Dakota Digital VHX-66C-NOV User manual

Manual # 650386
VHX-66C-NOV
Dakota Digital VHX Instrument Installation
For 1966-‘67 Chevy Nova
Your new VHX-66C-NOV kit includes:
Installation
Control Box
(x7) #6-20x1.25” Screws
(x5) #8-18x.375” Screws
(x7) #6 Washers
36” CAT5 Cable
Universal Sender
Pack
Installation Manuals
VHX Display
1. Remove the stock gauges from the dash. Disassemble the stock instrument system by removing
the seven (7) screws holding the instrument housing to the bezel.

Manual # 650386
2. Detach the lens from the bezel and separator plate by removing the two (2) screws shown below.
The only item to be reused is the original front bezel and hardware. Now is a good time to clean the
bezel and remove any dirt or old lens gasket material.
3. If using a reproduction bezel, be sure to keep the top four (4) mounting screws and five (5) factory
clips (arrows below) from the factory gauge cluster as they will be used by the Dakota Digital system.

Manual # 650386
4. Place the Dakota Digital system into the bezel, taking care to align all mounting holes. Using the seven (7)
provided #6-20x1-1/4” screws and washers, secure the gauges to the bezel. Pay special attention to align
all visible surfaces before tightening the provided hardware. Some bezels may be bowed and not perfectly
straight, requiring slight adjustments.
5. Place the assembled instrument system in the dash, connect and carefully route the CAT5
cable to the VHX Control Box mounting location.

Manual # 650386
4510 W. 61st St. N., Sioux Falls SD 57107
Phone: [phone] Fax: [phone]
www.dakotadigital.com
[e-mail]
7. Finish securing the assembled VHX instrument system to the dash using the four (4) factory flat
head screws at the top of the bezel (black arrows above). Again, use caution when tightening.
Refer to the main manual for wiring instructions to complete the VHX installation.
6. Secure the cluster to the dash using the five (5) provided #8-18x.375” screws at the base
of the bezel (white arrows below). Be careful not to over tighten.

MAN 650314:D
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VHX
Analog / Digital Gauge System
INSTALLATION AND OPERATION MANUAL
Please read this before beginning installation or wiring.
IMPORTANT NOTE!
This
system
has an odometer preset option that is only
available for the first 100 miles of operation. See odometer preset section (pg 26)
for instru
ctions
and setup information
.

MAN 650314:D
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Thank you for purchasing a VHX system from DAKOTA DIGITAL. VHX is a loose
acronym for Vehicle Hybrid Instrument Systems. Representing the latest electronic dashboard
technology for the street rodder, car, and truck enthusiast alike, the VHX system combines
modern digital electronics with a traditional look to give the driver up-to-date and accurate
information on the operation of his or her vehicle. Fully lit needles, backlit faces, and highly
visible LCD message centers are a few features that make the VHX lineup stand out from other
aftermarket instrumentation. The VHX system boasts excellent daytime visibility and while under
computer control, fully backlit and dimmable for nighttime driving. Monitoring solid state sensors
with microprocessor technology and driving precision stepper motors, the VHX dashboard gives
the driver unparalleled accuracy. User-customizable display feedback and additional features not
typically found on any other brand or type of instrumentation are standard in the VHX system.
Digital accuracy and solid state reliability will give you, the driver, quality service for miles down
the road that includes a limited lifetime warranty on a product engineered and manufactured in
the USA!
VHX INSTRUMENT SYSTEM FEATURES
Digital LCD displays
•Each of the six analog gauges can be displayed here as well as additional functions listed below. Features
are available on either display (L or R).
Mileage readings
•Million mile odometer.
•Two (A/B) re-settable trip odometer (0-9999.9).
•Re-settable service odometer (0-9999 countdown).
Performance readings
•High speed recall. This can be manually reset during normal operation.
•High RPM recall. This can be manually reset during normal operation.
•0-60 mph (0-100kmh) time.
•¼ mile time. This can manually reset during normal operation.
•¼ mile end speed (trap speed). This is reset when the ¼ mile time restarts.
Hour meter
•Resettable hours (0-999.9).
English/metric conversion
•Alternate speed and temperature can be displayed in LCD display.
Built-in Indicators
•Left/Right Turn signal indicators.
•High Beam indicator.
•Check Engine indicator.
•Brake warning indicator.
•4x4 indicator.
•Wait to Start indicator.
•Cruise control indicator.
•Gear position indicator which displays full gear word with use of Dakota Digital GSS-2000.
(purchased separately)
Special outputs
•Shift output to activate external light
•Selectable 2000ppm or 4000ppm speed output for cruise or ECM (not available when using BIM-01-1 for
speed)
Demonstration mode
•Holding Switch 2 while turning on the key will start the system going through a preset sequence of readings.
To exit the demo mode, turn the key off. You may also wire up a separate switch to power the gauges for
demo mode without powering the entire vehicle.
Auxiliary gauge readings in LCD message displays with expansion bus interface modules (BIM)
(purchased separately)

