Vintage Air 551168 User manual

an ISO 9001:2008 Registered Company
1967-68 Ford Mustang
Mercury Cougar
without Factory Air
Evaporator Kit
(551168)
18865 Goll St. San Antonio, TX 78266
Phone: [phone]
Fax: [phone]
www.vintageair.com
901277 REV F 11/18/16, PG 1 OF 24
FOR
D

2
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901277 REV F 11/18/16, PG 2 OF 24
Thank you for purchasing this evaporator kit from Vintage Air. When installing these
components as part of a complete SureFit™ system, Vintage Air recommends working
from front to back on the vehicle, installing the condenser kit, hose kit, and compressor
rst, followed by the wiring, evaporator, and nally the control panel.
Cover..................................................................................................................................
Table of Contents.................................................................................................................
Packing List/Parts Disclaimer..................................................................................................
Information Page..................................................................................................................
Wiring Notice.......................................................................................................................
Engine Compartment Disassembly, Condenser Assembly and Installation, Compressor and
Brackets, Passenger Compartment Disassembly........................................................................
Defrost Duct and Fresh Air Cap Installation..............................................................................
Firewall Cover Installation.....................................................................................................
Evaporator Installation..........................................................................................................
Vintage Air Center Louver Installation, (Optional) Center Louver Installation
Using OEM Center Vent Trim................................................................................................
Drain Hose Installation, Lubricating O-rings, A/C Hose Installation............................................
Heater Hose & Heater Control Valve Installation.....................................................................
A/C and Heater Hose Routing...............................................................................................
Under Dash Louver Installation............................................................................................
Final Steps........................................................................................................................
Control Panel & Duct Hose Routing.......................................................................................
Evaporator Hardline Installation...........................................................................................
Wiring Diagram..................................................................................................................
Gen IV Wiring Connection Instruction....................................................................................
Operation of Controls..........................................................................................................
Troubleshooting Guide.........................................................................................................
Troubleshooting Guide (Cont.).............................................................................................
OEM Center Vent Trim Louver Template.................................................................................
Packing List.......................................................................................................................
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Table of Contents

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901277 REV F 11/18/16, PG 3 OF 24
Packing List:
Evaporator Kit (551168)
No.
1.
2.
Qty.
1
1
Part No.
744004-VUE
781067
Description
Gen IV 4-Vent Evaporator Sub Case
Accessory Kit
** Before beginning installation, open all packages and check contents of shipment.
Please report any shortages directly to Vintage Air within 15 days. After 15 days,
Vintage Air will not be responsible for missing or damaged items.
NOTE: Images may not depict actual parts and quantities.
Refer to packing list for actual parts and quantities.
1
2
Gen IV 4-Vent
Evaporator
Sub Case
744004-VUE
Accessory Kit
781067

4
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901277 REV F 11/18/16, PG 4 OF 24
Important Notice—Please Read
For Maximum System Performance, Vintage Air Recommends the Following:
New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is shipped with
proper oil charge).
All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will need oil
added).
NOTE: Vintage Air systems are designed to operate with R134a refrigerant only.
Use of any other refrigerant could damage your A/C system and/or vehicle, and
possibly cause a fire, in addition to potentially voiding the warranties of the A/C
system and its components.
Refrigerant Capacities:
Vintage Air System: 1.8 lbs. (1 lb., 12 oz.) of R134a, charged by weight with a quality charging station or
scale. NOTE: Use of the proper type and amount of refrigerant is critical to system operation and
performance.
Other Systems: Consult manufacturer’s guidelines.
Lubricant Capacities:
Safety Switches
Service Info:
Protect Your Investment: Prior to assembly, it is critical that the compressor, evaporator, A/C hoses and
fittings, hardlines, condenser and receiver/drier remained capped. Removing caps prior to assembly will
allow moisture, insects and debris into the components, possibly leading to reduced performance and/or
premature failure of your A/C system. This is especially important with the receiver/drier.
Additionally, when caps are removed for assembly, BE CAREFUL! Some components are shipped under
pressure with dry nitrogen.
Evacuate the System for 35-45 Minutes: Ensure that system components (Drier, compressor, evaporator
and condenser) are at a temperature of at least 85° F. On a cool day, the components can be heated with a
heat gun or by running the engine with the heater on before evacuating. Leak check and charge to
specifications.
Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages the
compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively high head
pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch combines Hi/Lo
pressure protection with an electric fan operation signal at 254 PSI, and should be substituted for use with
electric fans. Compressor safety switches are extremely important since an A/C system relies on refrigerant
to circulate lubricant.
Bolts Passing Through Cowl and/or Firewall:
To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts
passing through the cowl and/or firewall, Vintage Air recommends coating the threads with silicone prior to
installation.
Heater Hose (Not Included With This Kit):
Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer. Routing and
required length will vary based on installer preference.

