC LEVELING FOR DETAILED EXPLANATION.

MI91.116
5
01SEP1
5
SYSTEM OPERATION
The 625 Single Step leveling system is a computer controlled, BI-AXIS push button system. This system has automatic or
optional manual control. This system will always extend two (2) jacks at the same time in the automatic or manual mode, both
front jacks, the left front and left rear jacks, the right front and right rear jacks or both rear jacks. In the manual mode, the jacks
are controlled by the UP and DOWN arrow buttons on the right hand side of the touch panel. The UP arrows extend jack pairs
and the DOWN arrows retract jack pairs.
If the vehicle is equipped with an air suspension, the air must be exhausted from the suspension before leveling the vehicle. If
the air is not exhausted, the suspension height control valves will interfere with the leveling procedure. There are two types of
air dump systems that HWH controls. One system uses air solenoid valves supplied by HWH. The second system is supplied
by the chassis manufacturer. This is a pilot air dump system. In the automatic mode, the air is dumped automatically before
the leveling process is started. For manual leveling, the HWH touch panel has a "DUMP" button. The "DUMP" button will work
if the ignition is on and the park brake is set. If the vehicle uses the HWH air dump valves, the "DUMP" button must be pushed
and held until all of the air is exhausted from the vehicle suspension system. The engine must be off. If a pilot air dump syste
m
is used, the engine may be on or off. The "DUMP" button can be pushed and released. The pilot air dump system will return t
o
the travel position if the ignition is on and the "STORE" button is pushed or the park brake is released.
AUTOMATIC OPERATION
Push the "AUTO LEVEL" button one time. The AUTO LEVEL light will flash.
On the right hand side of the touch panel there are four (4) red and four (4) yellow indicator lights. The four red indicator lights
are JACK DOWN warning lights. There is one light for each jack. These warning lights come on when their respective jacks
are extended about 1/4 to 1/2 inch. The four yellow indicator lights are level indicators, front, left side, right side and rear. A lit
yellow level light indicates that a side, end or corner is low. When all four yellow level lights are out, the vehicle is level within
the tolerance of the level sensing unit.
The computer will extend jack pairs according to the level lights starting with a lit side light. When all four level lights are out,
the computer will extend any jacks not used for leveling to stabilize the vehicle. The computer looks for a jack pressure switch
from each jack to know all jacks are on the ground. NOTE: Both front solenoid valves will come on during the stabilize
procedure when either front jack pressure switch is not on. When both front jack pressure switches are on, both fron
t
solenoid valves will be off.
There are two parts to leveling a vehicle. First the vehicle is leveled. The jacks are used to turn all the yellow level indicators
off. The second part of leveling is to stabilize the vehicle. This is accomplished by extending any jacks not used for leveling to
the ground and lifting the vehicle between 1/4 to 3/4 inch.
NOTE: Releasing the park brake to return the suspension to travel mode (vehicle to ride height) is not recommended
for normal operation. This is a fail safe if the "STORE" button is not used to retract the jacks.
If applicable, the air will dump for thirty (30) seconds before the leveling procedure starts.
The ignition must be in the "ON" or "ACC." position and the park brake must be set to use the system. The "TRAVEL MODE"
light will be on and one or two yellow level indicator lights may be on anytime the ignition is in the "ON" or "ACC" position. The
"NOT IN PARK/ BRAKE" indicator light will come on while the "AUTO LEVEL" button is being pushed if the park brake signal is
not present. The system will not function.
NOTE: If the vehicle is equipped with remote leveling system rocker switches, pushing a rocker switch to "LEVEL"
will start the automatic leveling process. The rocker switch light will flash.
PUMP PROTECTION:
pump off and lock the system if a total of 3 minutes is reached. Example: The pump runs for 1 minute and is off for 20 second
s.
The pump must run 2 minutes and 20 seconds more without interruption to turn the pump off. Any "OFF" time adds more run
time for the pump. This includes operation of HWH rooms. Turn the ignition off, push the "EMERGENCY STOP" button or
release the park brake to "UNLOCK" the system.
CAUTION: IF THE VEHICLE IS EQUIPPED WITH A PILOT AIR DUMP FOR THE SUSPENSION AND A BUTTON
IS PUSHED TO STOP THE AUTOMATIC LEVELING PROCESS, THE SUSPENSION WILL CONTINUE TO DUMP AIR.
PUSHING THE "STORE" BUTTON OR RELEASING THE PARK BRAKE AFTER THE LEVELING PROCESS IS STOPPED
WILL RETURN THE PILOT AIR DUMP TO THE TRAVEL POSITION.
The HWH system has pump protection built into the control box. An up and down timer will turn the
Any time the ignition is on, the control box will turn the master relay on. The
park brake does not have to be set for the master relay to be on.

MI91.1185
17MAY10
625S TROUBLE SHOOTING GUIDE
On the right hand side of the touch panel there are four (4) red and four (4) yellow indicator lights. The four red indicator lights
are JACK DOWN warning lights. There is one light for each jack. These warning lights come on when their respective jacks
are extended about 1/4 to 1/2 inch. The four yellow indicator lights are level indicators, front, left side, right side and rear. A lit
yellow level light indicates that a side, end or corner is low. When all four yellow level lights are out, the vehicle is level within
the tolerance of the level sensing unit.
Use the UP ARROW (Extend jack pairs) and DOWN ARROW (Retract jack pairs) buttons to extend jack pairs as
needed to level and stabilize the vehicle. Side level lights should be turned off before turning off front or rear level lights.
STORE MODE
The touch panel has a "STORE" button and light. The ignition must be in the "ON" or "ACC." position. The STORE light will
come on when the "STORE" button is pushed. The STORE light will go out six (6) minutes after the last of the four individual
red WARNING lights go out. If the vehicle is equipped with an air suspension, the leveling system will return to the travel mode
The "STORE" button should always be used to retract the jacks. This allows the system to store any jack that extends due to
The ignition must be in the "ON" or "ACC." position and the park brake must be set to use the system. The "NOT IN PARK/
BRAKE" indicator light will come on while pushing an UP or DOWN arrow manual button if the park brake signal is not present.
MANUAL OPERATION
If applicable, use the DUMP button to dump the air before extending jacks. Air should be completely exhausted from the
The system will not function.
thermal expansion of the hydraulic fluid while traveling. When traveling, if a jack extends enough to allow a jack warning switch
to turn on, the processor will turn the appropriate solenoid valve on so the jack can retract. The master warning light and buzzer
will NOT come on at this time. If thirty (30) seconds after the solenoid valve is turned on the warning switch is still on, the
processor will turn the master warning light, the buzzer and the appropriate red WARNING light on the touch panel on.
IMPORTANT: When testing a leveling system, all four sets of UP and DOWN arrow buttons should be used to make
sure the complete system operates correctly, including the red WARNING lights and the yellow LEVEL lights. If the
system will not work in the manual mode it is very unlikely the system will function properly in the automatic mode.
vehicle suspension before starting a leveling process.
when the "STORE" button is pushed.
Pushing the "EMERGENCY STOP", the "AUTO LEVEL" or "STORE" button after starting the automatic store procedure will
halt the automatic store procedure.
NOTE: If the vehicle is equipped with remote leveling system rocker switches, pushing the rocker switch to STORE
will start the automatic store procedure. Pushing the rocker switch either direction will halt the automatic store
procedure.
WARNING: IF THE VEHICLE IS EQUIPPED WITH A PILOT AIR DUMP SYSTEM, THE SUSPENSION WILL DUMP
AIR AND START TO DROP AS SOON AS AN AUTOMATIC LEVEL BUTTON OR ROCKER SWITCH IS PUSHED.
ALTHOUGH THE AUTOMATIC LEVELING PROCEDURE WILL HALT WHEN AN "EMERGENCY STOP", "STORE",
"AUTO LEVEL" OR ROCKER SWITCH IS PUSHED, THE VEHICLE SUSPENSION WILL CONTINUE TO DROP.
Excess slope is when one or two jacks extend as far as they can without turning a yellow level light out.
The pump will go to relief and trip a 3000# pressure switch on the leveling manifold. The "EXCESS SLOPE" light will come on.
Jacks that have not been extended will not extend when the "EXCESS SLOPE" light is on. The "EXCESS SLOPE" light will be
on whenever the ignition is on until the park brake is released (with the ignition on) or the jacks are completely retracted with the
The "EMERGENCY STOP" button will stop the automatic leveling process any time. After pushing the "AUTO LEVEL" button
to start the automatic leveling process, pushing the "AUTO LEVEL" button again or pushing the "STORE" button will stop the
automatic leveling process. If the vehicle is equipped with remote leveling system rocker switches, pushing the rocker switch
to "LEVEL" or "STORE" will stop the automatic leveling process.
"STORE" button.
EXCESS SLOPE:
AUTOMATIC OPERATIONS CONTINUED. . .

MI91.1195
03OCT11
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
NOTE: The following diagnostic functions are written in order of operation and should be checked in this order.
Failure to do so may cause improper diagnoses of the problem(s) and increase the time needed to repair the system.
PART 1. WITH THE IGNITION OFF THE HWH TOUCH PANEL SHOULD HAVE NO LIGHTS ON
AND SHOULD NOT FUNCTION.
1. harness is connected to a constant power source and should be moved to the "ACC."
PART 2. BE ON. THE MASTER "JACKS DOWN" LIGHT AND BUZZER SHOULD NOT BE ON. ONE
warning light and buzzer are on and none of the jacks are extended.
in the jack may be bad. If a new switch does not fix the problem, contact HWH
customer service. If the LED stays on with the warning switch unplugged, unplug
the 12 pin gray connector from the back of the control box. If the LED remains on,
jack, 22 is for the right front jack, 23 is for the right rear jack and 24 is for the left rear jack. If no warning
lit LED. If the LEDs go out, the problem is the warning switch. NOTE: The magnet
If the touch panel has lights on or will function, the red 6120 wire in the touch panel
side of the ignition switch. SEE: MP85.091C or MP85.056J
SEE: MP85.185J
SEE: MP85.091C
replace the control box. If the LED goes out, the warning switch wire(s) for the LED’s
that are on are shorted to ground.
switch LEDs are on, replace the control box.
WITH THE IGNITION ON, THE "TRAVEL MODE" LIGHT ON THE TOUCH PANEL SHOULD
OR TWO YELLOW LEVEL INDICATOR LIGHTS MAY BE ON IF THE PARK BRAKE IS SET, MP85.091C
BUT NOT OPPOSING LEVEL INDICATOR LIGHTS.
a. If the red LED 16 is on but the yellow LED is off, replace the control box.
1. The pump starts to run when the ignition is turned on. Check LED’s 15 (yellow) and 16 (red).
b. If the yellow LED 15 and red LED 16 are on, unplug the touch panel. If the pump
stops, replace the touch panel. If the pump continues to run, replace the control box.
c. If LED’s 15 and 16 are off, replace the pump relay. The pump relay contacts are stuck.
SEE: MP85.184J
2. The "TRAVEL MODE" light is not on. The ignition is on, the master "JACKS DOWN"
a. Check the four yellow LEDs for the warning switch inputs in the control box. Number 21 is for the left front
b. If a warning switch LED is on, unplug the warning switch for the jacks that have a
TOUCH PANEL
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZED LEVELING
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
625 SERIES SINGLE STEP LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
7699 7699
PARK BRAKE
9300
LEFT REAR
9301
6231
6230
SWITCH
WARNING
4200
PRESSURE
SWITCH
4000
B A
SWITCH
6235
GROUND
TO HWH
CONNECTION
PILOT AIR DUMP
STUD
DIODE
7699
6231
6230
9301
9300
CBA
PARK BRAKE
LIGHT
9001 - TO
9000
6111
LIGHT
DIODE
LEFT FRONT
WARNING
MASTER
BRAKE
SWITCH
TO ACCESSORY
TO IGNITION
_
+
6111
BUZZER
6110
1000
FUSE
5AMP
1200
B A
6235
6120
AUTO
STORE
TRAVEL
MODE
CAUTION!
EMERGENCY
STOP
RETRACT
WARNING
PRESSURE
SWITCH
LEVEL
AUTO
EXCESS
SLOPE
PARK/
NOTIN
R
EXTEND
8 PIN
BLACK
BLACK
12 PIN
WARNING
3200
SWITCH
PRESSURE
6235
SWITCH
3000
B A
7699
9000 4 PIN
GRAY
GREEN
12 PIN
12 PIN
BROWN
08AUG07
MP85.091C
RIGHT REAR
GRAY
12 PIN
LEVELING SYSTEM - LEVELING
SEE ELECTRICAL CONNECTION
SWITCH
6230 - 6231
MASTER RELAYS
MANIFOLD - PUMP AND
DIAGRAM - 625 SERIES
RETRACT
6235
9300
9301
2000
2200
B A
WARNING
EXTEND
MANUAL
SWITCH
PRESSURE
CONNECTION
PILOT DUMP
RIGHT FRONT
BY OEM
LIGHT
MASTER
LEFT FRONT
WARNING
PARK BRAKE
SWITCH
LEFT REAR
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
MP85.091C
WARNING
SWITCH
PARK BRAKE
9001 - TO
6230
9301
9300
6231
PILOT AIR DUMP
SWITCH
4000
PRESSURE
CONNECTION
B
4200
A
9300
9301
SWITCH
6235
WARNING
6230
6231
7699
DIODE
GROUND
TO HWH
STUD
BA
C
7699
7699
9000
LIGHT
7699
9000
6235
3000
B
3200
A
SWITCH
PRESSURE
08AUG07
MP85.091C
RIGHT REAR
BLACK
12 PIN
8 PIN
BLACK
4 PIN
GRAY
GREEN
12 PIN
BROWN
12 PIN
GRAY
12 PIN
625 SERIES SINGLE STEP LEVELING SYSTEM
SWITCH
6230 - 6231
WARNING
LEVELING SYSTEM - LEVELING
SEE ELECTRICAL CONNECTION
MASTER RELAYS
MANIFOLD - PUMP AND
DIAGRAM - 625 SERIES
TO ACCESSORY
TO IGNITION
6110
1000
6111
DIODE
B
1200
FUSE
5AMP
A
BUZZER
6111
+
_
6235
SWITCH
PRESSURE
SWITCH
WARNING
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
6120
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
CAUTION!
EXTEND
RETRACT
TOUCH PANEL
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
R
BRAKE
PARK/
TRAVEL
MODE
STOP
EMERGENCY
NOTIN
AUTO
STORE
LEVEL
AUTO EXTEND
RETRACT
MANUAL
6235
9300
9301
2000
B A
2200
CONNECTION
PILOT DUMP
RIGHT FRONT
BY OEM
SWITCH
PRESSURE
ELECTRICAL CONNECTION DIAGRAM
check LED’s 36, 37 and 39. LED 39 should be flashing.
flashes, replace the touch panel. If the touch panel remains off with no LED’s lit,
Push the "AUTO LEVEL" button. The AUTO LEVEL light should flash. If the light
DOWN" warning light and buzzer are NOT on and none of the jacks are extended.
3. The "TRAVEL MODE" light is not on. The ignition is on, the master "JACKS
SEE: MP85.185J
CIRCUIT BOARD CONNECTOR AND PIN LOCATIONS
CR8
CN1
ELECTRICAL CONNECTION DIAGRAM
12
LD23 Y
LD28
LD27
LD26
LD25
LD24
R
R
R
R
Y
LD22
LD21 Y
Y
CR6
CR2
CN6
CR5
CR1
GND
PF1
CR7
1
CR10 CR3
(SHIELD)
LD38LD36
R
LD39
RLD37
R
CN9
T2
LD29
R
LD31 LD30
Y G
LD35
LD33 LD32
R G
LD34
RR
R
8
F10
GND
IGN CL CH
PF4
PF3
CN8
08AUG07
MP85.185J
CR9
CR4 CR11
1
12
IGNOUT
GND AUX
1
CN7
12
CN3
1
+12
MP85.185J
SEE: MP85.184J
OR
MP85.056J
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
OR CONNECTION CABLE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
CORRESPONDING RELAY ON.
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
4-PIN CONNECTOR.
IF A YELLOW LED IS NOT LIT, THERE IS A
IF A YELLOW LED IS LIT AND THE
BOX CONNECTION INFORMATION.
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
+12V
REAR
FRONT
GROUND
RIGHT SIDE
LEFT SIDE
28
39 36 37 38
SENSING UNIT
31
PIN 1
FUSE
LED
2
DUMP
4
F1
12
11
F2
REAR RIGHT REAR LEFT
75
32
F4 F9
21
26
27
25
24
23
22 313029
15
16
F7 MASTER
RELAY RELAY
F6
14
13
19 6
F8 PUMP
TRAVEL
17
F3
18
8
353433
PF3
F10
PF4
20
RIGHT
CRX2
FRONT
FRONT LEFT
CRX1
RIGHT REAR PRESS SW
MASTER WARNING
LINK LIGHT
ACCESSORY OUT FOR
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
JACK INTERRUPT
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
NOT USED
NOT USED
LEFT REAR PRESS SW
38-RED
39-RED
33-GREEN
31-GREEN
30-YELLOW
37-RED
36-RED
35-RED
34-RED
32-RED
29-RED
28-RED
13AUG07
MP85.184J
PF4
F10 - 10 AMP
RIGHT FRONT PRESS SW
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
CRX 2
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
PUMP COIL
MASTER RELAY OUTPUT
MASTER RELAY COIL
DUMP OUTPUT
DUMP COIL
LEFT FRONT OUTPUT
LEFT FRONT COIL
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
24-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
27-RED
26-RED
25-RED
18-RED
CRX 1
15-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
16-RED
14-RED
12-RED
8-RED
6-RED
4-RED LEFT REAR COIL
RIGHT REAR OUTPUT
RIGHT REAR COIL
RELAY DESCRIPTION
3-YELLOW
1-YELLOW
2-RED
LED
F9 - 5 AMP
F8 - 5 AMP
F7 - 5 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
F1 - 15 AMP
FUSE
MP85.184J
NOTE: Make sure the white wires of the harness and warning switch are in the "A"
pins of the Packard connectors. The black wires must be in the "B" pins of
the connectors.
box on the 6120 wire should be above 12 volts.
connector or +12 ignition power on wire 6120, PIN 6 of CN8. Voltage to the control
+12 is not present, the problem is either the ground for the control box in the 4 pin gray
between T2 and PIN 6 (ign) of CN8. If voltage is present, replace the control box. If
of CN8. If +12 is present, replace the control box. If +12 is not present, check for +12
the control box. If F10 is OK, check for +12 volts between PIN 4 (gnd) and PIN 6 (ign)
the touch panel harness, it may be shorted to ground. If the 6800 wire is ok, replace
Check fuse F10. If F10 is blown, check the 6800 wire ina. LED’s 36, 37 and 39 are off.
SEE: MP85.185J