MAN 650314:D
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TYPICAL VHX DISPLAY LAYOUTS
Tach/LCD2 Message Center
Speed/LCD1 Message Center
Tach/LCD2 Message Center
Tach/LCD2 Message Center
Tach/LCD2 Message Center
Speed/LCD1 Message Center
Speed/LCD1 Message Center
Speed/LCD1 Message Center

MAN 650314:D
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WARNING
These are precision instruments and must be handled with care. Do not disassemble gauges.
CARE AND CLEANING
Never open the system or attempt to remove the needles as the calibration of the
instrument system could be thrown off. All systems are calibrated and tested before they
leave Dakota Digital.
The clear lens on the front of the VHX system can be cleaned with a mild soap and water
solution or common glass cleaners. Use a soft cloth such as a micro-fiber for wiping the lens
clean.
MOUNTING SYSTEMS
Most VHX systems and kits will come with a separate instruction sheet with mounting
details. Follow this sheet for mounting the actual display system in the dash, and then refer to
this manual for wiring and operation instructions.
CONTROL BOX MOUNTING
Once the display panel is in place, mount the control box within reach of the supplied
networking cable (approximately three (3) feet). If a longer cable is required, replacement CAT5
cables are available online as well as your local electronics stores. Choose a mounting location
that will allow you access to wire all of the inputs on either side of the control box. Double sided
tape, hook and loop fasteners or screws in the two tabs on the case work fine for securing the
control box under the dash.
When selecting a mounting location, avoid placing the control module next to, or
just opposite of the firewall from, ignition components, i.e.: Ignition coil, HEI, etc. Ignition
components can emit tremendous amounts of electrical noise, affecting the operation of
electrical components which can cause erratic operation.
***If you are purchasing a longer network cable to connect the display system to the
control box please make sure to get a CAT 5, CAT5E, or CAT6 “patch cable” and NOT a
“cross over” cable. Replacement cable should be seven feet or less.