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901277 REV F 11/18/16, PG 5 OF 24
Important Wiring Notice—Please Read
Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed.
There Should Be a Capacitor Found At Each of the Following Locations:
1. On the positive terminal of the ignition coil.
2. If there is a generator, on the armature terminal of the generator.
3. If there is a generator, on the battery terminal of the voltage regulator.
Most alternators have a capacitor installed internally to eliminate what is called “whining” as
the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio
interference capacitor can be added to the battery terminal of the alternator.
It is also important that the battery lead is in good shape and that the ground leads are not
compromised. There should be a heavy ground from the battery to the engine block, and
additional grounds to the body and chassis.
If these precautions are not observed, it is possible for voltage spikes to be present on the
battery leads. These spikes come from ignition systems, charging systems, and from
switching some of the vehicle’s other systems on and off. Modern computer-operated
equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected
resets, strange behavior, and/or permanent damage.
Vintage Air strives to harden our products against these types of electrical noise, but there is
a point where a vehicle’s electrical system can be degraded so much that nothing can help.
Radio interference capacitors should be available at most auto and truck parts suppliers. They
typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter,
and they have a single lead coming from one end of the cylinder with a terminal on the end of
the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The
specific value of the capacitance is not too significant in comparison to ignition capacitors that
are matched with the coil to reduce pitting of the points.
Care must be taken, when installing the compressor lead, not to short it to ground.
The compressor lead must not be connected to a condenser fan or to any other
auxiliary device. Shorting to ground or connecting to a condenser fan or any other
auxiliary device may damage wiring, the compressor relay, and/or cause a
malfunction.
When installing ground leads on Gen IV systems, the blower control ground and ECU
ground must be connected directly to the negative battery post.
For proper system operation, the heater control valve must be connected to the
ECU.
•
•
•

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901277 REV F 11/18/16, PG 6 OF 24
Engine Compartment Disassembly
1.
2.
3.
4.
5.
Disconnect battery.
Remove battery (retain).
Drain radiator.
Remove radiator (retain).
Remove the OEM heater hoses (discard).
NOTE: Before starting the installation, check the function of the vehicle (horn, lights, etc.) for proper
operation, and study the instructions, illustrations, & diagrams.
Perform the Following:
Figure 2
Figure 1
Condenser Assembly and Installation
1.
2.
Refer to separate instructions included with the condenser kit to install the condenser.
Binary switch installation (Refer to condenser instructions).
Compressor and Brackets
1. Refer to separate instructions included with the bracket kit to install the compressor bracket.
Passenger Compartment
Disassembly
1.
2.
3.
4.
5.
6.
7.
Remove the glove box (retain) (See Figure 1, below).
Remove the center console (if equipped).
Remove the heater assembly and all related ducting (discard, but retain screws) (See Figure 2, below).
Remove OEM control panel assembly (retain) (See Figure 1, below). NOTE: Refer to control panel
conversion kit instructions for installation of controls.
Remove the radio (retain) (See Figure 1, below).
Remove the OEM defrost ducts (discard) (See Figure 2, below).
Remove the dash brace (discard) (See Figure 2, below).
Perform the Following:
MUSTANG
Radio
Glove
Box
Dash
Brace OEM Heater
Assembly
Defrost
Ducts