MI91.1205
26OCT07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
MP85.2930
PART 2. Continued. . .
b. LED’s 36 and 37 are on, LED 39 is off. Check for +12 volts between PIN 4
(ground-white wire) and PIN 5 (+12-red wire) at the touch panel.
c. LED 37 is on. LED 36 is off. LED 39 may or may not be on, blinking.
If there is no voltage between PIN 4 and PIN 5 at the touch panel, check for
Check voltage
Less than 11.3 volts at the touch panel may indicate that there is a low voltage
situation for the leveling system but the system may still functions. If there is less
than 11 volts at the touch panel, the voltage problem should be taken care of before
proceeding. If there is a voltage problem, check the voltage between PIN 4 (gnd)
and PIN 6 (ign) of CN8 at the control box and PIN 4 (gnd) and PIN 3 (ign out) of CN8.
If there is more than 1(one) volt difference, replace the control box. If voltage
between PIN 4 and PIN 6 is low, the problem is the ground from the white wire in the
4 pin gray connector or the voltage on the red 6120 wire in the CN8 connector for PIN 6.
voltage between pins 3 (ign out) and 4 (gnd) of CN8 at the control box. If there is
good voltage, the problem is the touch panel cable or it’s connections. If there is no
voltage between pins 3 and 4, check for voltage on the legs of poly fuse PF3. If there
is no voltage on either leg, replace the control box. If there is voltage on one leg of
the poly fuse, unplug the touch panel cable at the touch panel and recheck pins 3
and 4. (It will take about 30 seconds for the poly fuse to reset). If voltage is now
present, replace the touch panel. If there is still no voltage, remove the 6800 wire from
the CN8 connector and recheck pins 3 and 4. If there is voltage now, the 6800 wire is
shorted to ground. If voltage is still not present, replace the control box.
between PIN 4 (gnd) and PIN 6 (ign) of CN8 at the control box. If there is less than 12
volts present, check the ground and ignition supply connections for any problems including
corrosion. If there is good voltage between pins 4 and 6, replace the control box.
If the LED is not on, the 7699 wire going to the master warning light and buzzer
SEE: MP85.091C or MP85.304R or MP85.056J
a. Check red LED 32. If the LED is on, replace the control box.
is shorted to ground.
4. The "TRAVEL MODE" light is on AND the master "JACKS DOWN" warning light and buzzer are on.
SEE: MP85.185J
SEE: MP85.2930 & MP85.185J
RETRACT
EXTEND
HWH COMPUTERIZED LEVELING
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
TOUCH PANEL CONNECTIONS
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
6 PIN UML CONNECTOR
5 PIN MTA CONNECTOR
WHITE
COLOR
WIRE
GREEN
YELLOW
LINK LIGHT
3
2
5
3
4
6
5
4
1
RED
PIN #
2
1
NO CONNECTION
ACCESSORY
NO CONNECTION
LEVEL
STORE
LED
6230
6800
NUMBER
WIRE
MANUAL
STOP
EMERGENCY
PIN 1
STORE
AUTO
AUTO
LEVEL
MODE
CAUTION!
SLOPE
NOT IN
PARK/
TRAVEL
BRAKE
DUMP
EXCESS
R
SW GND FROM TOUCH PANEL FOR LEVEL LED
SW +12V FROM SW TO TOUCH PANEL FOR LEVEL
SW +12V FROM SW TO TOUCH PANEL FOR STORE
SWITCHED BATTERY FROM CONTROL BOX
CAN SHIELD
+12V ACC FROM TOUCH PANEL
GROUND FROM CONTROL BOX
WIRE DESCRIPTION AND FUNCTION
CAN HIGH
CAN LOW
PIN 4 PIN 1
MP85.2930
22FEB05
MANUAL
RETRACT
EXTEND
SEE: MP85.2930 & MP85.185J
SEE: MP85.2930 & MP85.185J & MP85.102K
SEE: MP85.185J
MASTER
WARNING
LEFT FRONT
LIGHT
SWITCH
PARK BRAKE
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
MP85.091C
9001 - TO
PARK BRAKE
7699
DIODE
7699
7699
9000
LIGHT 9000
7699 12 PIN
BLACK
BLACK
8 PIN
GRAY
4 PIN
BROWN
12 PIN
12 PIN
GREEN
12 PIN
GRAY
WARNING
DIAGRAM - 625 SERIES
MANIFOLD - PUMP AND
MASTER RELAYS
6230 - 6231
SWITCH
SEE ELECTRICAL CONNECTION
LEVELING SYSTEM - LEVELING
ELECTRICAL CONNECTION DIAGRAM
625 SERIES SINGLE STEP LEVELING SYSTEM
TO IGNITION
TO ACCESSORY
1000
6110
6111
DIODE
AB
1200
5AMP
FUSE
BUZZER
6111
+
_
6235
SWITCH
PRESSURE
WARNING
SWITCH
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
6120
CAUTION!
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
EXTEND
RETRACT
HWH COMPUTERIZED LEVELING
TOUCH PANEL
R
NOTIN
PARK/
SLOPE
EXCESS
AUTO
LEVEL
STOP
EMERGENCY MODE
TRAVEL
STORE
AUTO
BRAKE
MANUAL
EXTEND
RETRACT
6235
2000
9301
9300
AB
2200
RIGHT FRONT
PILOT DUMP
CONNECTION
BY OEM
PRESSURE
SWITCH
LEVELING MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
PUMP AND MASTER RELAYS
LEVELING MANIFOLD
PUMP
MOTOR
MOTOR
#7
#6
PUMP
RELAY
#4
#5
TO PUMP
#9
+
8600
HWH GROUND
MANIFOLD
STUD
TO HWH GROUND STUD - 6240
TO 3000 LB PRESSURE SWITCH - 8100
TO 50 LB PRESSURE SWITCH - 8101
1400
4400
6240
6240
A
B
A
B
2400
7600
7601
BA
A
B
3400
LEVELING
P.E.D P.E.D P.E.D P.E.D
RF
RR
LR
LF
HARNESS
TOUCH PANEL
GROUND STUD
6230 - TO HWH
BLACK
8 PIN
MASTER
RELAY
#3
#1
BATTERY
#2
#8
8500
TO HOUSE
6800
14JUN05
MP85.102K
BROWN
GRAY
4 PIN
12 PIN
MP85.102K
suspension or PART 4 if not equipped with an air suspension. Opposing yellow lights
a. If the rest of PART 2 is OK, proceed to PART 3 if the vehicle is equipped with an air
are covered in PART 16.
5. Opposing yellow level indicator light are on.
PF4
MP85.185J
LD26
LD27
LD28
LD39
RR
LD36
T2
R
R
R
CN1
MP85.185J
08AUG07
LD38
RR
LD37
G
LD33
ELECTRICAL CONNECTION DIAGRAM
CIRCUIT BOARD CONNECTOR AND PIN LOCATIONS
PF1
CR2
CN6
CR5
CR1
GND
1
12
LD21
LD22
LD24
LD25
LD23
CR6 CR7
R
LD29
CN9
Y
Y
Y
R
YR
LD32
GY
LD30 LD31
CR8 CR9
CR3
CR10 CR4
GND
GND
(SHIELD)
R
R
LD34 LD35
AUX
1
CHCL
IGN
F10
8
IGNOUT
1
12
CN8
PF3
CN7
+12
CR11
12 1
CN3
from the 6120 wire in the 8 PIN black connector CN8.
be off when checking resistance on these wires.
box but could be the touch panel. If the resistance is not correct, unplug the harness
vehicle or the control box is not wired to the ignition circuit, remove power
link light at the touch panel. If it is blinking, the touch panel is probably the problem.
If the link light is not blinking check the resistance between PIN 1 (yellow wire) and
from the touch panel. Check the resistance between the yellow and green wire in the
the touch panel. If the resistance between the harness pins is wrong, unplug the
touch panel cable (CN8-8 pin black connector) at the control box. Check the
If there is good voltage between PIN 4 and PIN 5 at the touch panel,
PIN 2 (green wire) at the touch panel with the harness plugged in. The ignition must
of resistance ± 7.5 ohms. If the resistance is OK, the problem is probably the control
harness plug and between PIN 1 and PIN 2 of the panel plug. The resistance should
be 120 ohms ± 15 ohms. If the resistance between the panel pins is wrong, replace
resistance between PIN 7 (CL) and PIN 8 (CH) of CN8 in the control box. If the
resistance is OK (120 ohms ± 15 ohms), replace the touch panel cable. If not
There should be 60 ohms
NOTE: If the vehicle is a towable
check the
replace the control box.

MI91.1215
14AUG07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
air dump valves or one or more of the air dump valves may be bad.
PART 7. If F6 is blown, there may be a short on the 9300 wire going to the HWH
wires or their connection to the master relay. If the pump does not run, proceed to
replace the control box. If power is not present, there is a problem with these
wires in the four pin connector on the back of the control box. If power is present,
any manual UP arrow button. If the pump runs, check for power on the two black
box. If LED 11 is on but LED 12 is off, check fuse F6. If F6 is not blown, push
should be off. If LEDs 11and/or 17 are not on, or LED 18 is on, replace the control
11 and 17 (YELLOW) along with LED 12 (RED) should be on. LED 18 (RED)
dump valve(s). Check that the exhaust ports for the air dump valves are not plugged.
wire or their pin connections. If power is present at the connectors, replace the air
air dump valves. If there is no power, the problem is the 9300 wire, the white ground
between the 9300 (BLACK) wire and the white wire in the Packard connector at the
9300 wire. If there is power on the 9300 wire at the control box, check for power
control box. If not, there is a problem with the connector, pin connections or the
be power on the 9300 wire on pin 11 in the 12 pin brown connector on the back of
valve for each height control valve on the suspension. Air will only be exhausted while
PANEL IS PUSHED. THE IGNITION IS ON AND THE PARK BRAKE IS SET.
FROM THE SUSPENSION AIR BAGS WHEN THE "DUMP" BUTTON ON THE TOUCH
the "DUMP" button is being pushed.
b. LEDs 11 and 17 (YELLOW) and LED 12 (RED) are on. LED 18 is off. There should
a. Check LEDs 11, 12, 17 and 18 while the "DUMP" button is being pushed. LEDs
PART 3. FOR VEHICLES EQUIPPED WITH AN AIR SUSPENSION. THE AIR WILL NOT EXHAUST
2. For vehicles equipped with the HWH air dump valves. There is normally one air dump
1. The "NOT IN PARK/BRAKE" light on the touch panel
comes on while the "DUMP" button is being pushed.
a. Check that the park brake is set.
b. Check LED 35 on the board in the control box. SEE: MP85.185J
SEE: MP85.185J & MP85.186E
SEE: MP85.184J & MP85.091C
If LED 35 is off, check for a ground on the 9000 wire on pin 7 of the 12 pin black
connector on the back of the control box. If there is a ground on wire 9000, unplug
the 12 pin black connector and ground pin 7 in the box receptacle. If LED 35 does not
come on, replace the control box. If LED 35 does come on the problem is wire 9000
or the 12 pin black connection. If there is no ground on wire 9000, the problem is
wire 9000 or the park brake switch.
3. For vehicles equipped with a pilot air dump system supplied by the chassis manufacturer
a. Check LEDs 11, 12, 17 and 18 while the "DUMP" button is being pushed. LEDs 11
and controlled electronically by the HWH leveling system. The "DUMP" button may be
pushed and released. The pilot valve should shift to the dump position and remain there.
and 17 (YELLOW) along with LED 12 (RED) should be on. LED 18 (RED) should be
off. If LEDs 11and/or 17 are not on, or LED 18 is on, replace the control box. If LED
11 is on but LED 12 is off, check fuse F6. If F6 is not blown, push any manual UP
arrow button. If the pump runs, check for power on the two black wires in the four pin
connector on the back of the control box. If power is present, replace the control box.
If power is not present, there is a problem with these wires or their connection to the
master relay. If the pump does not run, proceed to PART 7. If F6 is blown, there may
be a short on the 9300 wire or a problem with the suspension pilot dump valve.
Locate the 4 pin UML connector in the HWH harness. Unplug the 4 pin connector.
Replace the F6 fuse and retry. If the fuse blows again, the problem is with the HWH
9300 wire. If the fuse does not blow, the problem is with the pilot dump valve.
Contact the vehicle manufacturer for assistance. SEE: MP85.184J & MP85.091C
MP85.186E
IGNOUT
(SHIELD)
LD38
MP85.185J
LD39
RLD37
LD36
RR R
12
CN6
GND
CR5 CR6
1
PF1
CN9
T2
R
LD28 CN1
LD23
LD25
LD24
LD22
LD21
LD27
LD26
Y
R
Y
Y
Y
LD29
R
R
R
LD33
G
LD31 LD30
Y G
LD32
R
LD35
LD34
RR
GND
CR7 CR8 CR9
GND
08AUG07
MP85.185J
8
F10
IGN CL CH
PF3
CN8
PF4
CN7
12
1
1
AUX
CN3
12 1
CIRCUIT BOARD CONNECTOR AND PIN LOCATIONS
ELECTRICAL CONNECTION DIAGRAM
CR10
CR1 CR2 CR3 CR4 CR11
+12
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
OR CONNECTION CABLE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
CORRESPONDING RELAY ON.
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
4-PIN CONNECTOR.
IF A YELLOW LED IS NOT LIT, THERE IS A
IF A YELLOW LED IS LIT AND THE
BOX CONNECTION INFORMATION.
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
+12V
REAR
FRONT
GROUND
RIGHT SIDE
LEFT SIDE
28
39 36 37 38
SENSING UNIT
31
PIN 1
FUSE
LED
2
DUMP
4
F1
12
11
F2
REAR RIGHT REAR LEFT
75
32
F4 F9
21
26
27
25
24
23
22 313029
15
16
F7 MASTER
RELAY RELAY
F6
14
13
19 6
F8 PUMP
TRAVEL
17
F3
18
8
353433
PF3
F10
PF4
20
RIGHT
CRX2
FRONT
FRONT LEFT
CRX1
RIGHT REAR PRESS SW
MASTER WARNING
LINK LIGHT
ACCESSORY OUT FOR
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
JACK INTERRUPT
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
NOT USED
NOT USED
LEFT REAR PRESS SW
38-RED
39-RED
33-GREEN
31-GREEN
30-YELLOW
37-RED
36-RED
35-RED
34-RED
32-RED
29-RED
28-RED
13AUG07
MP85.184J
PF4
F10 - 10 AMP
RIGHT FRONT PRESS SW
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
CRX 2
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
PUMP COIL
MASTER RELAY OUTPUT
MASTER RELAY COIL
DUMP OUTPUT
DUMP COIL
LEFT FRONT OUTPUT
LEFT FRONT COIL
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
24-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
27-RED
26-RED
25-RED
18-RED
CRX 1
15-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
16-RED
14-RED
12-RED
8-RED
6-RED
4-RED LEFT REAR COIL
RIGHT REAR OUTPUT
RIGHT REAR COIL
RELAY DESCRIPTION
3-YELLOW
1-YELLOW
2-RED
LED
F9 - 5 AMP
F8 - 5 AMP
F7 - 5 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
F1 - 15 AMP
FUSE
MP85.184J
MP85.091C
PILOT AIR DUMP
STUD
TO HWH
GROUND
SWITCH
WARNING
LEFT REAR
4200
SWITCH
4000
PRESSURE
AB
6235
6231
9301
9300
6230
SWITCH
CONNECTION
DIODE
6231
A
B
C
9301
9300
6230
9001 - TO
PARK BRAKE
LIGHT 9000
7699
08AUG07
RIGHT REAR
MP85.091C
SWITCH
6235
PRESSURE
SWITCH
WARNING
3000
3200
AB
GRAY
4 PIN 12 PIN
BLACK
BLACK
8 PIN
GREEN
12 PIN
12 PIN
GRAY
ELECTRICAL CONNECTION DIAGRAM
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
625 SERIES SINGLE STEP LEVELING SYSTEM
PRESSURE
WARNING
SWITCH
6111
BUZZER
PARK BRAKE
6111
DIODE
7699
MASTER
WARNING
LIGHT
7699
7699
6110
5AMP
FUSE
+
LEFT FRONT 1000
SWITCH
1200
AB
6235
9000
TO IGNITION
TO ACCESSORY
_
6120
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
CAUTION!
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
EXCESS
TRAVEL
HWH COMPUTERIZED LEVELING
TOUCH PANEL
NOTIN
PARK/
SLOPE
AUTO
LEVEL
STOP
EMERGENCY MODE
STORE
AUTO
BRAKE
R
EXTEND
RETRACT
MANUAL
EXTEND
RETRACT
RIGHT FRONT
PILOT DUMP
CONNECTION
9300
DIAGRAM - 625 SERIES
MANIFOLD - PUMP AND
MASTER RELAYS
SEE ELECTRICAL CONNECTION
LEVELING SYSTEM - LEVELING
6230 - 6231
9301
BROWN
12 PIN
BY OEM
6235
PRESSURE
SWITCH
WARNING
SWITCH
2000
2200
AB
SEE: MP85.184J & MP85.091C
LEFT FRONT PRESS SW
PF4
25-RED
SENSING UNIT
LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: THE TRAVEL RELAY IS WIRED AS A
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
NOTE: THE TRAVEL RELAY IS NOT USED ON
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
TRAVEL MODE AND THE IGNITION IS ON.
MP85.184J
ELECTRICAL CONNECTION DIAGRAM - CONTROL
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
IF THE YELLOW LED’S ARE WORKING BUT
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
NO RED LED IS COMING ON THERE MAY BE
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
A LIT RED LED INDICATES THERE IS
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
4-PIN CONNECTOR.
OR CONNECTION CABLE
IF A YELLOW LED IS LIT AND THE
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
FRONT
PIN 1
RIGHT SIDE
+12V
REAR
GROUND
LEFT SIDE
26
28
27
39
SYSTEMS.
383736 35-RED
39-RED
36-RED
38-RED
37-RED
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
26-RED
34-RED
33-GREEN
13AUG07
MP85.184J
F10 - 10 AMP
MASTER WARNING
RIGHT REAR PRESS SW
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
3000 LB PRESS SW INPUT
ACCESSORY OUT FOR
50 LB PRESS SW INPUT
MASTER WARN CONTROL
JACK INTERRUPT
PARK BRAKE
LINK LIGHT
BOARD ENABLE
ACCESSORY IN
NOT USED
NOT USED
PF4
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
31
LEFT
LED
FUSE
F1
2
F2
12
11
4
DUMP
MASTER
TRAVEL
22
21
25
24
23
3029
RELAY
14
13
F6
19
F7
RELAY
17
16
15
6
18
F8
8
F3 PUMP
1
REAR RIGHT LEFT
3
REAR
CRX2
FRONT
5 7
RIGHT FRONT
4-RED
343332 35
F10
F9
20
F4
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
24-YELLOW
PF3
7-YELLOW
11-YELLOW
5-YELLOW
13-YELLOW
12-RED
8-RED
6-RED
15-YELLOW
14-RED
CRX1
1-YELLOW
3-YELLOW
2-RED
LED
F9 - 5 AMP
F8 - 5 AMP
F7 - 5 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
F1 - 15 AMP
FUSE
LEFT REAR OUTPUT
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
MASTER RELAY OUTPUT
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
LEFT FRONT COIL
RIGHT FRONT COIL
LEFT REAR WARN SW
PUMP OUTPUT
TRAVEL OUTPUT
TRAVEL COIL
CRX 2
CRX 1
DUMP OUTPUT
DUMP COIL
PUMP COIL
RELAY DESCRIPTION
RIGHT REAR COIL
RIGHT REAR OUTPUT
LEFT REAR COIL
12 PIN
BROWN
SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
NO CONNECTION
NO CONNECTION
BUZZER & MASTER WARNING LIGHT CONTROL - SWITCHED GROUND
NO CONNECTION
SWITCHED GROUND FROM PARK BRAKE SWITCH
NO CONNECTION
+12 BATTERY FROM MASTER RELAY
GROUND FROM HWH GROUND STUD
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
NO CONNECTION
SWITCHED BATTERY
+12 ACCESSORY / IGNITION
PUMP RELAY CONTROL - SWITCHED +12
SWITCHED +12 FOR DUMP
SWITCHED +12 FOR RIGHT FRONT SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR SOLENOID VALVE
GROUND FOR RIGHT REAR SOLENOID VALVE
GROUND FOR RIGHT FRONT SOLENOID VALVE
SWITCHED +12 FOR LEFT FRONT SOLENOID VALVE
SWITCHED +12 FOR TRAVEL
50 LB PRESSURE SWITCH - SWITCHED GROUND
3000 LB PRESSURE SWITCH - SWITCHED GROUND
MASTER RELAY CONTROL - SWITCHED +12
SHARED GROUND FOR WARNING SWITCHES
625 SERIES LEVELING SYSTEM
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
NO CONNECTION
SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
CONTROL BOX CONNECTION INFORMATION
ELECTRICAL CONNECTION DIAGRAM
BLACK6 7600
BLACK
BLACK
YELLOW
BLACK
BLACK
12 PIN BLACK CONNECTOR
8 PIN BLACK CONNECTOR
WHITE
GREEN
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
BLACK
BLACK
BLACK
BLACK
BLACK
12 PIN GRAY CONNECTOR
BLACK
BLACK
1 AND 2
MP85.6031
12
11
10
9
8
7
6
5
3
4
11
1 AND 2
8
6
7
5
12
3
4
RED
RED
8 THRU 10
1 THRU 6
7
12
10
11
8
7
9
4200
6235
4000
3000
3200
2200
1200
1000
2000
7699
6120
6800
6230
9000
8600
9300
4400
2400
3400
7601
CAN HIGH
GROUND
CAN SHIELD
CAN LOW
BLACK
BLACK
BLACK
BLACK
WHITE
4 PIN GRAY CONNECTOR
12 PIN BROWN CONNECTOR
BLACK
BLACK
BLACK
WIRE
COLOR
5
3
2
4
1
4
3
2
1
RED
PIN #
PIN 1
PIN 12
NUMBER
9301
8500
1400
8101
8100
6800
6230
6100
6800
PIN 1
PIN 8
WIRE
PIN 4
PIN 1
4 PIN
GRAY
MP85.186E
13AUG07
12 PIN
WIRE DESCRIPTION AND FUNCTION
PIN 12
BLACK
BLACK
8 PIN 12 PIN
GRAY
PIN 1
PIN 12
PIN 1