MAN 650314:D
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WIRING
While the control box contains several connections, the wiring is straightforward.
Depending on how many auxiliary functions you want displayed, not every terminal will be used in
most applications. On the pages that follow, we describe the function of each terminal, what they
do, and how to wire them.
MOMENTARY SW2
MOMENTARY SW1
CAT 5
Cable
(To Display)
DISPLAY PANEL
STATUS LED
DIM-1
Optional
Cruise Control
Engage Output
Glow Plug Relay
or
Wait To Start
Output
ECU/ECM
Check Engine
Output
BIM
CONNECTION
ONLY!
4x4
Transfer Case
Switch
DAKOTA DIGITAL
GSS UNIT
1-Wire output
Right Turn
Signal Wire
Optional
Left Turn
Signal Wire
High Beam
Wire
Parking Brake
Switch
SPEED OUT
(2k or 4k PPM)
Connect to tail light circuit,
LED backlights will turn on
when termianl has +12V
Light or Buzzer
(4 Watts or more)
Tail Light
Light or Buzzer
(4 Watts or less)
Relay
EXISTING
FUEL LEVEL
SENSOR
RED
WHITE
BLACK
BLUE or RED
BROWN or BLACK
Additional ground wire to fuel
sensor body or mounting screw.
PRESSURE SENSOR
SEN-03-8
0-100 PSI
TEMP SENSOR
SEN-04-5
100-300 F
PULSE
GENERATOR
ECU/ECM
Speed Output
RED
WHITE
BLACK
+12V KEY ON POWER
(fused 5 - 20 AMP max)
Connect to main
chassis ground
Ignition Coil
(negative side)
- + ECU/ECM
or Ignition Box
(tach output)
SPEED SENSOR
SEN-01-5
16k PPM
ACC. POWER CONST. POWER GROUND TACH WARN SPD + SPD SND SPD - SPD OUT SW2 (-) SW1 (-) ADJ SND ADJ - WTR SND WTR - OIL + OIL SND OIL - FUEL + FUEL SND FUEL -
WAIT (+)
CRUISE (-)
GEAR (1 WIRE)
4x4 (-)
RIGHT (+)
LEFT (+) HIGH (+)
BRAKE (-)
CHECK ENG (-)
VHX
CONTROL BOX
CABLE AUX.
I/O
DISPLAY
www.dakotadigital.com
[email protected]
605-332-6513
DIM (+)
+12V CONSTANT POWER
(fused 5 - 20 AMP max)

MAN 650314:D
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TERMINAL DESCRIPTIONS
CHECK ENGINE INDICATOR INPUT
BRAKE SYSTEM/PARKING BRAKE WARNING INPUT
HIGH BEAM INDICATOR INPUT
LEFT TURN SIGNAL INDICATOR INPUT
RIGHT TURN SIGNAL INDICATOR INPUT
4 WHEEL DRIVE INDICATOR INPUT
1-WIRE GEAR INDICATOR INPUT (FROM GSS UNIT)
WAIT TO START INDICATOR INPUT
CRUISE ENGAGED INDICATOR INPUT
FUEL LEVEL SENSOR GROUND OUTPUT
FUEL LEVEL SENSOR INPUT
FUEL LEVEL SENSOR POWER OUTPUT
OIL PRESSURE SENSOR GROUND OUTPUT
OIL PRESSURE SENSOR INPUT
OIL PRESSURE SENSOR POWER OUTPUT
WATER TEMPERATURE SENSOR GROUND OUTPUT
WATER TEMPERATURE SENSOR INPUT
NIGHT DIMMING ADJUSTMENT GROUND OUTPUT
NIGHT DIMMING ADJUSTMENT INPUT
SPEED SELECT SWITCH INPUT SW1
TACH SELECT SWITCH INPUT SW2
2000 PPM SPEED SIGNAL OUTPUT
VEHICLE SPEED SENSOR GROUND OUTPUT
VEHICLE SPEED SENSOR SIGNALINPUT
VEHICLE SPEED SENSOR POWER OUTPUT
RPM WARNING/SHIFT OUTPUT
TACHOMETER INPUT
+12 VOLT ACCESSORY POWER INPUT
MAIN CHASSISGROUND INPUT
STATUS LED
TO DISPLAY
CONNECTOR
(Doesn't matter which one)
ACC. POWER
CONST. POWER
GROUND
TACH
WARN
SPD +
SPD SND
SPD -
SPD OUT
SW2 (-)
SW1 (-)
ADJ SND
ADJ -
WTR SND
WTR -
OIL +
OIL SND
OIL -
FUEL +
FUEL SND
FUEL -
WAIT (+)
CRUISE (-)
GEAR (1 WIRE)
4x4 (-)
RIGHT (+)
LEFT (+)
HIGH (+)
BRAKE (-)
CHECK ENG (-)
VHX
CONTROL BOX
CABLE AUX.
I/O
DISPLAY
www.dakotadigital.com
[email protected]
605-332-6513
DIM (+) NIGHT DIMMING INPUT
+12 VOLT CONSTANT POWER INPUT
BIM CONNECTION
STATUS LED
This LED is located at the corner of the control box, next to the GROUND terminal. The
LED is used for diagnostics and for a quick visual check if power is present.
•A steady flash, on and off, about twice a second indicates the system is powered and
operating normally.
•On steady indicates low power, below 9V, at the POWER terminals, or that the system is
in DEMO mode.
•A short flash once every four seconds indicates the CONSTANT POWER terminal is
powered and the system is in stand-by mode.
•Not flashing or lighting indicates loss of power or ground.
GROUND
This is the main ground for the display system. A wire should be run from this terminal to
the vehicle’s main chassis ground. Use 18 AWG or larger wire to ensure sufficient grounding.
Proper vehicle grounding is extremely important for any gauge (or electronics) to operate
correctly. The engine block should have heavy ground cables to the battery, frame, firewall, and
body. Failure to properly ground the engine block or the control box can cause incorrect
or erratic operation.
CONST. POWER
Connect the CONST. POWER terminal to a +12V power from the fuse panel that is “hot”
all of the time, or a fussed wire (5-20 amp) direct to battery power. This terminal should have
power all of the time. The constant +12V supply source should be a fused 5 - 20 amp circuit, the
system draws less than 1 amp, so sharing an existing constant power circuit will generally be fine.
Use 18 AWG wire to ensure the system receives a sufficient power feed. This terminal keeps the
clock memory as well as returning the needles to zero when the system is shut off.