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901277 REV F 11/18/16, PG 7 OF 24
Defrost Duct and
Fresh Air Cap Installation
1.
2.
3.
4.
5.
Install the defrost ducts under the dash, and secure using (4) OEM nuts as shown in Figure 3, below.
Hold the fresh air cap under the dash and mark the (3) mounting holes.
Drill (3) 1/8” mounting holes under the dash (See Figure 3, below).
Apply a 1/4” bead of silicone around the mating surface of the fresh air cap as shown in Figure 3, below.
Secure the fresh air cap to the fresh air hole using (3) #10 x 1/2” sheet metal screws as shown in Figure 3,
below.
Figure 3
Driver Side
Defrost Duct
626676
Passenger Side
Defrost Duct
626680
(4) OEM
Nuts
(3) #10 x 1/2”
Sheet Metal
Screws
Fresh Air
Cap
62354-VFE
Silicone
Drill (3)
1/8” Holes

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901277 REV F 11/18/16, PG 8 OF 24
Firewall Cover Installation
1.
2.
3.
Install (3) grommets onto the rewall cover as shown in Figure 4, below.
Apply a 1/4” bead of silicone around the mating surface of the rewall cover as shown in Figure 4a, below.
Secure the rewall cover to the rewall using (4) 1/4-20 x 1” hex bolts, at washers and nuts, and (1)
#10 x 1/2” sheet metal screw (See Figure 4, below). NOTE: The rewall cover installs on the engine
compartment side of the rewall.
Figure 4a
Figure 4
#10 x 1/2”
Sheet Metal
Screw
Silicone
Engine
Compartment
Side of Firewall
Firewall
Cover
642068
Grommet
33137-VUI
Grommet
33134-VUI
Grommet
33135-VUI
(4) 1/4-20 x 1”
Hex Bolts
and Washers
OEM Dimple
Drill 1/8” Hole
(4) 1/4” Nuts
with Star Washers
(4) 1/4” Flat
Washers
OEM Heater
Core Holes
(4) OEM
Blower Motor
Mounting Holes
OEM Blower Motor
Hole in Firewall

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901277 REV F 11/18/16, PG 9 OF 24
Evaporator Installation
1.
2.
3.
4.
5.
6.
7.
On a workbench, install the evaporator rear brackets and hardlines with properly lubricated O-rings (See
Figure 9, Page 11, and Figure 16, Page 17).
Install the front mounting bracket onto the evaporator using (2) 1/4-20 x 1/2” hex bolts, and tighten as
shown in Figure 5, below.
Drill (2) 9/32” holes in rewall using OEM dimples (See Figure 5a, below).
Lift the evaporator unit up under the dashboard. Secure loosely to the rewall from the engine compartment
side using (2) 1/4-20 nuts and washers (See Figure 5a, below). NOTE: To ensure proper drainage, it is
very important that the evaporator is level, both left-right and fore-aft. Check for level on the at
portions of the case around the drain.
Using the front evaporator bracket as a guide, mark and drill (2) 3/16” holes in the cowl (See Figure 5b,
below).
Using (2) #14 x 3/4” sheet metal screws, secure the front evaporator mounting bracket to the inner cowl
(See Figure 5b, below).
Verify that the evaporator unit is level and square to the dash; then tighten all mounting bolts. NOTE:
Tighten the bolt on the rewall rst. Then tighten the front mounting bracket sheet metal screws.
NOTE: To ensure a watertight seal between the passenger compartment and the vehicle exterior, for
all bolts passing through the rewall, Vintage Air recommends coating the threads with silicone prior
to installation.
Figure 5
Figure 5a Figure 5b
Evaporator
Front Bracket
643169-FCB
(2) 1/4-20 x 1/2”
Hex Bolts
OEM Dimple
Drill 9/32”
Hole
OEM Dimple
Drill 9/32”
Hole
Passenger Side
Evaporator
Mounting Hole
Driver Side
Evaporator
Mounting Hole
Approximately 3”
Approximately 3 ½”
OEM Heater
Core Holes
(2) 1/4-20 Nuts
and Flat Washers
Passenger
Compartment
Side of Firewall
Drill
(2) 3/16”
Holes
(2) #14 x 3/4”
Sheet Metal
Screws
Inner
Cowl