MI91.122
5
08DEC1
5
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
9300 wire, the problem is the suspension pilot dump valve. Contact the vehicle
the 9300 wire, the white ground wire or their connections. If there is power on the
wire and the white ground wire. If there is no power on the 9300 wire, the problem is
"DUMP" button, check between the pins in the 4 pin UML connector for the black 9300
Find the 4 pin UML plug for the pilot dump in the HWH harness. While pushing the
b. LEDs 11 and 17 (YELLOW) and LED 12 (RED) are on and LED 18 (RED) is off.
SEE: MP85.184J & MP85.091Cmanufacturer for assistance.
PART 3. Continued. . .
The following steps, 4 through 16 check the operation of the manual extend (up arrow) and
retract (down arrow) buttons. This should be done before checking the automatic function
of the system. The manual buttons operate jack pairs. Each set of extend and retract
buttons should be checked. Take care not to twist the vehicle. The jack warning switches
and the level sensor are also checked in these steps. Make sure all parts of the leveling
system function during manual operations before proceeding to the automatic operation
section of the manual.
PART 4. THE PUMP WILL NOT RUN WHEN AN UP ARROW (EXTEND) BUTTON IS PUSHED.
THE NOT IN PARK/BRAKE LIGHT COMES ON WHILE PUSHING THE UP ARROW.
wire 9000 or the park brake switch.
SEE: MP85.184J
connector on the back of the control box. If there is a ground on wire 9000, unplug
the 12 pin black conector and ground pin 7 in the box recepticle. If LED 35 does not
come on, replace the control box. If LED 35 does come on the problem is wire 9000
or the 12 pin black connection. If there is no ground on wire 9000, the problem is
b. If LED 35 is off, check for a ground on the 9000 wire on pin 7 of the 12 pin black
a. If LED 35 is on, that indicates there is a signal from the park brake switch.
2. Check LED 35 on the board in the control box. LED 35 should be on.
1. Check that the park brake is set.
SEE: MP85.184J or MP85.186E
- section 3c.
NOTE: LED 36 should be on constant if the ignition is on and the park brake is set.
replace the control box. If both yellow LEDs are
while an UP ARROW is being pushed. All five LED’s should be lit. If all five LED’s
2. Check LEDs 13 (YELLOW), 14 (RED), 15 (YELLOW), 16 (RED) and 36 (RED)
UP ARROWS will run the pump, replace the touch panel.
BUTTON IS PUSHED. THE "NOT IN PARK/BRAKE" LIGHT DOES NOT COME ON.
1. If the pump will not run when one or more UP ARROWS are pushed but other
PART 5. THE PUMP WILL NOT RUN OR RUNS ERRATICALLY WHEN AN UP ARROW (EXTEND)
a. If (red) LED 36 is not lit, refer to
are lit, proceed to #3.
b. If either yellow LED is not lit,
lit, both red LEDs should be lit. (Check LED while pushing an UP arrow.)
SEE: MP85.184J
PART 2
SEE: MP85.184J & MP85.102K or MP85.1035 or MP85.1045
retry. If the fuse only blows with the 8600 wire connected to the pump relay, the
the control box. Disconnect this wire from the pump relay, replace the fuse and
relay is bad. Wire 8600 is on pin 12 in the 12 pin brown connector on the back of
is blown, the 8600 wire going to the pump relay is shorted to ground or the pump
If F8 is OK, replace the control box. If F8
If the fuse only blows with the 8500 wire connected to the master relay, the master
control box. Disconnect this wire from the master relay, replace the fuse and retry.
relay is bad. Wire 8500 is in pin 1 in the 12 pin brown connector on the back of the
is blown, the 8500 wire going to the master relay is shorted to ground or the master
If F7 is OK, replace the control box. If F7
pump relay is bad.
d. If red LED 16 is not lit, check fuse F8.
relay is bad.
c. If red LED 14 is not lit, check fuse F7.
SEE: MP85.184J & MP85.102K
LEVELING SYSTEM - LEVELING
61116111
PARK BRAKE
SWITCH
7699
DIODE
7699
7699
9000
MASTER RELAYS
MANIFOLD - PUMP AND
12 PIN
12 PIN
BROWN
625 SERIES SINGLE STEP LEVELING SYSTEM
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
ELECTRICAL CONNECTION DIAGRAM
BUZZER
SWITCH
WARNING
PRESSURE
LIGHT
WARNING
MASTER
LEFT FRONT
6110
FUSE
5AMP
+
SWITCH
1000
B A
1200
6235
TOUCH PANEL
BRAKE
SLOPE
NOTIN
HWH COMPUTERIZED LEVELING
TRAVEL
EXCESS
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
CAUTION!
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
TO ACCESSORY
TO IGNITION
_
6120
R
AUTO
STORE
MODE
EMERGENCY
STOP
LEVEL
AUTO
PARK/
RETRACT
EXTEND
RETRACT
EXTEND
MANUAL
CONNECTION
PILOT DUMP
RIGHT FRONT
SWITCH
6235
SEE ELECTRICAL CONNECTION
DIAGRAM - 625 SERIES
9300
6230 - 6231
9301
SWITCH
WARNING
2000
BY OEM
B A
2200
PRESSURE
MP85.091C
4200
WARNING
SWITCH
GROUND
TO HWH
STUD
PILOT AIR DUMP
6231
LEFT REAR
6230
9300
9301
PRESSURE
4000
SWITCH
B A
6235
CONNECTION
DIODE
6231
CBA
6230
9300
9301
PARK BRAKE
9001 - TO
LIGHT
7699
9000
3200 MP85.091C
08AUG07
RIGHT REAR
PRESSURE
6235
SWITCH
WARNING
SWITCH
3000
B A
4 PIN
GRAY 8 PIN
BLACK
BLACK
12 PIN
GREEN
GRAY
12 PIN
25-RED LEFT FRONT PRESS SW
PF4
SENSING UNIT
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
IF A YELLOW LED IS LIT AND THE
4-PIN CONNECTOR.
OR CONNECTION CABLE
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
PIN 1
LEFT SIDE
RIGHT SIDE
GROUND
FRONT
REAR
+12V
27
26
28
39
SYSTEMS.
383736 35-RED
36-RED
37-RED
39-RED
38-RED
26-RED
27-RED
28-RED
29-RED
32-RED
34-RED
30-YELLOW
31-GREEN
33-GREEN
F10 - 10 AMP
MP85.184J
13AUG07
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
50 LB PRESS SW INPUT
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
RIGHT REAR PRESS SW
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT
NOT USED
NOT USED
PF4
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
31
LED
FUSE
2
F2
11
12
4
DUMP
F1
TRAVEL
MASTER
22
23
24
25
21 29 30
RELAY
19
13
14
F6 RELAY
F7
8
18
F3
17
PUMP
F8
6
16
15
RIGHT REAR
1
LEFT REAR
3
FRONT
CRX2
FRONT RIGHT
57 4-RED
33 34 3532
F10
20
F9
F4
16-RED
18-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
23-YELLOW
24-YELLOW
PF3
6-RED
8-RED
12-RED
14-RED
5-YELLOW
7-YELLOW
11-YELLOW
13-YELLOW
15-YELLOW
CRX1
2-RED
1-YELLOW
3-YELLOW
LED FUSE
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
MASTER RELAY OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
CRX 1
CRX 2
DUMP COIL
DUMP OUTPUT
PUMP COIL
RELAY DESCRIPTION
RIGHT REAR COIL
RIGHT REAR OUTPUT
LEFT REAR COIL
25-RED LEFT FRONT PRESS SW
PF4
SENSING UNIT
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
IF A YELLOW LED IS LIT AND THE
4-PIN CONNECTOR.
OR CONNECTION CABLE
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
PIN 1
LEFT SIDE
RIGHT SIDE
GROUND
FRONT
REAR
+12V
27
26
28
39
SYSTEMS.
383736 35-RED
36-RED
37-RED
39-RED
38-RED
26-RED
27-RED
28-RED
29-RED
32-RED
34-RED
30-YELLOW
31-GREEN
33-GREEN
F10 - 10 AMP
MP85.184J
13AUG07
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
50 LB PRESS SW INPUT
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
RIGHT REAR PRESS SW
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT
NOT USED
NOT USED
PF4
2400BLACK10 SWITCHED +12 FOR RIGHT FRONT SOLENOID VALVE
MP85.186E
SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
BUZZER & MASTER WARNING LIGHT CONTROL - SWITCHED GROUND
SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
SHARED GROUND FOR WARNING SWITCHES
PUMP RELAY CONTROL - SWITCHED +12
+12 ACCESSORY / IGNITION
SWITCHED GROUND FROM PARK BRAKE SWITCH
SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
31
LED
FUSE
2
F2
11
12
4
DUMP
F1
TRAVEL
MASTER
22
23
24
25
21 29 30
RELAY
19
13
14
F6 RELAY
F7
8
18
F3
17
PUMP
F8
6
16
15
RIGHT REAR
1
LEFT REAR
3
FRONT
CRX2
FRONT RIGHT
57 4-RED
33 34 3532
F10
20
F9
F4
16-RED
18-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
23-YELLOW
24-YELLOW
PF3
6-RED
8-RED
12-RED
14-RED
5-YELLOW
7-YELLOW
11-YELLOW
13-YELLOW
15-YELLOW
CRX1
2-RED
1-YELLOW
3-YELLOW
LED
6230
6800
6120
8600
9000
7699
1000
2000
1200
2200
3200
3000
4000
4200
6235
9300
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
MP85.6031
10
11
8
9
7
6
4
5
12
WHITE
BLACK
BLACK
BLACK
BLACK
GREEN
YELLOW
12 PIN GRAY CONNECTOR
8 PIN BLACK CONNECTOR
12 PIN BLACK CONNECTOR
BLACK
1 AND 2
1 AND 2
5
6
4
3
3
8
7RED
RED
1 THRU 6
8 THRU 10
12
12
11
7
11
NO CONNECTION
CAN LOW
CAN HIGH
SWITCHED +12 FOR DUMP
SWITCHED BATTERY
NO CONNECTION
CAN SHIELD
NO CONNECTION
NO CONNECTION
NO CONNECTION
NO CONNECTION
GROUND
FUSE
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
MASTER RELAY OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
CRX 1
CRX 2
DUMP COIL
DUMP OUTPUT
PUMP COIL
RELAY DESCRIPTION
RIGHT REAR COIL
RIGHT REAR OUTPUT
LEFT REAR COIL
MP85.186E
13AUG07
PIN 1
PIN 12
WIRE DESCRIPTION AND FUNCTION
GROUND FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR SOLENOID VALVE
ELECTRICAL CONNECTION DIAGRAM
CONTROL BOX CONNECTION INFORMATION
625 SERIES LEVELING SYSTEM
MASTER RELAY CONTROL - SWITCHED +12
3000 LB PRESSURE SWITCH - SWITCHED GROUND
50 LB PRESSURE SWITCH - SWITCHED GROUND
SWITCHED +12 FOR TRAVEL
SWITCHED +12 FOR LEFT FRONT SOLENOID VALVE
GROUND FOR RIGHT FRONT SOLENOID VALVE
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
GROUND FROM HWH GROUND STUD
+12 BATTERY FROM MASTER RELAY
PIN 12
6800
PIN 1
PIN 4
WIRE
PIN 8
PIN 1
NUMBER
PIN 1
7601
3400
4400
6100
6230
8100
8101
1400
8500
9301
7600
6800
BLACK
COLOR
WIRE
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
BLACK
BLACK
BLACK
BLACK
12 PIN BROWN CONNECTOR
4 PIN GRAY CONNECTOR
7
8
9
4
6
5
3
2
1
1
4
3
2
PIN #
RED
4 PIN
GRAY
12 PIN
BLACK
BLACK
12 PIN
BROWN
8 PIN
PIN 12
PIN 1
GRAY
12 PIN
3400
7601
7600
2400
6240
6240
4400
1400
TO HWH GROUND STUD - 6240
MP85.102K
MASTER
RELAY
PUMP
#7 RELAY
#8
MP85.102K
14JUN05
4 PIN
GRAY
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
TO 3000 LB PRESSURE SWITCH - 8100
#9
TO PUMP
MOTOR
+
MOTOR
PUMP
#6
8600
LEVELING
MANIFOLD
HWH GROUND
STUD
#1
#3
#5
#4
8500
TO 50 LB PRESSURE SWITCH - 8101
LEVELING MANIFOLD
PUMP AND MASTER RELAYS
LEVELING MANIFOLD
P.E.D
A A
BBABA
P.E.DP.E.DP.E.D
B
RR
LF
LR
RF
HARNESS
6230 - TO HWH
GROUND STUD
6800
TO HOUSE
BATTERY
#2
BROWN
8 PIN
BLACK
TOUCH PANEL
12 PIN
The problem is the control box. Replace the control box.

MI91.1235
10SEP07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
an UP ARROW is being pushed. The problem is with the relays or the pump motor.
SEE: MP85.184J
3. LEDs 13 (YELLOW), 14 (RED), 15 (YELLOW), 16 (RED) and 36 (RED) are lit when
a. Terminals 1, 2, 3, 4, 5, 6 and 9 should all have power when above LEDs are lit.
Terminals 7 and 8 should be connected to the ground stud on the side of the pump.
Make sure all terminals are tight and that the wires, ring terminals and the relay
terminals are free of corrosion. SEE: MP85.1035 or MP85.102K or MP85.1045
b. If terminal 1 has no power, the problem is the 8500 wire or it’s connections to the
control box or to the master relay.
c. If terminal 2 has no power, the problem is the battery cable from the battery supply
or it’s connections to the battery supply or to the master relay.
SEE: MP85.102K or MP85.1035 or MP85.1045
d. If terminals 1 and 2 have power, check terminal 8 for ground. If ground is not
present, the problem is the white ground wire or it’s connections to the ground stud
or to the master relay. SEE: MP85.1035 or MP85.102K or MP85.1045
e. If terminals 1 and 2 have power and terminal 8 has a ground, check terminal 3
for power. If there is no power on terminal 3, replace the master relay.
f. If terminals 1,2 and 3 have power, check terminal 4. If terminal 4 has no power, the
problem is the short cable between terminals 3 and 4 or it’s connection to these
terminals.
g. If terminal 4 has power, check terminal 5 for power. If terminal 5 has no power, the
problem is the 8600 wire or it’s connections to the control box or to the pump relay.
h. If terminal 5 has power, check terminal 7 for ground. If a ground is not present,
the problem is the white ground wire or it’s connections to the ground stud or to
SEE: MP85.1035 or MP85.102K or MP85.1045
SEE: MP85.1035 or MP85.102K or MP85.1045
SEE: MP85.1035 or MP85.102K or MP85.1045
the pump relay.
SEE: MP85.1035 or MP85.102K or MP85.1045
SEE: MP85.1035 or MP85.102K or MP85.1045
PART 5. Continued. . .
SEE: MP85.1035 or MP85.102K or MP85.1045
motor is tight. If all connections, mountings and wires are OK, replace the pump motor.
the assembly supplies the ground for the motor. Make sure the stud on the pump
a good frame mounting. The pump motor is internally grounded and the mounting of
or it’s connections. If terminal 9 has power, make sure the power unit assembly has
power, the problem is the short cable between the pump relay and the pump motor
j. If terminal 6 has power, check terminal 9 on the pump motor. If terminal 9 has no
i. If terminal 5 has power and terminal 7 has a ground, check terminal 6 for power.
If terminal 6 does not have power, replace the pump relay.
SEE: MP85.1035 or MP85.102K or MP85.1045
F2 - 15 AMP4-RED LEFT REAR OUTPUT
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
LATER LED’S 3 AND 19 WILL TURN OFF.
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
IF A YELLOW LED IS LIT AND THE
4-PIN CONNECTOR.
OR CONNECTION CABLE SYSTEMS.
31
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
SENSING UNIT
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
PIN 1
LEFT SIDE
RIGHT SIDE
GROUND
FRONT
REAR
+12V
27
26
28
39
LED
FUSE
2
F2
11
12
F1
4
DUMP
TRAVEL
MASTER
22
23
24
25
21 29 30
RELAY
19
13
14
F6 RELAY
F7
8
18
F3
17
PUMP
F8
6
16
15
PF4
383736 35-RED
36-RED
37-RED
39-RED
38-RED
26-RED
27-RED
28-RED
29-RED
32-RED
34-RED
30-YELLOW
31-GREEN
33-GREEN
33 34 3532
F10
20
F9
F4
16-RED
18-RED
25-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
23-YELLOW
24-YELLOW
PF3
6-RED
8-RED
12-RED
14-RED
5-YELLOW
7-YELLOW
11-YELLOW
13-YELLOW
15-YELLOW
MP85.184J
13AUG07
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
F10 - 10 AMP
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
50 LB PRESS SW INPUT
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
RIGHT REAR PRESS SW
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT
NOT USED
NOT USED
PF4
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
MASTER RELAY OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
LEFT FRONT PRESS SW
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
CRX 1
CRX 2
DUMP COIL
DUMP OUTPUT
PUMP COIL
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT RIGHT REAR
1
LEFT REAR
3
FRONT
CRX2
FRONT RIGHT
57
CRX1
2-RED
1-YELLOW
3-YELLOW
LED FUSE
F1 - 15 AMP
RELAY DESCRIPTION
RIGHT REAR COIL
RIGHT REAR OUTPUT
LEFT REAR COIL
GROUND STUD
6230 - TO HWH
LEVELING MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
PUMP AND MASTER RELAYS WITH PILOT AIR DUMP
LEVELING MANIFOLD
MOTOR
PUMP
MOTOR
#7
#6
RELAY
PUMP
#4
#5
6231 - TO HWH
#9
GROUND STUD
TO PUMP
+
8600
HWH GROUND
MANIFOLD
STUD
TO HWH GROUND STUD - 6240
TO 3000 LB PRESSURE SWITCH - 8100
TO 50 LB PRESSURE SWITCH - 8101
1400
4400
6240
6240
A
B
A
B
2400
7600
7601
BA
A
B
3400
MANIFOLD NOT SHOWN
NOTE: ROOM EXTENSION
LEVELING
P.E.D P.E.D P.E.D P.E.D
RF
RR
LR
LF
BLACK
8 PIN
RELAY
MASTER
#1
#3
#8
#2
BATTERY
8500 6800
TO +12V
6100
27APR05
MP85.1035
12 PIN
GRAY
GROUND STUD
TO HWH
SYSTEM - AIR DUMP
625 SERIES LEVELING
DIAGRAM
CONNECTION
SEE ELECTRICAL
12 PIN
BLACK
BROWN
9300
GRAY
4 PIN
12 PIN
6230
9301
MP85.1035
IMPORTANT: THE DEFINITION OF POWER IS 10.0 VOLTS OR MORE AT THE
MASTER AND PUMP RELAYS WITH LEDs 13,14,15 AND 16 ON.
4. The pump runs erratically or slowly. Review number 3 of PART 5. (This section)

MI91.1245
10SEP07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
5 (right front solenoid valve) and 7 (right rear solenoid valve).
the red LEDs 2 (right rear solenoid valve),
4 (left rear solenoid valve), 6 (right front solenoid valve) and 8 (left front solenoid valve)
should come on. The LEDs will come on with their respective UP ARROWS as follows:
LEDs 5 and 7 (YELLOW) and LEDs 6 and 8 (RED)
LEDs 1 and 3 (YELLOW) and LEDs 2 and 4 (RED)
LEDs 1 and 5 (YELLOW) and LEDs 2 and 6 (RED)
LEDs 3 and 7 (YELLOW) and LEDs 4 and 8 (RED)
If the red LEDs are not coming on,
If the red LEDs are coming on as necessary,
on the appropriate output pins for the solenoid valves. There is most likely a problem
with the 12 pin brown connector on the back of the control box, the wires to the
REAR UP ARROW
RIGHT SIDE UP ARROW
LEFT SIDE UP ARROW
SEE: MP85.184J
THE PUMP RUNS UNDER A LOAD.
3. Check yellow LEDs 1 (right rear solenoid valve), 3 (left rear solenoid valve),
PART 6. WHEN PUSHING ANY UP ARROW (EXTEND) BUTTON, NO JACKS WILL EXTEND,
1. Use the manual valve release on the valves to open at least two (2) of the solenoid valves.
FRONT UP ARROW
Push any up arrow to make the pump run. If the jacks start to extend, proceed to section 2.
If no jacks extend, replace the shuttle valve.
2. Check LED’s 19 and 20. If either LED is not lit, replace the control box. SEE: MP85.184J
a. If yellow LED’s 1, 3, 5 and 7 are coming on,
the 6800 wire going to the 4 pin gray connector
this indicates there should be power
solenoid valves or their connections. Check the voltage for the valves at the valve
plugs while pushing an up arrow. With the valve plugged in and the pump running,
there should be a minimum of 10 volts. If the voltage is lower with the pump running,
replace the control box.
b. If yellow LED’s 1, 3, 5 and 7 are NOT coming on,
WILL EXTEND BUT NOT LIFT THE VEHICLE. THE PUMP IS FREE WHEELING UNDER
while running, should not be less than 10 volts. If the vehicle is equipped with any
HWH hydraulic room extensions, make sure none of the room extension solenoid
If the pump pressure is OK, replace the shuttle valve.
developing adequate pressure, replace the pump.
PART 7. WHEN PUSHING ANY UP ARROW (EXTEND) BUTTON, NO JACKS WILL EXTEND OR
a. Check the pump pressure. The pump pressure should
1. The problem is most likely the shuttle valve or the pump. Voltage at the pump motor,
SEE: MP65.600C
SEE: MP85.184J & MP85.102K or MP85.1035 or MP85.1045
SEE: MP85.184J & MP85.102K or MP85.1035 or MP85.1045
SEE: MP85.184J
MASTER RELAY OUTPUT F7 - 5 AMP14-RED
PUMP RELAY RELAY MASTER
TRAVEL
DUMP
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
MP85.184J
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
OR CONNECTION CABLE
4-PIN CONNECTOR.
SYSTEMS.
31
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
LEFT SIDE
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
GROUND 39
SENSING UNIT
+12V
REAR
FRONT
PIN 1
RIGHT SIDE
25
24
28
26
27
21
23
22 29 30
3836 37 34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
F10
3532 3433
24-YELLOW
25-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
26-RED
PF4
15-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
PF3
13AUG07
MP85.184J
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
LEFT RIGHT
FUSE
LED
1
2
12
11
F2
3
4
F1
REAR REAR LEFT RIGHT
CRX2
FRONT
FRONT
F7
F6
14
13
19
7
17
18
8
5
15
16
6
F8
F3
CRX1
F4 F9
20
2-RED
3-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
1-YELLOW
LED FUSE
F1 - 15 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
LEFT FRONT COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
on the back of the control box may be the problem. Check fuses F1, F2, F3 and F4.
If these fuses are blown, the solenoid valves may be bad. Whenever the ignition is
on and the park brake is set, the 6800 wire should have power on it. The 6800 wire
connects to terminal 3 of the master relay. If there is no power on the 6800 wire,
the connections to the problem is with the 6800 wire or it’s control box or to the
master relay. If the pump runs, the master relay is good. If the pump does not
run, refer to PART 7. If there is power on the 6800 wire, fuses F1, F2, F3 and F4
are OK and the red LEDs will not come on, replace the control box.
that indicates there may be a problem with the system grounds or the voltage supply
to the pump motor.
MASTER RELAY OUTPUT F7 - 5 AMP14-RED
PUMP RELAY RELAY MASTER
TRAVEL
DUMP
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
MP85.184J
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
OR CONNECTION CABLE
4-PIN CONNECTOR.
SYSTEMS.
31
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
LEFT SIDE
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
GROUND 39
SENSING UNIT
+12V
REAR
FRONT
PIN 1
RIGHT SIDE
25
24
28
26
27
21
23
22 29 30
3836 37 34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
F10
3532 3433
24-YELLOW
25-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
26-RED
PF4
15-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
PF3
13AUG07
MP85.184J
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
LEFT RIGHT
FUSE
LED
1
2
12
11
F2
3
4
F1
REAR REAR LEFT RIGHT
CRX2
FRONT
FRONT
F7
F6
14
13
19
7
17
18
8
5
15
16
6
F8
F3
CRX1
F4 F9
20
2-RED
3-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
1-YELLOW
LED FUSE
F1 - 15 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
LEFT FRONT COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
NO LOAD.
valves are open.
3400
7601
7600
2400
6240
6240
4400
1400
TO HWH GROUND STUD - 6240
MP85.102K
MASTER
RELAY
PUMP
#7 RELAY
#8
MP85.102K
14JUN05
4 PIN
GRAY
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
TO 3000 LB PRESSURE SWITCH - 8100
#9
TO PUMP
MOTOR
+
MOTOR
PUMP
#6
8600
LEVELING
MANIFOLD
HWH GROUND
STUD
#1
#3
#5
#4
8500
TO 50 LB PRESSURE SWITCH - 8101
LEVELING MANIFOLD
PUMP AND MASTER RELAYS
LEVELING MANIFOLD
P.E.D
A A
BBABA
P.E.DP.E.DP.E.D
B
RR
LF
LR
RF
HARNESS
6230 - TO HWH
GROUND STUD
6800
TO HOUSE
BATTERY
#2
BROWN
8 PIN
BLACK
TOUCH PANEL
12 PIN
12 PIN
MP85.1035
8600
NOTE: ROOM EXTENSION
MANIFOLD NOT SHOWN
PUMP
MOTOR
#6
#7
#9
MOTOR
TO PUMP
+
HWH GROUND
GROUND STUD
6231 - TO HWH
STUD
LEVELING
MANIFOLD
PUMP
RELAY
#5
#4 #3
#1
8500
6230 - TO HWH
GROUND STUD
MP85.1035
27APR05
GRAY
12 PIN
TO +12V
6800
BATTERY
MASTER
RELAY
#2
#8
6100
4 PIN
GRAY
BROWN
8 PIN
BLACK
12 PIN
BLACK
LEVELING MANIFOLD
PUMP AND MASTER RELAYS WITH PILOT AIR DUMP
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
TO 50 LB PRESSURE SWITCH - 8101
TO 3000 LB PRESSURE SWITCH - 8100
TO HWH GROUND STUD - 6240
6240
6240
4400
ABA
3400
7601
7600
2400
1400
BAA
BB
P.E.DP.E.D P.E.DP.E.D
LEVELING MANIFOLD
LF
LR
RR
RF
GROUND STUD
SEE ELECTRICAL
625 SERIES LEVELING
SYSTEM - AIR DUMP
9301
6230
9300
TO HWH
CONNECTION
DIAGRAM
LEVELING MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
PUMP AND MASTER RELAYS
LEVELING MANIFOLD - AIR DUMP
MOTOR
PUMP
MOTOR
#7
#6
RELAY
PUMP
#4
#5
TO PUMP
#9
+
8600
HWH GROUND
MANIFOLD
STUD
TO HWH GROUND STUD - 6240
TO 3000 LB PRESSURE SWITCH - 8100
TO 50 LB PRESSURE SWITCH - 8101
1400
4400
6240
6240
A
B
A
B
2400
7600
7601
BA
A
B
3400
LEVELING
P.E.D P.E.D P.E.D P.E.D
RF
RR
LR
LF
HARNESS
TOUCH PANEL
GROUND STUD
6230 - TO HWH
BLACK
8 PIN
RELAY
MASTER
#1
#3
BATTERY
#8
#2
TO HOUSE
6800
14JUN05
MP85.1045
6230
9300
REAR AIR DUMP SOLENOID
REAR AIR DUMP SOLENOID
FRONT AIR DUMP SOLENOID
BROWN
TO HWH GROUND
GRAY
4 PIN
9300
12 PIN
STUD - 6230
AB
P.E.D
B A B A B A
MP85.1045
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
(ROOM EXTENSION MANIFOLD NOT SHOWN)
VELOCITY VALVE
625 SERIES LEVELING SYSTEM
ASSEMBLY
PUMP/MANIFOLD
(WITH 4 STRAIGHT-ACTING JACKS)
HYDRAULIC LINE CONNECTION DIAGRAM
RETRACTION IN OPERATOR’S INSTRUCTIONS.
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
MP65.2802
REAR
LEFT
3000 PSI
PRESSURE
WITH VELOCITY
ARE EQUIPPED
NOTE: SOME
SWITCH
HERE
PRESSURE
VALVES
MANIFOLDS
LR LF
FRONT
LEFT
CHECK PUMP
BREATHER
NUTS
RELEASE
VALVE
CAP
NOTE: 50 PSI
PRESSURE
SWITCH MAY NOT
BE USED ON ALL
625 MANIFOLDS.
RF RR
PRESSURE
VALVE
SHUTTLE
SWITCH
50 PSI
08AUG06
MP65.600C
RIGHT
REAR
"T" HANDLES
VALVE
RELEASE
THIS MANIFOLD
FRONT
RIGHT
be between 3300 p.s.i. and 3600 p.s.i. If the pump is not
MP65.600C

MI91.1250
28NOV07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
PART 8. WHEN PUSHING AN UP ARROW, THE CORRECT JACKS DO NOT EXTEND.
1. When testing the function of the UP ARROWS, always test all four UP ARROWS. Make
sure that not only the correct jacks are operating but also other jacks are not moving. The
problem most likely the plumbing or wire connections at the solenoid valves or control box.
Check that the correct yellow and red LEDs are coming on for the UP ARROW that is being
pushed. If the correct LEDs are not coming on, the control box is bad. Refer to the
plumbing diagram and check that the correct jack is connected to the appropriate
solenoid valve. Move hose connections as necessary. SEE: MP85.184J & MP65.600C
NOTE: If the plumbing is incorrect, change the plumbing as necessary, DO NOT
change the way the solenoid valves are wired. Do not remove hoses until all jacks
are retracted. When re-tightening a hose end, tighten the hose end finger tight (snug)
plus 1/4 turn. DO NOT OVER TIGHTEN.
If the plumbing is OK, refer to the wiring diagrams to check the wiring. The solenoid
valve wires are in the 12 pin brown connector on the back of the control box as follows:
LEFT FRONT SOLENOID VALVE ---- WIRE 1400 ----- PIN 5
RIGHT FRONT SOLENOID VALVE -- WIRE 2400 ----- PIN 10
RIGHT REAR SOLENOID VALVE ---- WIRE 3400 ----- PIN 9
LEFT REAR SOLENOID VALVE ------ WIRE 4400 ----- PIN 8
Move the wires in the plug or at the solenoid valves as necessary. Retry the system.
PART 9. ONE OR MORE JACKS WILL NOT EXTEND, OTHER JACKS ARE FUNCTIONING
SEE: MP85.1035
PROPERLY. THE PUMP IS RUNNING NORMALLY.
1. Check yellow LEDs 19 and 20. If either LED is off, replace the control box. Check the
a. If the yellow LED is not coming on, replace the control box.
b. If the yellow LED is coming on but the red LED is not coming on, check the appropriate fuse. If the fuse is OK,
replace the control box. If the fuse is blown, unplug the solenoid valve, replace the fuse and retry. If the fuse
blows, the wires for the valve or their connections are shorted OR the control box is bad. If the fuse only
SEE: MP85.184J
c. If the yellow and red LEDs are coming on, check for power between the two wires in the plug at the solenoid
valve. If there is power at the plug, replace the solenoid valve. If there is no power at the plug, the problem
problem is the wires or their connections. The solenoid valve wires are in the 12 pin brown connector on the
control box. Wiring for the solenoid valves is as follows:
LEFT FRONT VALVE ----- POWER ----- WIRE 1400 ----- PIN 5
GROUND --- WHITE WIRE TO GROUND STUD
RIGHT FRONT VALVE --- POWER ----- WIRE 2400 ----- PIN 10
GROUND --- WIRE 7600 ----- PIN 6
GROUND --- WIRE 7601 ----- PIN 7
RIGHT REAR VALVE ----- POWER ----- WIRE 3400 ----- PIN 9
GROUND --- WHITE WIRE TO GROUND STUD
LEFT REAR VALVE ------- POWER ----- WIRE 4400 ----- PIN 8
NOTE: Low voltage can be a problem. With the valve plugged in and turned on, there should be a minimum
of 10 volts between the two wires for the valve. If there is less than 10 volts, low volts may be the problem.
PART 10. ONE OR MORE JACKS WILL NOT STAY DOWN AFTER BEING EXTENDED TO THE GROUND.
BLACK
RELAY
MASTER
MP85.1035
RELAY
PUMP
+TO PUMP
MOTOR
#7
#6
STUD
6231 - TO HWH
GROUND STUD
HWH GROUND
MOTOR
PUMP
#9 8600
#4
#5 #1
#3
GROUND STUD
6230 - TO HWH
8500
27APR05
MP85.1035
BATTERY
TO +12V
#8
#2
6800
6100
GRAY
12 PIN
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
PUMP AND MASTER RELAYS WITH PILOT AIR DUMP
MP65.600C
RR
(ROOM EXTENSION MANIFOLD NOT SHOWN)
LEVELING MANIFOLD
TO 50 LB PRESSURE SWITCH - 8101
TO 3000 LB PRESSURE SWITCH - 8100
MANIFOLD NOT SHOWN
NOTE: ROOM EXTENSION
P.E.D
7600
MANIFOLD
TO HWH GROUND STUD - 6240
LEVELING
A A
B
A
B
1400
4400
6240
6240
P.E.D P.E.D
B
A
B
2400
7601
3400
P.E.D
RF
LF
LR
LEVELING MANIFOLD
RR
MANIFOLDS
SWITCH
NOTE: SOME
ARE EQUIPPED
WITH VELOCITY
PRESSURE
3000 PSI
LEFT
REAR
VALVES
VELOCITY VALVE
LF
PUMP/MANIFOLD
ASSEMBLY
LR RF
SYSTEM - AIR DUMP
BROWN
12 PIN
GRAY
4 PIN
8 PIN
12 PIN
BLACK
GROUND STUD
TO HWH
625 SERIES LEVELING
DIAGRAM
CONNECTION
SEE ELECTRICAL
9300
6230
9301
REAR
RIGHT
MP65.600C
23FEB04
SHUTTLE
VALVE
PRESSURE
50 PSI
SWITCH
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
RETRACTION IN OPERATOR’S INSTRUCTIONS.
HYDRAULIC LINE CONNECTION DIAGRAM
(WITH 4 STRAIGHT-ACTING JACKS)
625 SERIES LEVELING SYSTEM
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
RELEASE
BREATHER
FRONT
LEFT
VALVE
NUTS
CAP RIGHT
FRONT
"T" HANDLES
RELEASE
VALVE
THIS MANIFOLD
6230 625 SERIES LEVELING
MP85.1035
TO 3000 LB PRESSURE SWITCH - 8100
MANIFOLD NOT SHOWN
NOTE: ROOM EXTENSION
MANIFOLD
HWH GROUND
STUD
TO HWH GROUND STUD - 6240
LEVELING
BAA
B
A
B
7600
1400
4400
6240
6240
P.E.DP.E.D P.E.D
RF
LF
LR
8 PIN
BLACK
GRAY
12 PIN
SYSTEM - AIR DUMP
BROWN
12 PIN
GRAY
4 PIN 12PIN
BLACK
GROUND STUD
TO HWH
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
PUMP AND MASTER RELAYS WITH PILOT AIR DUMP
LEVELING MANIFOLD
TO 50 LB PRESSURE SWITCH - 8101
A
B
2400
7601
3400
P.E.D
LEVELING MANIFOLD
RR
DIAGRAM
CONNECTION
SEE ELECTRICAL
9300
9301
MP85.184J
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
5-YELLOW
LED
FUSE 11
12
DUMP
RELAY
13
14
F6
F7 MASTER
RELAY
F8
16
15 18
17
TRAVEL
PUMP
F9
17-YELLOW
18-RED
6-RED
8-RED
12-RED
7-YELLOW
11-YELLOW
13-YELLOW
16-RED
15-YELLOW
14-RED
LEFT REAR
2
1
RIGHT LEFT REAR F1
4
3
F2
19
FRONT
CRX2
F3
6
5
8
7
FRONT RIGHT
20
F4
CRX1
1-YELLOW
4-RED
3-YELLOW
2-RED
LED
RIGHT FRONT COIL F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
F7 - 5 AMP
RIGHT FRONT OUTPUT
LEFT FRONT OUTPUT
MASTER RELAY COIL
LEFT FRONT COIL
MASTER RELAY OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
DUMP COIL
DUMP OUTPUT
PUMP OUTPUT
PUMP COIL
F2 - 15 AMP
F1 - 15 AMP
FUSE
LEFT REAR OUTPUT
RELAY DESCRIPTION
RIGHT REAR OUTPUT
RIGHT REAR COIL
LEFT REAR COIL
SEE: MP85.1035
blows with the solenoid valve plugged in, replace the solenoid valve.
yellow and red LEDs for the jack(s) that will not extend.
can affect the movement of the jacks.
jack stops retracting, the control box is most likely the problem.
If a jack retracts more than 1/2 inch after being extended to the ground, if there are no visible leaks, replace the
solenoid valve. To check this, extend the jacks to the ground and lift the coach slightly. Allow the vehicle to set
If a jack retracts quickly after being extended, retry and push the OFF button as soon as the
UP ARROW is released. If the jack continues to retract, replace the solenoid valve. If the
on the jacks for 10 minutes before marking the rods. Mark the rods of the jacks with a piece of tape about 1 inch
down from the barrel of the jack. Monitor this to see how far the jack will retract. Extreme changes in temperature
2.
1.