10
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901277 REV F 11/18/16, PG 10 OF 24
Vintage Air
Center Louver Installation
(Optional)
Center Louver Installation,
Using OEM Center Vent Trim
1.
2.
3.
1.
2.
3.
Remove the OEM center vent trim from the dash as shown in Figure 6, below.
Modify the center louver opening on the dash as shown in Figure 6a, below.
Install the center louver assembly into the dash as shown in Figure 6b, below.
Cut the OEM center vent trim using the template provided on Page 23 (See Figure 7, below). NOTE: Remove
the louver from the center louver assembly.
Install the louvers into the OEM center vent trim as shown in Figure 7, below.
Reinstall the OEM center vent trim into the dash as shown in Figure 7, below.
Figure 6
Figure 7
Figure 6a
Figure 6b
CUT OUT
CUT OUT
OEM Center
Vent Trim
Cut &
Remove
5/8” 5/8”
Center Louver
Assembly
590068
Assembled View
OEM Center Vent Trim
(If Using Aftermarket
Trim, Center Template)
OEM Center
Vent Trim
(2) Louvers
Center Louver
Bracket
642060
(2) #6 x 3/8”
Pan Head
Screws

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901277 REV F 11/18/16, PG 11 OF 24
Figure ##
O-ring Installs
Over Male Insert
to Swaged Lip
O-ring
#6 O-ring
#8 O-ring #10 O-ring
O-ring
Supplied Oil
for O-rings
Male
Insert Female Nut
Hold With
This Wrench
Twist With
This Wrench
Lubricating O-rings
For a proper seal of fittings: Install supplied
O-rings as shown, and lubricate with supplied
oil.
NOTE: Standard torque specifications:
#6: 11 to 13 ft-lb.
#8: 15 to 20 ft-lb.
#10: 21 to 27 ft-lb.
Figure 9
Drain Hose Installation
1.
2.
3.
4.
Locate the evaporator drain on the bottom of the evaporator case.
In line with the drain, lightly make a mark on the rewall. Then, measure 1” down and drill a 5/8” hole
through the rewall (See Figure 8, below).
Install the drain hose onto the evaporator drain on the bottom of the unit, and route it through the rewall.
Install a 1/2” 90° drain elbow onto the drain hose (See Figure 8, below).
Figure 8
1”
1/2” Drain
Elbow
Drain
Hose
Drain
A/C Hose Installation
1.
2.
3.
4.
Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 9, above) and connect the 45°
tting to the #8 discharge port on the compressor. Then route the straight female tting with service port to
the #8 condenser hardline coming through the radiator core support (See Figure 11, Page 13). Tighten each
tting connection as shown in Figure 9, above.
Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 9, above) and connect the 90°
female tting with service port to the #10 suction port on the compressor. Then route the 90° female tting
to the #10 evaporator hardline coming through the rewall (See Figure 10, Page 12, & Figure 11, Page 13).
Tighten each tting connection as shown in Figure 9, above. Wrap the #10 tting connections with press tape
(See Figure 10, Page 12).
Locate the #6 evaporator/drier hose. Lubricate (2) #6 O-rings (See Figure 9, above) and connect the straight
female tting to the #6 drier hardline coming through the radiator core support. Then route the 90° female
tting to the #6 evaporator hardline coming through the rewall (See Figure 10, Page 12 and Figure 11, Page
13). Tighten each tting connection as shown in Figure 9, above.
Use (6) tie wraps to secure the #6 A/C hose to the brace as shown in Figure 11, Page 13.
Standard Hose Kit:
1. Refer to separate instructions included with modied hose kit.
Modied Hose Kit:

12
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901277 REV F 11/18/16, PG 12 OF 24
Heater Hose
& Heater Control Valve Installation
1.
2.
Route a piece of heater hose from the water pump to the lower heater line coming through the rewall as
shown in Figure 10, below. Secure using hose clamps.
Route a piece of heater hose from the intake to the upper heater line coming through the rewall as shown
in Figure 10, below. NOTE: Install the heater control valve in line with the intake manifold (pressure
side) heater hose, and secure using hose clamps. Also note proper ow direction.
FROM EVAPORATOR
TO WATER PUMP
FROM INTAKE
MANIFOLD
FROM HTR CNTRL VLV
TO EVAPORATOR
Figure 10
ECU
Module
Press
Tape
#10 Hardline
(Insulated)
Expansion
Valve
Firewall
Firewall Cover
642068
O-rings
#10 A/C
Hose
#6 A/C
Hose
Heater
Hose
NOTE: Flow Direction Follows
Molded Arrow on Valve.

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13 901277 REV F 11/18/16, PG 13 OF 24
A/C and Heater Hose Routing
NOTE: Vintage Air Systems use 5/8” heater connections. On engines equipped with 3/4” hose nipples, these will need to be removed and replaced with 5/8” nipples (not supplied). For water pumps with a cast-in 3/4” heater outlet, a 3/4” x 5/8” reducer tting (not supplied) will need to be installed in the heater hose.
Figure 11
Heater Hose
(Heater Core/
Water Pump)
Core
Support
Heater Hose
(Heater Control
Valve/Intake)
(6) Tie
Wraps #10 A/C
Hose
#8 A/C
Hose
#6 A/C
Hose
Inner
Fenderwell
#8 Condenser to
Core Support
Hardline
081068
#6 Drier to
Core Support
Hardline
081095
Compressor
Safety Switch
(Binary Type)
Screw-on Drier
(Refer to
Condenser
Instructions)
In
Out

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901277 REV F 11/18/16, PG 14 OF 24
Figure 12
Under Dash Louver Installation
1.
2.
Install the driver and passenger side louver housings under the dash using OEM screws as shown in Figure
12, below.
Install the louvers into the driver and passenger side louver housings as shown in Figure 12, below.
Control
Panel
OEM
Screws
Louver
Housing Housing
Louver
Adapter
Housing
Louver
Adapter
Passenger Side
Vent Trim
Passenger Side
Vent Trim
OEM
Screws
Louver
Housing

15
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901277 REV F 11/18/16, PG 15 OF 24
Figure 13
Figure 14a
Figure 14
Final Steps
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Install duct hoses as shown in Figure 15, Page 16.
Route A/C wires (12 volt/grounds/binary switch/heater valve) through 3/8” grommet as shown in Figure 13,
below.
Install the control panel assembly. Refer to control panel instructions.
Plug the wiring harnesses into the ECU module on the sub case as shown in Figure 15, Page 16. Wire
according to the wiring diagrams on Pages 18 and 19.
Reinstall the glove box.
Reinstall the center console (if equipped). Modify the console as shown in Figures 14 & 14a, below.
Reinstall all previously removed items.
Fill radiator with at least a 50/50 mixture of approved antifreeze and distilled water. It is the owner’s
responsibility to keep the freeze protection at the proper level for the climate in which the vehicle is operated.
Failure to follow antifreeze recommendations will cause heater core to corrode prematurely and possibly burst
in A/C mode and/or freezing weather, voiding your warranty.
Double check all ttings, brackets and belts for tightness.
Vintage Air recommends that all A/C systems be serviced by a licensed automotive A/C technician.
Evacuate the system for a minimum of 45 minutes prior to charging, and perform a leak check prior to
servicing.
Charge the system to the capacities stated on Page 4 of this instruction manual.
See Operation of Controls procedures on Page 20.
3/4”
3 ¾”
MUSTANG
Passenger Side
Under Dash
Console
Cut &
Remove
Top Side
3/8” Grommet
Firewall
Cover