MI91.1255
10SEP07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
SEE: MP85.184J
on the touch panel is not coming on.
a. The warning switch LED in the control box is coming on but the warning light
PART 11. A RED WARNING LIGHT ON THE TOUCH PANEL WILL NOT TURN ON WHEN IT’S
JACK IS EXTENDED 1/4 TO 1/2 INCH OR MORE.
1. Each jack has a two wire magnetic warning switch. The switch is located on top of the
jack. There is a magnet inside the jack. The contacts of the switch close when the jack
has extended approximately 1/4 to 1/2 inch. The contacts open when the jack is retracted.
The white wire in the harness supplies a ground to the switch and the black wire carries a
ground signal to the control box when the jack is extended and the switch contacts are
closed. There is a yellow LED in the control box for each warning switch input. A lit
yellow LED indicates the warning switch is on. The warning switch LEDs and inputs are:
LEFT FRONT ----- LED 21 ----- PIN 3 ----- WIRE 1000
RIGHT FRONT --- LED 22 ----- PIN 4 ----- WIRE 2000
RIGHT REAR ----- LED 23 ----- PIN 9 ----- WIRE 3000
LEFT REAR ------- LED 24 ----- PIN 10 --- WIRE 4000
The warning switch inputs are in the 12 pin gray connector on the back of the control box.
but could be the touch panel.
b. The warning switch LED in the control box is not coming on.
SEE: MP85.186E
connector from the back of the control box. Ground the appropriate pin in the box
connector. If the warning switch LED does not come on, replace the control box.
If the warning switch LED comes on, the problem is the wire harness or the jack
warning switch. Plug the 12 pin connector back into the control box.
c. If the problem is the wire harness or warning switch, unplug the warning switch at
the jack. Short the two pins in the harness plug together. If the warning switch LED
comes on, replace the warning switch. If the warning switch LED does not come on,
short the black warning switch wire in the harness to ground. If the warning switch
LED does not come on, the problem is the black wire or it’s connections. If the
warning switch LED comes on, the problem is the white ground wire.
SEE: MP85.186E
SEE: MP85.091C
1. The master "JACKS DOWN" warning light and buzzer are controlled by one wire from
the control box. If one works but the other does not, the problem would only be with the
component that is not working.
2. The LED 32 should be on if any warning switch LED is on.
a. If LED 32 is not on and any warning switch LED is on, replace the control box.
b. If LED 32 is on, unplug the 12 pin black connector from the control box and check
pin 11 for a ground. If a ground is not present, replace the control box.
c. If there is a ground on pin 11 in the 12 pin black
connector, the problem is the 7699 wire, the light,
SEE: MP85.184J
SEE: MP85.186E
SEE: MP85.186E & MP85.304R
PART 12. THE MASTER WARNING LIGHT AND BUZZER WILL NOT COME ON WHEN A
TOUCH PANEL WARNING LIGHT IS ON.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
A LIT RED LED INDICATES THERE IS LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
MP85.184J
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
OR CONNECTION CABLE
4-PIN CONNECTOR.
IF A YELLOW LED IS LIT AND THE
SYSTEMS.
13AUG07
MP85.184J
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
5-YELLOW
31
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
PIN 1 27
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
LEFT SIDE
GROUND
+12V
REAR
FRONT
RIGHT SIDE
28
39
SENSING UNIT
FUSE
LED
DUMP
12
11
25
24
26
21
23
22 29 30
RELAY RELAY MASTER
F7
F6
14
13
PUMP
TRAVEL
17
18
15
16
F8
3836 37
38-RED
39-RED
37-RED
34-RED
36-RED
35-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
3532 3433
F10
F9
17-YELLOW
24-YELLOW
25-RED
26-RED
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
18-RED
PF4PF3
14-RED
15-YELLOW
16-RED
13-YELLOW
11-YELLOW
7-YELLOW
12-RED
8-RED
6-RED
LEFT RIGHT
1
2
REAR
F2
3
4
F1
REAR LEFT
CRX2
FRONT
19
RIGHT FRONT
7
8
5
6
F3
CRX1
F4
20
2-RED
3-YELLOW
4-RED
1-YELLOW
LED
RIGHT FRONT COIL
F7 - 5 AMP
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
NOT USED
NOT USED
PF4
MASTER RELAY OUTPUT
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT FRONT PRESS SW
LEFT FRONT COIL
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
CRX 2
CRX 1
PUMP COIL
PUMP OUTPUT
DUMP OUTPUT
DUMP COIL
FUSE
F1 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
LEFT REAR OUTPUT
LEFT REAR COIL
MP85.091C
STUD
WARNING
SWITCH
PILOT AIR DUMP
6235
LEFT REAR 4000
4200
9300
6231
6230
9301
PRESSURE
SWITCH
AB
CONNECTION
CA
B
6231
9300
9301
6230
RIGHT REAR
MP85.091C
08AUG07
3000 6235 3200
PRESSURE
SWITCH
SWITCH
WARNING
AB
ELECTRICAL CONNECTION DIAGRAM
625 SERIES SINGLE STEP LEVELING SYSTEM
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
WARNING
SWITCH
PRESSURE
6111
BUZZER
TO HWH
GROUND
6111
PARK BRAKE
SWITCH
DIODE
7699
DIODE
+
7699
7699
WARNING
MASTER
LIGHT
LEFT FRONT
6110
5AMP
FUSE
1200
SWITCH
1000
AB
6235
9001 - TO
PARK BRAKE
LIGHT
9000
_
9000
7699
NOTIN
TRAVEL
BRAKE
SLOPE
EXCESS
HWH COMPUTERIZED LEVELING
TOUCH PANEL
CAUTION!
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
TO IGNITION
TO ACCESSORY
6120
AUTO
LEVEL
STORE
AUTO
EMERGENCY
STOP MODE
PARK/
R
RETRACT
EXTEND
MANUAL
RETRACT
EXTEND
RIGHT FRONT
PILOT DUMP
CONNECTION
DIAGRAM - 625 SERIES
MANIFOLD - PUMP AND
MASTER RELAYS
LEVELING SYSTEM - LEVELING
GRAY
4 PIN
12 PIN
BLACK
8 PIN
12 PIN
BLACK
BROWN
12 PIN
GREEN
12 PIN
GRAY
PRESSURE
SWITCH
6235
SEE ELECTRICAL CONNECTION
6230 - 6231
9301
9300
WARNING
SWITCH
2000
2200
BY OEM
AB
240010 BLACK SWITCHED +12 FOR RIGHT FRONT SOLENOID VALVE
SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
SHARED GROUND FOR WARNING SWITCHES
PUMP RELAY CONTROL - SWITCHED +12
+12 ACCESSORY / IGNITION
SWITCHED GROUND FROM PARK BRAKE SWITCH
BUZZER & MASTER WARNING LIGHT CONTROL - SWITCHED GROUND
SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
MP85.186E
9300
8600
9000
6230
6800
6120
7699
2000
1000
1200
2200
3200
3000
4000
6235
4200
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
WHITE
BLACK
MP85.6031
4
5
6
7
8
9
10
11
12
BLACK
12 PIN GRAY CONNECTOR
BLACK
GREEN
WHITE
8 PIN BLACK CONNECTOR
12 PIN BLACK CONNECTOR
BLACK
BLACK
YELLOW
BLACK
1 AND 2
1 AND 2
4
3
5
7
6
8
3
RED
RED
1 THRU 6
8 THRU 10
11
12
7
12
11
NO CONNECTION
CAN LOW
CAN SHIELD
CAN HIGH
SWITCHED +12 FOR DUMP
SWITCHED BATTERY
NO CONNECTION
NO CONNECTION
NO CONNECTION
NO CONNECTION
NO CONNECTION
GROUND
13AUG07
MP85.186E
PIN 1
PIN 12
WIRE DESCRIPTION AND FUNCTION
ELECTRICAL CONNECTION DIAGRAM
CONTROL BOX CONNECTION INFORMATION
625 SERIES LEVELING SYSTEM
MASTER RELAY CONTROL - SWITCHED +12
3000 LB PRESSURE SWITCH - SWITCHED GROUND
50 LB PRESSURE SWITCH - SWITCHED GROUND
SWITCHED +12 FOR TRAVEL
SWITCHED +12 FOR LEFT FRONT SOLENOID VALVE
GROUND FOR RIGHT FRONT SOLENOID VALVE
GROUND FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
GROUND FROM HWH GROUND STUD
+12 BATTERY FROM MASTER RELAY
PIN 1
PIN 4
WIRE
PIN 8
PIN 1
6800
6100
6230
6800
8100
8101
1400
8500
9301
NUMBER
PIN 12
PIN 1
7601
3400
4400
7600
COLOR
WIRE
BLACK
BLACK
BLACK
12 PIN BROWN CONNECTOR
4 PIN GRAY CONNECTOR
WHITE
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
1
4
2
3
5
9
7
8
6
PIN #
1
2
3
4 RED
GRAY
4 PIN
12 PIN
BLACK
BLACK
12 PIN
8 PIN
BROWN
PIN 1
PIN 12
GRAY
12 PIN
SWITCHED GROUND FROM LEFT REAR WARNING SWITCH
SWITCHED GROUND FROM RIGHT REAR WARNING SWITCH
SHARED GROUND FOR WARNING SWITCHES
SWITCHED GROUND FROM LEFT REAR PRESSURE SWITCH
MP85.186E
SWITCHED +12 FOR TRAVEL
+12 ACCESSORY / IGNITION
SWITCHED +12 FOR RIGHT FRONT SOLENOID VALVE
SWITCHED GROUND FROM RIGHT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT WARNING SWITCH
SWITCHED GROUND FROM LEFT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT FRONT PRESSURE SWITCH
SWITCHED GROUND FROM RIGHT REAR PRESSURE SWITCH
PUMP RELAY CONTROL - SWITCHED +12
SWITCHED GROUND FROM PARK BRAKE SWITCH
BUZZER & MASTER WARNING LIGHT CONTROL - SWITCHED GROUND
MASTER RELAY CONTROL - SWITCHED +12
3000 LB PRESSURE SWITCH - SWITCHED GROUND
50 LB PRESSURE SWITCH - SWITCHED GROUND
SWITCHED +12 FOR LEFT FRONT SOLENOID VALVE
GROUND FOR RIGHT FRONT SOLENOID VALVE
GROUND FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12 FOR LEFT REAR SOLENOID VALVE
SWITCHED +12 FOR RIGHT REAR SOLENOID VALVE
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
SWITCHED +12V BATTERY POWER FROM MASTER RELAY
GROUND FROM HWH GROUND STUD
+12 BATTERY FROM MASTER RELAY
3000
4000
6235
BLACK
BLACK
WHITE
MP85.6031
9
10
11
12 NO CONNECTION
6800
6100
6230
6800
8100
8101
8500
2400
9300
8600
1400
7601
3400
4400
7600
9301
9000
6230
6800
7699
4200
2000
1000
1200
2200
3200
6120
7 BLACK
WHITE
BLACK
8 PIN BLACK CONNECTOR
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
GREEN
YELLOW
12 PIN GRAY CONNECTOR
1 AND 2
4
5
6
7
8
3
8
7
1 AND 2
8 THRU 10
4
3
12
11
6
5
RED
RED
BLACK
BLACK
WHITE
BLACK
BLACK
BLACK
12 PIN BROWN CONNECTOR
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
12 PIN BLACK CONNECTOR
5
1 THRU 6
9
7
8
6
10
11
12
1
2
3
1
2
3
4
4
RED
SWITCHED BATTERY
NO CONNECTION
NO CONNECTION
NO CONNECTION
CAN LOW
CAN HIGH
NO CONNECTION
CAN SHIELD
GROUND
NO CONNECTION
SWITCHED +12 FOR DUMP
13AUG07
MP85.186E
ELECTRICAL CONNECTION DIAGRAM
CONTROL BOX CONNECTION INFORMATION
625 SERIES LEVELING SYSTEM
PIN 1
PIN 12
WIRE DESCRIPTION AND FUNCTION
PIN 1
PIN 4
WIRE
PIN 8
PIN 1
PIN 12
NUMBER
PIN 1
4 PIN GRAY CONNECTOR
COLOR
WIRE
PIN #
4 PIN
GRAY
BLACK
8 PIN
BLACK
12 PIN
12 PIN
BROWN
PIN 1
PIN 12
GRAY
12 PIN
THE NEGATIVE SIGNAL FOR THE WARNING INDICATORS MUST ALWAYS COME FROM THE CONTROL BOX.
CONTROL BOX, THE SYSTEM MAY BE OPERATED IN ACCESSORY WITHOUT THE BUZZER SOUNDING.
NOTE: BY SUPPLYING IGNITION POWER TO THE WARNING BUZZER AND LIGHT, AND "ACC" POWER TO THE
STRAIGHT-ACTING JACKS A WARNING BUZZER MUST BE USED.
A MASTER WARNING INDICATOR SHOULD ALWAYS BE USED. WHEN THE LEVELING SYSTEM HAS
FUSE HOLDER - 6121
MP85.304R
CONTROL
BUZZER
CONTROL
WARN LIGHT
7699
LIGHT
DOWN
61116111 7699
PIGTAIL PROVIDED - 7699
+
_
BUZZER
7699
625 SERIES LEVELING SYSTEM
MANUAL LEVELING SYSTEMS
MASTER LIGHT/BUZZER CONNECTION DIAGRAM
+12 VOLT IGNITION "ON" POWER
CONNECT THIS END TO
5-15 AMP FUSE
JACK
IGNITION
PIGTAIL W/DIODE
AND IN-LINE INFORMATION
CONNECTION
SEE CONTROL BOX
the buzzer, their connections or the ignition power
to the light and buzzer.
The problem is most likely the control box
Unplug the 12 pin

MI91.1260
19MAY08
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
PART 13. ONE OR MORE JACKS WILL NOT RETRACT WHEN A DOWN ARROW (RETRACT)
BUTTON IS PUSHED. SOME JACKS WILL RETRACT.
1.
a. If the jack will not retract, the problem is the hose, velocity valve (if so equipped)
The pump should not run when a DOWN ARROW is pushed. If a pump runs when
a DOWN ARROW is pushed, the control box or touch panel is the problem.
2. Open the valve release nuts (small valve - 4 1/2 complete turns;
large valve - 1 complete turn) or the valve release T-handle (large
or the jack. Slowly remove the hose from the jack. If the jack does not retract,
replace the jack. If the jack starts to retract, tighten the hose and loosen the hose
at the manifold. If the jack does not retract, there is a problem with the hose, such
as a kink. If the jack retracts and the manifold is equipped with a velocity valve,
the valve is most likely the problem. If there is no velocity valve, there may be a
check valve or solenoid valve problem. Contact HWH technical service.
3. If the jack retracts when the valve is manually opened, the control box is most likely
the problem. If the jack will extend, the valve and it’s connection to the control box
a. Check the yellow and red LEDs for the jack that is not retracting. If the yellow LED
is not coming on while the down arrow is being pushed, replace the control box.
If the yellow LED is coming on, review PART 11, 1b and 1c. If a jack will extend,
the solenoid valve and wiring should be OK when pushing a DOWN ARROW also.
REMEMBER LOW VOLTAGE WILL CAUSE PROBLEMS.
CAUTION: DO NOT CRAWL UNDER ANY VEHICLE SUPPORTED ON THE LEVELING
JACKS WITHOUT PROPERLY SUPPORTING THE FRAME OF THE VEHICLE
SO IT CANNOT DROP WHEN THE FLUID IS RELEASED FROM A JACK.
PART 14. NO JACKS WILL RETRACT WHEN PUSHING ANY OF THE DOWN ARROW (RETRACT) BUTTONS.
1. Check the yellow and red LEDs for the solenoid valves while pushing the DOWN
ARROW buttons. If the yellow LEDs are not coming on, the problem is the control
box or touch panel. If the red LEDs are not coming on, the master relay may have a
problem, refer to PART 7. If the yellow and red LEDs are coming on, the problem is
most likely the shuttle valve. Open the valve release nut (small valve - 4 1/2 complete
turns; large valve - 1 complete turn) or the valve release T-handle (large valve -
approximately 5 full turns counter-clockwise). If the jacks retract, the problem is
the solenoid valves or their connections. If the jacks do not retract, replace the
NOTE: Remember yellow LEDs 19 and 20 should be on whenever the touch panel is on
except during the automatic retract mode. If LED 19 is not on, the right rear solenoid
valve will not function. If LED 20 is not on, the right front solenoid valve will not function.
SEE: MP65.600C
SEE: MP65.600C
SEE: MP85.184J
SEE: MP85.184J & MP65.600C
SEE: MP85.184J
PART 15. A JACK RED WARNING LIGHT WILL NOT GO OUT
1. Check the yellow LED for the proper warning switch input in the control box. Number 21
is for the left front jack, 22 is for the right front jack, 23 is for the right rear jack and 24 is
for the left rear jack. If the warning switch LED is not on, replace the control box.
SEE: MP85.184J
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
A LIT RED LED INDICATES THERE IS
(ROOM EXTENSION MANIFOLD NOT SHOWN)
MP65.600C
3000 PSI
PRESSURE
SWITCH
REAR
LEFT
ASSEMBLY
PUMP/MANIFOLD
VELOCITY VALVE
23FEB04
MP65.600C
RIGHT
REAR
LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
MP85.184J
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
625 SERIES LEVELING SYSTEM
(WITH 4 STRAIGHT-ACTING JACKS)
HYDRAULIC LINE CONNECTION DIAGRAM
RETRACTION IN OPERATOR’S INSTRUCTIONS.
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
RR
BREATHER
RELEASE
WITH VELOCITY
ARE EQUIPPED
NOTE: SOME
MANIFOLDS
VALVE
VALVES
NUTS
LEFT
FRONT
CAP
LF
LR RF
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
OR CONNECTION CABLE
4-PIN CONNECTOR.
IF A YELLOW LED IS LIT AND THE
SYSTEMS.
FRONT
RIGHT
RELEASE
"T" HANDLES
PRESSURE
SHUTTLE
SWITCH
50 PSI
VALVE
VALVE
THIS MANIFOLD
13AUG07
MP85.184J
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
5-YELLOW
31
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
PIN 1 27
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
LEFT SIDE
GROUND
+12V
REAR
FRONT
RIGHT SIDE
28
39
SENSING UNIT
FUSE
LED
DUMP
12
11
25
24
26
21
23
22 29 30
RELAY RELAY MASTER
F7
F6
14
13
PUMP
TRAVEL
17
18
15
16
F8
3836 37
38-RED
39-RED
37-RED
34-RED
36-RED
35-RED
33-GREEN
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
3532 3433
F10
F9
17-YELLOW
24-YELLOW
25-RED
26-RED
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
18-RED
PF4PF3
14-RED
15-YELLOW
16-RED
13-YELLOW
11-YELLOW
7-YELLOW
12-RED
8-RED
6-RED
LEFT
F1
RIGHT
1
2
REAR
F2
3
4
REAR LEFT
CRX2
FRONT
19
RIGHT FRONT
7
8
5
6
F3
CRX1
F4
20
2-RED
3-YELLOW
4-RED
1-YELLOW
LED
RIGHT FRONT COIL
F7 - 5 AMP
F9 - 5 AMP
F8 - 5 AMP
F10 - 10 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
JACK INTERRUPT
MASTER WARNING
ACCESSORY OUT FOR
RIGHT REAR PRESS SW
50 LB PRESS SW INPUT
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
NOT USED
NOT USED
PF4
MASTER RELAY OUTPUT
LEFT FRONT PRESS SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT FRONT PRESS SW
LEFT FRONT COIL
MASTER RELAY COIL
LEFT FRONT OUTPUT
RIGHT FRONT OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
CRX 2
CRX 1
PUMP COIL
PUMP OUTPUT
DUMP OUTPUT
DUMP COIL
FUSE
F1 - 15 AMP
F2 - 15 AMP
RIGHT REAR COIL
RIGHT REAR OUTPUT
RELAY DESCRIPTION
LEFT REAR OUTPUT
LEFT REAR COIL
valve - approximately 5 full turns counter-clockwise).
should be OK.
shuttle valve. IMPORTANT: Do not remove the shuttle valve until all solenoid
valves are closed, electrically or manually.
If either LED 19 or 20 is not on, replace the control box.
RIGHT FRONT OUTPUT F3- 15 AMP6-RED
LED
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
MP85.184J
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
LATER LED’S 3 AND 19 WILL TURN OFF.
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IF A YELLOW LED IS LIT AND THE
4-PIN CONNECTOR.
OR CONNECTION CABLE SYSTEMS.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
31
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
28
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
RIGHT SIDE
FRONT
REAR
GROUND
LEFT SIDE
+12V
39
SENSING UNIT
PIN 1
FUSE
12
11
DUMP
27
22
23
21
26
24
25
3029
RELAY
14
13
F6
F7 MASTER
RELAY
16
F8
15 18
17
TRAVEL
PUMP
383736
38-RED
39-RED
28-RED
37-RED
32-RED
30-YELLOW
31-GREEN
33-GREEN
35-RED
36-RED
34-RED
29-RED
33 3432 35
F10
F9
18-RED
19-YELLOW
27-RED
20-YELLOW
21-YELLOW
22-YELLOW
23-YELLOW
26-RED
25-RED
24-YELLOW
PF3 PF4
7-YELLOW
17-YELLOW
8-RED
12-RED
11-YELLOW
13-YELLOW
16-RED
15-YELLOW
14-RED
MP85.184J
13AUG07
F4 - 15 AMP
F6 - 5 AMP
F10 - 10 AMP
F8 - 5 AMP
F9 - 5 AMP
F7 - 5 AMP
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
50 LB PRESS SW INPUT
ACCESSORY OUT FOR
JACK INTERRUPT
MASTER WARNING
LINK LIGHT
ACCESSORY IN
NOT USED
PARK BRAKE
BOARD ENABLE
NOT USED
PF4
LEFT FRONT OUTPUT
MASTER RELAY COIL
LEFT FRONT COIL
MASTER RELAY OUTPUT
RIGHT REAR PRESS SW
RIGHT FRONT PRESS SW
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
LEFT FRONT PRESS SW
TRAVEL OUTPUT
CRX 2
CRX 1
TRAVEL COIL
DUMP COIL
DUMP OUTPUT
PUMP OUTPUT
PUMP COIL
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT REAR
2
1
RIGHT LEFT REAR
4
3
F2
F1
19
FRONT
CRX2
F3
6
5
8
7
FRONT RIGHT
20
F4
CRX1
5-YELLOW
1-YELLOW
4-RED
3-YELLOW
2-RED
LED
F2 - 15 AMP
F1 - 15 AMP
FUSE
RIGHT FRONT COIL
LEFT REAR OUTPUT
RELAY DESCRIPTION
RIGHT REAR OUTPUT
RIGHT REAR COIL
LEFT REAR COIL
WHEN THE JACK IS FULLY RETRACTED.
ASSEMBLY
(ROOM EXTENSION MANIFOLD NOT SHOWN)
MP65.600C
SWITCH
LEFT
REAR
VELOCITY VALVE
23FEB04
MP65.600C
RIGHT
REAR
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
625 SERIES LEVELING SYSTEM
(WITH 4 STRAIGHT-ACTING JACKS)
HYDRAULIC LINE CONNECTION DIAGRAM
RETRACTION IN OPERATOR’S INSTRUCTIONS.
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
RR
BREATHER
RELEASE
WITH VELOCITY
ARE EQUIPPED
NOTE: SOME
MANIFOLDS
3000 PSI
PRESSURE
VALVES
LEFT
FRONT VALVE
NUTS
CAP
LF
PUMP/MANIFOLD
LR RF
FRONT
RIGHT
PRESSURE
SHUTTLE
VALVE
SWITCH
50 PSI
"T" HANDLES
RELEASE
VALVE
THIS MANIFOLD
NOTE: Make sure the white wires of the harness and warning switch are in the "A"
pins of the Packard connectors. The black wires must be in the "B" pins of
the connectors.

MI91.1265
10SEP07
625 TROUBLE SHOOTING STEPS
MANUAL OPERATION
PART 16. THE YELLOW LEVEL INDICATORS ON THE TOUCH PANEL
1. The yellow lights do not correspond to the position of the vehicle, such as the right
a. There are four yellow LEDs on the sensing unit board. These LEDs should correspond to the yellow level
A lit yellow level light indicates that side or end is low. When all of the yellow lights are out, the vehicle should be
level. One or two yellow lights may be on at one time but opposing yellow lights should never be on. The sensing
unit is located in the control box. Because the control box can be mounted with the clear Plexiglas cover pointing
in any of four directions, the sensing unit must be programmed for direction and also the type of suspension, air or
spring. Most systems that are installed by the vehicle manufacturer have a preprogrammed sensing unit. After
market systems will most likely have a programmable sensing unit. Replacement control boxes will usually be a
generic type with a programmable sensing unit. Replacement sensing units will be programmable. When replacing
a control box or sensing unit, refer to instruction sheet ML31215 for detailed instructions for programming the
side of the vehicle is low but the left side yellow level indicator light is on.
indicators on the touch panel. If they do not, the sensing unit is not programmed properly. If the sensing
unit is programmable, reprogram the sensing unit. If the sensing unit is not programmable, the position
of the complete power unit assembly will have to be changed. If this is not reasonable to do, the sensing
unit will have to be replaced with a programmable one.
b. If the sensing unit LEDs and the touch panel lights correspond, the sensing unit
may be out of adjustment. There is an adjustment nut and screw on the outside
of the control box for the sensing unit. Refer to the maintenance sheet for sensing
unit adjustment procedures. Minor, gentile movement of the adjustment nut and
screw work best.
2. No yellow level indicators on the touch panel will come on. The yellow LEDs on the
sensing unit board are NOT working.
a. Unplug the sensing unit. Use a test light to check pin 1 on the board for +12 volts
and pin 6 for a ground. If these pins are OK, replace the sensing unit. If either pin
is not working, replace the control box.
3. No yellow level indicators on the touch panel will come on. The yellow LEDs on the
sensing unit board ARE working.
a. Unplug the sensing unit. Use a test light to ground pins 2 (rear), 3 (right side),
4 (front) and 5 (left side). If the appropriate yellow lights onthe touch panel come
on, replace the sensing unit. If the appropriate yellow lights do not come on,
replace the control box.
4. Yellow level indicator lights on the touch panel will not go out or opposing yellow
indicator lights are on.
a. Compare the yellow LEDs on the sensing unit board to the yellow indicators on the
touch panel. If the LEDs on the sensing unit board match the yellow level lights on
the touch panel, replace the sensing unit. If the LEDs on the sensing unit board
DO NOT match the yellow lights on the touch panel, replace the control box.
SEE: MI91.1155 & MP85.6148
SEE: MP85.6148
SEE: MI91.1155 & MP85.6148
PART 15. Continued. . .
SEE: MP85.091C
replace the control box. If the LED goes out, the warning switch wire(s) for the LED(s)
the 12 pin gray connector from the back of the control box. If the LED remains on,
customer service. If the LED stays on with the warning switch unplugged, unplug
in the jack may be bad. If a new switch does not fix the problem, contact HWH
lit LED. If the LED(s) go out, the problem is the warning switch. NOTE: The magnet
2. If a warning switch LED is on, unplug the warning switch for the jack(s) that have a
that are on are shorted to ground.
MP85.091C
STUD
WARNING
SWITCH
PILOT AIR DUMP
6235
LEFT REAR 4000
4200
9300
6231
6230
9301
PRESSURE
SWITCH
AB
CONNECTION
CA
B
6231
9300
9301
6230
RIGHT REAR
MP85.091C
08AUG07
3000 6235 3200
PRESSURE
SWITCH
SWITCH
WARNING
AB
ELECTRICAL CONNECTION DIAGRAM
625 SERIES SINGLE STEP LEVELING SYSTEM
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
WARNING
SWITCH
PRESSURE
6111
BUZZER
TO HWH
GROUND
6111
PARK BRAKE
SWITCH
DIODE
7699
DIODE
+
7699
7699
WARNING
MASTER
LIGHT
LEFT FRONT
6110
5AMP
FUSE
1200
SWITCH
1000
AB
6235
9001 - TO
PARK BRAKE
LIGHT
9000
_
9000
7699
NOTIN
TRAVEL
BRAKE
SLOPE
EXCESS
HWH COMPUTERIZED LEVELING
TOUCH PANEL
CAUTION!
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
TO IGNITION
TO ACCESSORY
6120
AUTO
LEVEL
STORE
AUTO
EMERGENCY
STOP MODE
PARK/
R
RETRACT
EXTEND
MANUAL
RETRACT
EXTEND
RIGHT FRONT
PILOT DUMP
CONNECTION
DIAGRAM - 625 SERIES
MANIFOLD - PUMP AND
MASTER RELAYS
LEVELING SYSTEM - LEVELING
GRAY
4 PIN
12 PIN
BLACK
8 PIN
12 PIN
BLACK
BROWN
12 PIN
GREEN
12 PIN
GRAY
PRESSURE
SWITCH
6235
SEE ELECTRICAL CONNECTION
6230 - 6231
9301
9300
WARNING
SWITCH
2000
2200
BY OEM
AB
sensing unit. No special tools are needed.
ARE NOT FUNCTIONING PROPERLY.
Indicator light
"EXCESS SLOPE"
UNDERSTANDOPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELYBEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH COMPUTERIZEDLEVELING
EXTEND
RETRACT
COMPUTER-CONTROL
625S SERIES LEVELING SYSTEM
CONTROL IDENTIFICATION
CONTROL FUNCTIONS
Manual button
dumping air from the vehicle suspension.
"MANUAL DUMP" BUTTON:
the automatic store function.
STORE INDICATOR LIGHT:
during the automatic leveling function.
AUTO LEVEL INDICATOR LIGHT:
INDICATOR LIGHTS
button is being pushed.
start the automatic leveling function.
will retract their respective jack pairs to lower the vehicle.
extend their respective jack pairs to lift the vehicle.
RETRACT BUTTONS (DOWN ARROWS):
EXTEND BUTTONS (UP ARROWS):
CONTROL BUTTONS
when the hand/auto brake is not set and the "AUTO LEVEL"
"NOT IN PARK/BRAKE" LIGHT:
four jacks at the same time.
"AUTO STORE" BUTTON:
"AUTO LEVEL" BUTTON:
any leveling system operation.
"EMERGENCY STOP" BUTTON:
This light will flash during
This light will flash
This indicator will light
This is a manual button for
Push this button any time to
These buttons will
Push this button to retract all
Push this button to stop
These buttons
"AUTO STORE"
AUTO LEVEL
Indicator light
Indicator light
"TRAVEL MODE"
Indicator light
Indicator light
"NOT IN PARK"
CANCEL Button
AUTO LEVEL/STORE
"AUTO LEVEL"
Button
STORE
Button
LOWER LEFT SIDE
Manual button
RAISE LEFT SIDE
STOP CAUTION!
DUMP
MANUAL
EMERGENCY
LEVEL
AUTO
STORE
AUTO
PARK/
NOTIN
MODE
BRAKE
TRAVEL
SLOPE
EXCESS
R
"MANUAL DUMP"
Button
HYDRAULIC LEVELING FOR DETAILED EXPLANATION.
level. SEE OPERATOR’S PROCEDURES - AUTOMATIC
When all four yellow LEVEL lights are out, the vehicle is
It will be on when any one or more jacks are extended
or "ACC" position, the system is on, and the jacks are
They are functional only when the ignition is in the "ON"
yellow level indicators are jacks down WARNING lights.
The four red lights surrounding the
No more than two lights should be on at the same time.
indicates that its side, end, or corner of the vehicle is low.
level sensing indicators. When a yellow light is on, it
The four yellow indicating lights are
This indicator light will be on
This indicator will light when
INDICATOR LIGHTS (CONTINUED)
light mounted in the dash separate from the touch panel.
MASTER "JACKS DOWN" WARNING LIGHT:
when the ignition is on, when the jacks are retracted and
the leveling system cannot level the vehicle.
It will sound if the master "JACKS DOWN"
This is a jacks down warning.
and the ignition is "ON".
there are no red WARNING lights on.
"TRAVEL MODE" LIGHT:
BUZZER:
warning light is on.
extended 1/4 to 1/2 inch.
LEVELING LIGHTS:
"EXCESS SLOPE" LIGHT:
WARNING LIGHTS:
10AUG07
MI91.1155
This is a
Manual button
LOWER REAR
Manual button
RAISE REAR
(4) yellow
Indicator light
LEVEL SENSING
Manual button
LOWER RIGHT SIDE
Manual button
RAISE RIGHT SIDE
Indicator light
JACK DOWN
Manual button
RAISE FRONT
Manual button
LOWER FRONT
MANUAL
RETRACT
EXTEND (4) red
ADJUSTMENT
NUT (7/8" or 3/4")
ADJUSTMENT NUT
MAY BE DIFFERENT
LED’S - LOCATION
ADJUSTMENT SCREW
SENSING UNIT ADJUSTMENT
MAINTENANCE/SERVICE
adjustments first, then hold the adjustment nut from moving
while making the A-C adjustment.
TOP VIEW - SENSING UNIT
NUT
MP45.271M
ADJUSTMENT
BOX WALL
CONTROL
BD
C
A
wrench and a philips screw driver will be needed.
needed. A 7/8", 3/4" or 5/16" socket w/driver or box end
Touch Panel, manual adjustments to the Sensing Unit are
properly adjusted. If there are yellow LEVEL lights lit on the
are no yellow lights lit on the Touch Panel, the sensing unit is
With the vehicle level according to the bubble level, if there
Control Box. If two LED’s are on, it is best to make the B-D
be a problem with the Sensing Unit or the mounting of the
be turned more than 3/4 turn to turn the LED out, there may
to be turned more than 1/2 flat or the adjustment screw has to
screw will turn out LED’s A and C. If the adjustment nut has
the adjustment nut to turn out LED’s B and D. The adjustment
to the drawing below. The Sensing Unit is adjusted by turning
There are four LED’s on the Sensing Unit, A,B,C and D. Refer
Control Box is mounted to the power unit/valve assembly.
The Sensing Unit is mounted inside the Control Box. The
level the vehicle until the bubble is centered.
level, ignoring the yellow LEVEL lights on the Touch Panel,
that is to be level. Using the Leveling System and the bubble
the freezer floor or upon whichever surface within the vehicle
Level the vehicle by placing a bubble level in the center of
the vehicle, the front is still low. This means the front
"tweaking" process until the system levels the vehicle
touch panel. Recheck with a level. Repeat the
relevel the vehicle using the yellow level lights on the
the front up more. Again, unlevel the vehicle then
the front yellow light to stay on slightly longer to bring
instructions for LED’s A, B, C, and D. This will allow
the OPPOSITE direction that is given in the above
Move the adjustment for that light very, very, slightly in
which sensing unit light is the front light, A-B-C or D.
yellow level light is turning off too soon. Determine
SIDE VIEW - CONTROL BOX
SCREW (Phillips or 1/4")
ADJUSTMENT
properly.
NUT (5/16")
ADJUSTMENT
MP85.6148
19FEB07
Example: After the initial adjustment and releveling
sensing unit, ignoring the LED’s on the sensing unit.
yellow level lights go out, instead just "tweak" the
needed, DO NOT try to adjust the sensing unit until the
LEVEL lights. Recheck the level. If more adjustment is
lights are on. Level the vehicle according to the yellow
vehicle to an unlevel position so one or two yellow
IMPORTANT: When all 4 LED’s are off, move the
If LED (D) is lit: Turn the adjustment nut CLOCKWISE
If LED (B) is lit: Turn the adjustment nut COUNTER
If LED (C) is lit: Turn the adjustment screw CLOCKWISE
If LED (A) is lit: Turn the adjustment screw COUNTER
NOTE: If opposing LED’s are lit, there is a problem with
until the LED is off.
CLOCKWISE until the LED is off.
until the LED is off.
CLOCKWISE until the LED is off.
the Sensing Unit.
MI91.1155
MP85.6148
IMPORTANT: The sensing unit has an accuracy tolerance of
± 1 inch side to side and 5.4 inches front to rear on a 36’ vehicle.