16
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901277 REV F 11/18/16, PG 16 OF 24
Control Panel & Duct Hose Routing
Passenger Side
Defrost Duct
2” x 14”
Driver Side
Defrost Duct
2” x 26”
Passenger Side
Louver
2 ½” x 60”
Driver Side
Louver
2 ½” x 36”
Driver Side
Center Louver
2 ½” x 20”
Passenger Side
Center Louver
2 ½” x 20”
Plug From
Wiring
Harness
232600-VUA
Plug From
Control
Wiring
Harness
232002-VUA
Figure 15

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17 901277 REV F 11/18/16, PG 17 OF 24
Evaporator Hardline Installation
Figure 16
Bracket
1/4” Push Nut
1/4-20 x 1”
Hex Bolt
Driver Side
Evaporator
Rear Bracket
641273
Heater Line
(Evaporator
to Intake)
081066
Heater Line
(Evaporator to
Water Pump)
081067
#6 Hardline
081064
(2) #10 O-rings
#10 O-ring
(2) 1/4-20 x 1/2”
Hex Bolts
(Located on
Sub Case)
#6 O-ring
#10 Hardline
081065
Press Tape
ECU
Module
Passenger Side
Evaporator
Rear Bracket
641272
NOTE: After installing the #10 hardline, wrap all exposed metal (ttings & tubes) inside the passenger compartment with the supplied press tape.

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901277 REV F 11/18/16, PG 18 OF 24
WHT/GRN
WHT/YEL
WHT/RED
RED
WHT
BACKLIGHT NEG
FAN WIPER
MODE WIPER
TEMP WIPER
5V-SW
GND
BACKLIGHT POS
AC ANNUNCIATOR
PRE-WIRED
GEN IV WIRING DIAGRAM
REV D, 5/6/2014
GEN IV ECU
PROGRAM
Wiring Diagram
TEMP
MODE
FAN
A/C
(IF USED)
232007-VUR
232002-VUA
** CIRCUIT
BREAKER
30 AMP
*** WIDE OPEN
THROTTLE
SWITCH
(OPTIONAL)
* DASH LAMP
(IF USED)
Dash Lamp Is Used Only With Type 232007-VUR Harness.
Warning: Always Mount Circuit Breaker As Close to the Battery As Possible. (NOTE: Wire Between
Battery and Circuit Breaker Is Unprotected and Should Be Carefully Routed to Avoid a Short
Circuit).
Wide Open Throttle Switch Contacts Close Only at Full Throttle, Which Disables A/C
Compressor.
JF8
BLK
ORA
TAN
VIEWED FROM WIRE SIDE
•
•
•
HEATER
CONTROL VALVE