MI91.127
0
01SEP1
5
625 TROUBLE SHOOTING STEPS
AUTOMATIC LEVELING
It is assumed at this point the different components of the leveling system are all functioning properly in the manual
mode. It is also assumed the level sensing unit is properly adjusted with the yellow level indicator lights on the touch
panel off and the vehicle level.
1. With the ignition on (or in ACC.) push the "AUTO LEVEL" button. The AUTO LEVEL light will flash.
2. If the vehicle is equipped with an air suspension, the air will start to dump at this time.
The air will dump for approximately 25 seconds before the leveling sequence starts.
3. The pump will come on and the system will start to extend jacks to level the vehicle.
The system will start by extending jacks to turn a lit side yellow level indicator off first.
4. The appropriate red jack down warning light on the touch panel will come on as the jacks extend 1/4 to 1/2 inch.
If the ignition is in the ON position, the master warning light and buzzer will come on.
5. The system will extend jacks as necessary until the yellow level lights are all off. When all of the level lights
are off, there will be a short (2 seconds) pause before the system goes into the stabilize mode. Once in the
stabilization mode, yellow level lights will not come back on.
6. STABILIZE MODE: Stabilize mode is when any jack not used to level the vehicle is extended to the ground.
Jacks that are used to stabilize the vehicle should lift the vehicle between 1/4 and 3/4 inch after the jack touches
the ground. Each jack has a pressure switch mounted on it. The pressure switch is a normally open, one
wire switch. The switch closes when the jack touches the ground and lifts the vehicle 1/4 to 3/4 inch.
NOTE: If either pressure switch for the front jacks is not on, both front solenoid valves
will remain on until both front pressure switches are on.
7. When the system has completed the stabilize mode, the system will shut off. The red warning lights will remain
This sends a ground signal to the control box. The control box will then shut off the solenoid valve for that jack.
DIAGNOSTICS
PART 2. IF ANY PROBLEMS OCCUR DURING STEPS 2 THROUGH 6 REVIEW THE DIAGNOSTICS
1. If jacks that are stabilizing extend but don’t quite reach the ground or don’t lift enough,
a. If the red LED is not on, retry that jack manually. If the jack will extend manually but not
IN THE MANUAL OPERATION DIAGNOSTIC SECTION OF THIS MANUAL.
the pressure switch may need adjusted. Remove the rubber boot, loosen the jam nut
and turn the threaded portion clockwise 1/4 turn and retry. Repeat this as necessary.
If adjusting the switch does not work, replace the switch.
TO THE GROUND AND LIFT THE VEHICLE 1/4 TO 3/4 INCH.
PART 3. DURING THE STABILIZE MODE ONE OR MORE JACKS WILL NOT EXTEND
2. If a jack does not extend at all, check the red LED
in stabilize and the red LED is not on, replace the control box. If the jack will not extend
manually, review PART 11 of the MANUAL OPERATION diagnostic section of this manual.
b. If the red LED is on, the jack pressure switch is stuck on, the wire in the harness
is shorted to ground or the control box is bad. Unplug the pressure switch and
check the LED. If the red LED goes out, replace the pressure switch. If the red
LED is still on, unplug the 12 pin gray connector from the control box. If the red
LED goes out, the wire in the harness is shorted to ground. If the red LED stays
on, replace the control box. The pressure switch LEDs and wires are as follows:
LEFT FRONT PRESSURE SWITCH ----- LED 25 ----- WIRE 1200 ----- PIN 5
RIGHT FRONT PRESSURE SWITCH --- LED 26 ----- WIRE 2200 ----- PIN 6
RIGHT REAR PRESSURE SWITCH ----- LED 27 ----- WIRE 3200 ----- PIN 7
LEFT REAR PRESSURE SWITCH ------- LED 28 ----- WIRE 4200 ----- PIN 8
SEE: MP85.184J
SEE: MP85.091C
NOTE: Due to the "bumping" of the vehicle during the stabilize modes a
yellow level light may come on after the AUTO LEVEL light turns off.
LIGHT WILL NOT FLASH WHEN THE AUTO LEVEL BUTTON IS PUSHED. NOTHING ELSE HAPPENS.
PART 1. THE IGNITION IS IN THE "ACC" OR "ON" POSITION. THE PARK BRAKE IS SET. THE AUTO LEVEL
or control box. Remember to check voltage. Low voltage can cause erratic operation.
1. Recheck the manual buttons. If they function correctly, the problem is the touch panel
50 LB PRESS SW INPUT33-GREEN
LEFT SIDE
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
MP85.184J
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
OR CONNECTION CABLE
4-PIN CONNECTOR.
CORRESPONDING RELAY ON.
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
GROUND 39
SYSTEMS.
3836 37 34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
13AUG07
MP85.184J
F10 - 10 AMP
MASTER WARNING
ACCESSORY OUT FOR
JACK INTERRUPT
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
31
LEFT
PUMP RELAY RELAY MASTER
TRAVEL
DUMP
SENSING UNIT
+12V
REAR
FRONT
RIGHT SIDE
PIN 1
23
25
24
28
26
27
21
22 3029
RIGHT
FUSE
LED
1
2
3
F1
4
12
11
F2
REAR REAR LEFT RIGHT FRONT
CRX2
FRONT F7
F6
14
13
19
75
15
16
6
F8
17
F3
18
8
14-RED
F10
32 353433
24-YELLOW
31-GREEN
30-YELLOW
32-RED
29-RED
28-RED
27-RED
26-RED
25-RED
PF4
15-YELLOW
23-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
PF3
CRX1
F4 F9
20
2-RED
3-YELLOW
13-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
1-YELLOW
LED
F9 - 5 AMP
F8 - 5 AMP
F7 - 5 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
F1 - 15 AMP
FUSE
MASTER RELAY OUTPUT
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
RIGHT REAR PRESS SW
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
LEFT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
RIGHT REAR OUTPUT
RIGHT REAR COIL
RELAY DESCRIPTION
MASTER RELAY COIL
LEFT FRONT OUTPUT
LEFT FRONT COIL
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
in the control box for that pressure switch.
STUD
MP85.091C
PILOT AIR DUMP
SWITCH
WARNING
4000
4200
9300
LEFT REAR
9301
6230
6231
SWITCH
PRESSURE
B A
6235
CONNECTION
BA
C
6230
9301
9300
6231
08AUG07
MP85.091C
RIGHT REAR
6235 3200
SWITCH
PRESSURE
WARNING
SWITCH
3000
B A
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
625 SERIES SINGLE STEP LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
GROUND
TO HWH
BUZZER
6111
PRESSURE
SWITCH
WARNING
PARK BRAKE
6111
SWITCH
7699
DIODE
DIODE
7699
7699
+
LIGHT
MASTER
WARNING
LEFT FRONT
1200
6110
FUSE
5AMP
1000
SWITCH
B A
6235
PARK BRAKE
9001 - TO
9000
LIGHT
_
7699
9000
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
CAUTION!
TOUCH PANEL
HWH COMPUTERIZED LEVELING
EXCESS
SLOPE
BRAKE
TRAVEL
TO ACCESSORY
TO IGNITION
6120
R
PARK/
MODE
STOP
EMERGENCY
AUTO
STORE
LEVEL
AUTO
NOTIN
EXTEND
RETRACT
EXTEND
RETRACT
MANUAL
CONNECTION
PILOT DUMP
RIGHT FRONT
LEVELING SYSTEM - LEVELING
MASTER RELAYS
MANIFOLD - PUMP AND
DIAGRAM - 625 SERIES
4 PIN
GRAY
12 PIN
BLACK
12 PIN
8 PIN
BLACK
GREEN
12 PIN
BROWN
GRAY
12 PIN
SEE ELECTRICAL CONNECTION
6235
SWITCH
PRESSURE
6230 - 6231
9300
9301
SWITCH
WARNING
2000
2200
BY OEM
B A
on until the ignition is turned off. If the ignition is in the ON position, not ACC position, the master warning light
and buzzer will be on until the ignition is turned off.

MI91.127
5
01SEP1
5
625 TROUBLE SHOOTING STEPS
AUTOMATIC LEVELING
PART 4. DURING THE STABILIZING MODE ONE OR MORE JACKS LIFTS THE VEHICLE TO HIGH.
1. If a jack lifts the vehicle more than 3/4 inch but does not extend completely, the pressure
a. If the red LEDs for the front pressure switches are on and the front jacks continue
switch may need to be adjusted. Remove the rubber boot, loosen the jam nut and turn
the threaded portion counterclockwise 1/4 turn and retry. Repeat as necessary. If
adjusting the switch does not work, replace the pressure switch.
2. If a jack continues to extend and the pump will not shut off, check the red LED in the
control box for that pressure switch.
NOTE: If both red LEDs for the front pressure switches are not on,
both front jacks will continue to extend.
to extend, replace the control box. If a rear pressure switch LED is on and it’s jack
continues to extend, replace the control box.
b. If a jack is on the ground lifting the vehicle and it’s pressure switch LED is not on, the
pressure switch is bad, the wire is bad or the control box is the problem. Unplug the
pressure switch and ground the harness pin for that wire. If the red LED comes on,
replace the pressure switch. If the red LED does not come on, unplug the 12 pin gray
connector from the control box. Ground the appropriate pin in the box receptacle.
If the LED comes on, the harness wire or it’s connections are bad. If the red LED
does not come on, replace the control box.
EXCESS SLOPE: EXCESS SLOPE IS WHEN ONE OR TWO JACKS REACH FULL EXTENSION AND
ONE OR MORE YELLOW LEVEL LIGHTS REMAIN ON. WHEN THIS HAPPENS, THE 3000# PRESSURE
SWITCH ON THE MANIFOLD CLOSES SENDING A GROUND SIGNAL TO THE CONTROL BOX. THE
PUMP WILL SHUT OFF, THE SYSTEM WILL NOT STABILIZE AND THE TOUCH PANEL WILL TURN
OFF WITH THE "EXCESS SLOPE" LIGHT REMAINING ON. THE "EXCESS SLOPE" LIGHT WILL BE
ON WHENEVER THE IGNITION IS ON UNTIL THE JACKS ARE COMPLETELY RETRACTED WITH
THE "STORE" BUTTON OR THE PARK BRAKE IS RELEASED.
1. If the system will not go EXCESS SLOPE, the pressure switch is not working, the control box
is bad, the pressure wire (8100) is bad or the pump is the problem. The green LED 31 in the
control box should be on when the 3000# pressure switch comes on.
a. Unplug the 3000# switch and ground wire 8100. If LED 31 does not come on,
unplug the 12 pin brown plug from the control box and ground pin 2 in the control
box receptacle. If LED 31 does not come on, replace the control box. If the LED
comes on, the problem is the wire 8100 or it’s connections.
b. If LED 31 comes on when wire 8100 is grounded, retry automatic leveling with wire
SEE: MP85.184J
SEE: MP85.184J & MP85.091C
SEE: MP85.102K & MP85.184J
8100 grounded. Make sure a yellow level indicator light is lit. The pump should
shut off and the "EXCESS SLOPE" light should come on several seconds after the
pump starts running. If the pump continues to run, the problem is the control box.
If the panel shows "EXCESS SLOPE" the problem is the pressure switch or the
pump pressure is not high enough. Check the pump pressure. The pressure
should be between 3300# and 3600#. If the pump pressure is to low, replace the
pump. If the pump pressure is OK, replace the 3000# pressure switch.
PF3
22
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
IF A YELLOW LED IS LIT AND THE
CORRESPONDING RELAY ON.
4-PIN CONNECTOR.
OR CONNECTION CABLE
SENSING UNIT
BOX CONNECTION INFORMATION.
FRONT
GROUND
LEFT SIDE
PIN 1
RIGHT SIDE
REAR
+12V
39
27
26
28
24
25
23
SYSTEMS.
383736
F10
32-RED
35-RED
36-RED
37-RED
39-RED
38-RED
34-RED
33-GREEN
23-YELLOW
25-RED
26-RED
27-RED
28-RED
29-RED
30-YELLOW
31-GREEN
24-YELLOW
PF4
13AUG07
F10 - 10 AMP
MP85.184J
LEFT FRONT PRESS SW
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
RIGHT REAR PRESS SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
50 LB PRESS SW INPUT
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT
NOT USED
NOT USED
PF4
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
31
FRONT
CRX2
FRONT RIGHT LEFT REAR REAR RIGHT
DUMP
LED
FUSE
2
1
F2
11
12
4
F1
3
MASTER RELAY RELAY PUMP
21 29 30
TRAVEL
19
13
14
F6
F7
8
18
F3
17
F8
6
16
15
57
1-YELLOW
CRX1
33 34 3532
20
F9
F4
13-YELLOW
16-RED
18-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
15-YELLOW
14-RED
4-RED
6-RED
8-RED
12-RED
5-YELLOW
7-YELLOW
11-YELLOW
3-YELLOW
2-RED
LED FUSE
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
RIGHT REAR COIL
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
RIGHT REAR OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
MASTER RELAY OUTPUT
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
PUMP COIL
CRX 1
CRX 2
DUMP COIL
DUMP OUTPUT
LEFT REAR COIL
RELAY DESCRIPTION
TOUCH PANEL - JACK WARNING LIGHTS AND PRESSURE SWITCHES
PILOT AIR DUMP - PARK BRAKE - MASTER WARNING LIGHT AND BUZZER
MP85.091C
TO HWH
GROUND
WARNING
SWITCH
PILOT AIR DUMP
STUD
LEFT REAR 4000
AB
4200
6235
9301
9300
6231
6230
CONNECTION
PRESSURE
SWITCH
LIGHT
CA
B
6231
9300
9301
6230
WARNING
SWITCH
PRESSURE
6111
BUZZER
FUSE
6111
PARK BRAKE
SWITCH
7699
WARNING
LIGHT
DIODE
DIODE
7699
7699
5AMP
+
LEFT FRONT
MASTER
1000
6110
AB
1200
6235
SWITCH
9001 - TO
PARK BRAKE
9000
_
6120
9000
7699
TRAVEL
BRAKE
SLOPE
EXCESS
HWH COMPUTERIZED LEVELING
TOUCH PANEL
CAUTION!
SECURELYBEFOREREMOVINGTIRES OR CRAWLING UNDER VEHICLE.
UNDERSTANDOPERATOR’SMANUALBEFORE USING. BLOCK FRAME AND TIRES
TO IGNITION
TO ACCESSORY
STORE
AUTO
EMERGENCY
STOP MODE
AUTO
LEVEL
PARK/
R
NOTIN
RETRACTRETRACT
EXTEND
MANUAL
EXTEND
RIGHT REAR
MP85.091C
08AUG07
6235
SWITCH
WARNING
3000
AB
3200
PRESSURE
SWITCH
GRAY
BLACK
8 PIN
12 PIN
GRAY
RIGHT FRONT
PILOT DUMP
CONNECTION
DIAGRAM - 625 SERIES
MANIFOLD - PUMP AND
MASTER RELAYS
LEVELING SYSTEM - LEVELING
SEE ELECTRICAL CONNECTION
4 PIN 12 PIN
BLACK
12 PIN
BROWN
12 PIN
GREEN
PRESSURE
SWITCH
6235
SWITCH
6230 - 6231
2000
9301
9300
WARNING
AB
2200
BY OEM
ELECTRICAL CONNECTION DIAGRAM
625 SERIES SINGLE STEP LEVELING SYSTEM
MP85.102K
+TO PUMP
MOTOR
#6
#7 RELAY
PUMP
#4
#5
#3
#1
8600
TO 3000 LB PRESSURE SWITCH - 8100
TO HWH GROUND STUD - 6240
PUMP
MOTOR
#9
HWH GROUND
STUD
1400
4400
6240
6240
A
B
A
B
MANIFOLD
LEVELING
P.E.D P.E.D
8500
LR
LF
TO HOUSE
14JUN05
MP85.102K
BATTERY
RELAY
MASTER
#2
#8
TOUCH PANEL
HARNESS
6800
GROUND STUD
6230 - TO HWH
GRAY
4 PIN
BLACK
8 PIN
BROWN
12 PIN
PUMP AND MASTER RELAYS
LEVELING MANIFOLD
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
TO 50 LB PRESSURE SWITCH - 8101
2400
7600
7601
3400
B B A
A
P.E.D P.E.D
LEVELING MANIFOLD
RF
RR
50 LB PRESS SW INPUT33-GREEN
LEFT SIDE
MP85.184J
THE RED LED (18) WILL NOT BE ON. THE RED LED
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
NORMALLY CLOSED RELAY. WHEN THE YELLOW
NOTE: THE TRAVEL RELAY IS WIRED AS A
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
TRAVEL MODE AND THE IGNITION IS ON.
NOTE: THE TRAVEL RELAY IS NOT USED ON
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
LATER LED’S 3 AND 19 WILL TURN OFF.
NOTE: FOR DETAILED INPUT / OUTPUT
INFORMATION ABOUT PIN CONNECTIONS SEE
ELECTRICAL CONNECTION DIAGRAM - CONTROL
IF A YELLOW LED IS NOT LIT, THERE IS A
PROBLEM WITH INPUT VOLTAGE IN THE
NO RED LED IS COMING ON THERE MAY BE
IF THE YELLOW LED’S ARE WORKING BUT
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
CORRESPONDING RED LED IS OFF, EITHER
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
A LIT RED LED INDICATES THERE IS
IS A GROUND SIGNAL TO TURN THE
NOTE: A LIT YELLOW LED INDICATES THERE
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
4-PIN CONNECTOR.
OR CONNECTION CABLE
BOX CONNECTION INFORMATION.
IF A YELLOW LED IS LIT AND THE
CORRESPONDING RELAY ON.
GROUND 39
SYSTEMS.
383736 35-RED
36-RED
37-RED
39-RED
38-RED
34-RED
F10 - 10 AMP
MP85.184J
13AUG07
JACK INTERRUPT
ACCESSORY OUT FOR
MASTER WARNING
PARK BRAKE
BOARD ENABLE
ACCESSORY IN
LINK LIGHT PF4
ELECTRICAL CONNECTION DIAGRAM
625 SERIES LEVELING SYSTEM
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
LEFT
31
TRAVEL
MASTER RELAY RELAY PUMP
DUMP
SENSING UNIT
PIN 1
RIGHT SIDE
REAR
+12V
FRONT
23
27
26
28
24
25
21
22 29 30
RIGHT
LED
FUSE
2
1
F2
11
12
4
F1
3
REAR LEFT REAR FRONT
CRX2
FRONT RIGHT
19
13
14
F6
F7
8
18
F3
17
F8
6
16
15
57
14-RED
F10
33 34 3532
25-RED
26-RED
27-RED
28-RED
29-RED
30-YELLOW
31-GREEN
24-YELLOW
32-RED
PF4
16-RED
18-RED
17-YELLOW
19-YELLOW
20-YELLOW
21-YELLOW
22-YELLOW
15-YELLOW
23-YELLOW
PF3
CRX1
20
F9
F4
2-RED
4-RED
6-RED
8-RED
12-RED
5-YELLOW
7-YELLOW
11-YELLOW
3-YELLOW
13-YELLOW
1-YELLOW
LED FUSE
F1 - 15 AMP
F2 - 15 AMP
F3 - 15 AMP
F4 - 15 AMP
F6 - 5 AMP
F7 - 5 AMP
F8 - 5 AMP
F9 - 5 AMP
MASTER RELAY OUTPUT
LEFT FRONT WARN SW
RIGHT FRONT WARN SW
LEFT FRONT PRESS SW
RIGHT FRONT PRESS SW
LEFT REAR PRESS SW
3000 LB PRESS SW INPUT
MASTER WARN CONTROL
RIGHT REAR PRESS SW
RIGHT REAR WARN SW
LEFT REAR WARN SW
NOT USED
NOT USED
PUMP OUTPUT
TRAVEL COIL
TRAVEL OUTPUT
PUMP COIL
CRX 1
CRX 2
RELAY DESCRIPTION
LEFT REAR OUTPUT
RIGHT FRONT COIL
RIGHT FRONT OUTPUT
LEFT FRONT COIL
LEFT FRONT OUTPUT
MASTER RELAY COIL
RIGHT REAR OUTPUT
RIGHT REAR COIL
DUMP COIL
DUMP OUTPUT
LEFT REAR COIL
SEE: MP85.102K & MP85.184J & MP65.600C
MP65.600C
NOTE: BEFORE OPERATING ANY MANUAL VALVE RELEASE
READ AND UNDERSTAND PROCEDURE FOR MANUAL JACK
RETRACTION IN OPERATOR’S INSTRUCTIONS.
HYDRAULIC LINE CONNECTION DIAGRAM
(WITH 4 STRAIGHT-ACTING JACKS)
625 SERIES LEVELING SYSTEM
VELOCITY VALVE
(ROOM EXTENSION MANIFOLD NOT SHOWN)
"T"-HANDLES AND (2) SMALL VALVES THAT HAVE VALVE RELEASE
NUTS. SOME MANIFOLDS WILL HAVE (4) LARGE VALVES AND
SOME MANIFOLDS WILL HAVE (4) SMALL VALVES.
IS SHOWN WITH (2) LARGE VALVES THAT HAVE VALVE RELEASE
MP65.2802
LEFT
REAR
SWITCH
PRESSURE
3000 PSI
CHECK PUMP
MANIFOLDS
VALVES
PRESSURE
NOTE: SOME
ARE EQUIPPED
WITH VELOCITY
HERE
LR
LEFT
FRONT
CAP
VALVE
RELEASE
NUTS
BREATHER
08AUG06
50 PSI
SWITCH
PRESSURE
PUMP/MANIFOLD
ASSEMBLY
LF RF RR
REAR
RIGHT
MP65.600C
625 MANIFOLDS.
BE USED ON ALL
SWITCH MAY NOT
PRESSURE
NOTE: 50 PSI
SHUTTLE
VALVE
THIS MANIFOLD
RELEASE
VALVE
"T" HANDLES
RIGHT
FRONT

MI91.1280
24MAR09
625 TROUBLE SHOOTING STEPS
SERIES/PARALLEL OPERATION OF SOLENOID VALVES
DIAGNOSTICS FOR THE AUTOMATIC STORE SEQUENCE
During manual leveling, manual retract and automatic leveling, the solenoid valves are operated independently of each other.
That is, each valve has its own ground and switched +12 volts. The ground wires for the right front (7600) and right rear (7601)
solenoid valves are routed to the control box and through CRX1 (7600) and CRX2 (7601) to ground. The ground wires for the
left front and left rear are white wires that are attached to the ground stud on the side of the pump. When the "STORE" button
is pushed, the solenoid valves for the two front jacks are turned on first. The solenoid valves for the rear jacks are turned on
five (5) seconds later.
Two (2) seconds after the front valves are turned on, the left front relay (LED 7) is turned off along with the CRX1 relay
(LED 20). Current is routed through the right front valve coil, back to the control box on wire 7600, out to the left front
valve, then through the left front valve coil to find a ground at the ground stud. The two front valves are now wired in
series. Five (5) seconds after the front valves are turned on, the two rear valves are turned on. Two (2) seconds after
the two rear valves are turned on, the left rear relay (LED 3) is turned off along with the CRX2 relay (LED 19). Current
is routed through the right rear valve coil, back to the control box, out to the left rear valve on wire 7601, then through
the left rear valve coil to find a ground at the ground stud. The two rear valves are now wired in series. Approximately
seven (7) seconds after the "STORE’ button is pushed, the two front valves are operating in series and the two rear
valves are operating in series. When checking voltage at the solenoid valves in the automatic STORE mode, seven (7)
seconds after the "STORE" button is pushed, the voltage to each valve should be in the 5 to 6 volt range.
The proper sequence of the LEDs for the four valve relays along with CRX1 and CRX2 is as follows:
1. Push "STORE", LEDs 5, 6, 7, 8, 19 and 20 will come on.
2. Two (2) seconds later, LEDs 7 and 20 will turn off.
3. Three (3) seconds later, LEDs 1, 2, 3 and 4 will turn on.
4. Two (2) seconds later, LEDs 3 and 19 will turn off.
PART 1. ONE OR MORE JACKS WILL NOT RETRACT AFTER THE "STORE" BUTTON IS PUSHED.
1. If at least one jack retracts properly but others will not review PART 15 of the manual operation section.
2. If no jacks will retract, review PART 16 of the manual operation section.
PART 2. THE LEFT FRONT OR THE LEFT REAR START TO RETRACT BUT STOP AFTER SEVERAL
SECONDS. THEY RETRACT PROPERLY IN THE MANUAL MODE.
2. If the left rear jack starts to retract but stops, replace the right rear solenoid valve.
1. If the left front jack starts to retract but stops, replace the right front solenoid valve.
WHEN THE JACKS ARE FULLY RETRACTED.
PART 3. ONE OR MORE RED WARNING LIGHTS ON THE TOUCH PANEL WILL NOT TURN OFF
1. Review PART 15 of the manual operation section.
SEE: MP85.184J
then the system will turn off. The "TRAVEL MODE" light will not be on.
will stay in the STORE mode for thirty (30) minutes from the time the "STORE" button was pushed
NOTE: If one or more jacks will not retract and/or a red jack down warning light will not go out, the system
7. Six minutes after the last red warning light goes out, the touch panel will turn off.
6. The red warning lights on the touch panel will go out as each jack retracts within 1/4 to 1/2 inch.
5. Five (5) seconds later the rear jacks will start to retract.
and buzzer will be on while the jacks are retracting.
1. The ignition must be in the ON or ACC. position. If the ignition is in the ON position, the master warning light
AUTOMATIC STORE (RETRACT) SEQUENCE
4. The two front jacks will start to retract.
2. Push the "STORE" button.
50 LB PRESS SW INPUT33-GREEN
LEFT SIDE
LATER LED’S 3 AND 19 WILL TURN OFF.
IS PUSHED, LED’s 7 AND 20 WILL TURN OFF. 5 SECONDS
PUSHED. TWO SECONDS AFTER THE "STORE" BUTTON
TOUCH PANEL IS ON UNLESS THE "STORE" BUTTON IS
LED’S 19 AND 20 (YELLOW) WILL BE ON WHENEVER THE
IT IS ONLY USED WITH PILOT OPERATED AIR DUMP
VEHICLES EQUIPPED WITH HWH AIR DUMP SYSTEMS.
NOTE: THE TRAVEL RELAY IS NOT USED ON
TRAVEL MODE AND THE IGNITION IS ON.
WILL BE ON IF THE LEVELING SYSTEM IS IN THE
NOTE: THE TRAVEL RELAY IS WIRED AS A
NORMALLY CLOSED RELAY. WHEN THE YELLOW
LED (17) IS ON THE RELAY CONTACTS WILL OPEN.
THE RED LED (18) WILL NOT BE ON. THE RED LED
MP85.184J
PROBLEM WITH THE CONTROL BOX, TOUCH PANEL
NOTE: A LIT YELLOW LED INDICATES THERE
IS A GROUND SIGNAL TO TURN THE
A LIT RED LED INDICATES THERE IS
VOLTAGE ON IT’S CORRESPONDING OUTPUT PIN.
CORRESPONDING RED LED IS OFF, EITHER
IT’S FUSE IS BLOWN OR THE RELAY IS BAD.
IF THE YELLOW LED’S ARE WORKING BUT
NO RED LED IS COMING ON THERE MAY BE
PROBLEM WITH INPUT VOLTAGE IN THE
IF A YELLOW LED IS NOT LIT, THERE IS A
ELECTRICAL CONNECTION DIAGRAM - CONTROL
INFORMATION ABOUT PIN CONNECTIONS SEE
NOTE: FOR DETAILED INPUT / OUTPUT
OR CONNECTION CABLE
4-PIN CONNECTOR.
BOX CONNECTION INFORMATION.
CORRESPONDING RELAY ON.
IF A YELLOW LED IS LIT AND THE
GROUND 39
SYSTEMS.
3836 37 34-RED
38-RED
39-RED
37-RED
36-RED
35-RED
MP85.184J
F10 - 10 AMP
13AUG07
MASTER WARNING
ACCESSORY OUT FOR
JACK INTERRUPT
LINK LIGHT
ACCESSORY IN
BOARD ENABLE
PARK BRAKE
PF4
CONTROL BOX - LED - FUSE LOCATION AND DESCRIPTION
625 SERIES LEVELING SYSTEM
ELECTRICAL CONNECTION DIAGRAM
31
LEFT TRAVEL
PUMP RELAY RELAY MASTER
DUMP
SENSING UNIT
+12V
REAR
RIGHT SIDE
PIN 1
FRONT
23
25
24
28
26
27
21
22 3029
REAR REAR RIGHT
FUSE
LED
1
2
3
F1
4
12
11
F2
LEFT RIGHT FRONT
CRX2
FRONT F7
F6
14
13
19
75
15
16
6
F8
17
F3
18
8
14-RED
F10
32 353433
24-YELLOW
31-GREEN
30-YELLOW
29-RED
28-RED
27-RED
26-RED
25-RED
32-RED
PF4
15-YELLOW
22-YELLOW
21-YELLOW
20-YELLOW
19-YELLOW
17-YELLOW
18-RED
16-RED
23-YELLOW
PF3
CRX1
F4 F9
20
2-RED
3-YELLOW
11-YELLOW
7-YELLOW
5-YELLOW
12-RED
8-RED
6-RED
4-RED
13-YELLOW
1-YELLOW
LED
F9 - 5 AMP
F8 - 5 AMP
F7 - 5 AMP
F6 - 5 AMP
F4 - 15 AMP
F3 - 15 AMP
F2 - 15 AMP
F1 - 15 AMP
FUSE
MASTER RELAY OUTPUT
RIGHT FRONT WARN SW
LEFT FRONT WARN SW
LEFT REAR WARN SW
RIGHT REAR WARN SW
RIGHT REAR PRESS SW
MASTER WARN CONTROL
3000 LB PRESS SW INPUT
LEFT REAR PRESS SW
RIGHT FRONT PRESS SW
LEFT FRONT PRESS SW
NOT USED
NOT USED
PUMP COIL
TRAVEL OUTPUT
TRAVEL COIL
PUMP OUTPUT
CRX 2
CRX 1
RELAY DESCRIPTION
RIGHT REAR OUTPUT
MASTER RELAY COIL
LEFT FRONT OUTPUT
LEFT FRONT COIL
RIGHT FRONT OUTPUT
RIGHT FRONT COIL
LEFT REAR OUTPUT
RIGHT REAR COIL
LEFT REAR COIL
DUMP OUTPUT
DUMP COIL
NOTE: The "STORE" button should function with the
park brake released.
3. If the vehicle is equipped with an air suspension, the suspension should return to ride height at this time.

MI91.1285
17APR09
625 TROUBLE SHOOTING STEPS
AUTOMATIC STORE (RETRACT) SEQUENCE
PART 4. VEHICLES EQUIPPED WITH AIR SUSPENSION WILL NOT RETURN TO RIDE HEIGHT
1. Vehicles equipped with HWH air dump system will not return to ride height.
a. Make sure there is at least 100 psi of air in the vehicle air tanks. The vehicle engine
SEE: MP85.1045
MP85.1045
should be running. Make sure the touch panel LEVEL MODE light is OFF. If air
is not exhausting from the dump valves, the problem is in the vehicle suspension,
most likely a height control valve. If air is exhausting from the dump valve(s) unplug
the dump valve(s). If the air continues to exhaust from the valve(s), replace the
valve(s). If the air stops exhausting from the dump valve(s) when they are unplugged,
either the 9300 wire in the harness is shorted to +12 voltage or the control box is bad.
b. Unplug the 12 pin brown connector from the back of the control box. Make sure the
ignition is ON and the "STORE" light on the touch panel is on. Check the red LED 12.
If the LED is on, replace the control box. If the LED is not on, the problem has to be
in the harness.
CN8
BLACK
8 PIN
HARNESS
TOUCH PANEL
GRAY
12 PIN
CN6
12 PIN
BLACK
CN7
6230
9300
REAR AIR DUMP SOLENOID
REAR AIR DUMP SOLENOID
FRONT AIR DUMP SOLENOID
TO HWH GROUND
GRAY
4 PIN
9300
BROWN
12 PIN
CN3
STUD - 6230
AB
P.E.D
B A B A B A
SEE: MP85.1045
2. Vehicles equipped with pilot air dump system will not return to ride height.
a. Make sure there is at least 100 psi of air in the vehicle air tanks. The ignition must
be on. Make sure the STORE light is ON. Check the YELLOW (17) LED and the
RED (18) LED for travel. Only the RED (18) LED should be lit. If LED 18 is lit,
check for +12 volts between the white ground wire and the 9301 wire in the HWH
4 pin UML plug. If power is not present, the problem is either the white ground wire,
the 9301 wire or their connections. If power is present, the problem is with the
chassis equipment or harness. Contact the vehicle manufacturer for assistance.
b. If red LED (18) is not lit, check fuse F9. If F9 is not blown, check red LED (37).
If LED (37) is off, there is no ignition power to the control box. Recheck Part 4. of
this manual . If red LED (37) is on, replace the control box.
c. If F9 is blown, unplug the 4 pin UML connector from the pilot dump harness.
Replace the fuse and retry. If the fuse blows, the problem is probably the harness.
If the fuse does not blow, the problem is the suspension equipment. Contact the
vehicle manufacturer for assistance.
replace the control box.
If yellow LED (17) is lit,
d.
SEE: MP85.184J & MP85.091C
LEFT SIDE
RIGHT SIDE
GROUND
FRONT
REAR
+12V
LOCATION
9
BOARD
OLD
(39)
383736
36
F12
3837
SENSING UNIT
F1
F2
LED
FUSE
2
DUMP
4
12
11
RIGHT REAR
1 3
REAR LEFT
F4
19
F3
F9
32
22
27
28
26
25
24
23
21 29 3130
16
15
MASTER RELAY RELAY
F6
13
14
F7
6
PUMP
TRAVEL
F8
18
17
8
F10
33 34 35
(F11)PF4
PF3
20
RIGHT
CRX2
FRONT
5
FRONT LEFT
7
CRX1
CN7
8 PIN
BLACK
12 PIN
BLACK
7699
9000 4 PIN
GRAY CN8
CN3
12 PIN
BROWN
12 PIN
GRAY
CN6
LEVELING SYSTEM - LEVELING
SEE ELECTRICAL CONNECTION
6230 - 6231
MASTER RELAYS
MANIFOLD - PUMP AND
DIAGRAM - 625 SERIES
9300
9301 CONNECTION
PILOT DUMP
BY OEM
MP85.091C
SEE: MP85.184J
SEE: MP85.184J
MP85.184J
SEE: MP85.184J & MP85.091C