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901277 REV F 11/18/16, PG 19 OF 24
RED
CIRCUIT BREAKER
30 AMP
+
+
-
BLACK
RED
WHITE
RED
CHASSIS GROUND
A/C
COMPRESSOR
RELAY
Ignition Switch:
Dash Light:
NOTE:
MOUNT RELAY
IN DESIRED
LOCATION
UNDER DASH
GREEN
FIREWALL
BLUE
BLUE
RED
&
WHITE
VIOLET
(IGNITION HOT
TERMINAL)
IGNITION
SWITCH
DASH BACK LIGHT+0-12v
TAN
GRAY
BLUE
WHITE
WHITE
RED
RED
WHITE
COMPRESSOR
BATTERY
NOTE: CONNECT WHITE
WIRES DIRECTLY TO
(-) BATTERY TERMINAL
BAT
RUN
12V
RED
GREEN
RED
RED
BLUE
LATCH
BLACK
BINARY
SAFETY
SWITCH
YELLOW
ORANGE
WIRING
HARNESS
Violet 12V Ign Switch Source (Key On
Accessory) Position Must Be Switched.
Tan Wire Used Only With Vintage Air
Supplied Control Panel With LED Back
Light.
Binary: Connect As Shown (Typical
Compressor Wiring). Be Sure
Compressor Body Is Grounded.
Trinary Switch: Connect According To
Trinary Switch Wiring Diagram.
Install With Servo Motor Facing Down,
As Shown. Note Flow Direction Arrow
Molded Into Valve Body, And Install
Accordingly.
White Must Run To (-) Battery. Red May
Run To (+) Battery Or Starter. Mount
Circuit Breaker As Close to Battery As
Possible.
Heater Control Valve:
Binary/Trinary & Compressor:
Circuit Breaker/Battery:
CONTROL
WIRING
HARNESS
NOTE:
YELLOW & ORANGE
COMING FROM
HARNESS ARE NOT
USED.
WIRING
HARNESS
GRAY WIRE IS USED FOR
PROGRAMING CONTROLS
IF APPLICABLE
WIRING
HARNESS
Gen IV Wiring
Connection Instruction
HEATER
CONTROL VALVE
WARNING:
ALWAYS MOUNT CIRCUIT BREAKER
AS CLOSE TO THE BATTERY AS POSSIBLE.
(NOTE: WIRE BETWEEN BATTERY AND
CIRCUIT BREAKER IS UNPROTECTED
AND SHOULD BE CAREFULLY ROUTED
TO AVOID A SHORT CIRCUIT).
NOTE: HEATER CONTROL
VALVE CONNECTION AND
CHASSIS GROUND MAY BE
LOCATED ON EITHER SIDE
OF THE FIREWALL. ENSURE
CONNECTOR IS LATCHED
FIRMLY.

20
www.vintageair.com
901277 REV F 11/18/16, PG 20 OF 24
Operation of Controls
Adjust to desired
speed.
Blower Speed
Adjust to desired
speed.
Adjust to desired
mode position
(DASH position
recommended).
Adjust to desired
speed.
Adjust to DEFROST position for maximum defrost, or
between FLOOR and DEFROST positions for a bi-level
blend (Compressor is automatically engaged).
Adjust to desired
temperature.
For A/C operation, adjust to
coldest position to engage
compressor (Adjust between
HOT and COLD to reach
desired temperature).
A/C Operation
Heat Operation
Defrost/De-fog Operation
On Gen IV systems with three lever/knob controls, the temperature control toggles between heat and A/C
operations. To activate A/C, move the temperature lever/knob all the way to cold and then back it off to the desired
vent temperature. For heat operation, move the temperature lever/knob all the way to hot and then adjust to the
desired vent temperature. The blower will momentarily change speed, each time you toggle between operations, to
indicate the change. NOTE: For proper control panel function, refer to control panel instructions for
calibration procedure.
Blower Speed
Blower Speed
This lever/knob controls
blower speed, from
OFF to HI.
This lever/knob controls
the mode positions,
from DASH to FLOOR
to DEFROST, with a
blend in between.
This lever/knob controls
the temperature,
from HOT to COLD.
Blower Speed
Mode Control
Temperature Control
Blower
Speed
Mode
Control
Temperature Control
Temperature Control
Temperature Control
Mode Control
Mode Control
Mode Control
For maximum heating, adjust
to hottest position (Adjust
between HOT and COLD to
reach desired temperature).
Adjust to desired
mode position
(FLOOR position
recommended).
OEM Blower
Switch Not Used
TEMP DEF
HEAT
TEMP DEF
HEAT
TEMP
DEF
HEAT
TEMP
DEF
HEAT
Temperature
Control