MAN 650314:D
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ACC. POWER
Connect the ACC. POWER terminal to accessory +12V power from the fuse panel or
vehicle wiring harness. This terminal should have power when the key is on or in the ‘accessory’
position. In addition to turning on the display system, this is also where the voltmeter gauge
senses the vehicle electrical system voltage. The accessory +12V supply source should be a
fused 5 - 20 amp circuit, the system draws less than 1 amp, so sharing an existing accessory
circuit will generally be fine. Use 18 AWG wire to ensure the system receives a sufficient power
feed.
*** Never connect any power terminal to a battery charger alone. The system needs to
have a 12 volt battery connected to it. Battery chargers have an unregulated voltage
output that will cause the system to not operate properly and may cause damage to the
control box.
TACH Connect the TACH terminal to the ignition system. •On vehicles using a separate ignition
coil, connect to the negative side of the coil. The negative side of the coil will be the wire that
goes to the points or electronic ignition module. •For GM HEI ignition equipped engines, connect
to the terminal marked “TACH” or on some systems, a single white wire with a spade terminal on
it. •On some aftermarket ignition systems, connect to the TACH output terminal. •On computer
controlled ignition systems consult a service manual for the wire color and location. •With a
magneto system, connect to the kill wire for the tach signal. Do not connect the TACH terminal
to the secondary, or high voltage, side of the ignition coil.
To avoid having to locate a compatible connection, a Dakota Digital BIM-01-1 may also be
used with most 1996 or newer OBDII compliant computer systems to provide a tachometer
reading. When using the BIM-01-1, select “BUS” for the engine cylinder setting.
To ensure that the ignition system does not interfere with any other dashboard functions,
do not run the tachometer wire alongside any other sender or input wires. DO NOT USE SOLID
CORE SPARK PLUG WIRES WITH THIS DASHBOARD SYSTEM. Solid core ignition wires
cause a large amount of electromagnetic and radio frequency interference which can disrupt the
system operation.
The tachometer is compatible with almost all gasoline engines. The engine cylinder
selection, display update rate, tach signal type, and RPM warning point can be adjusted in the
setup menu under “TACH”. If a diesel engine is being used, you will need a tach interface such as
Dakota Digital’s DSL-1 or DSL-2. Be aware of the cylinder setting when using computer outputs
or reading the tach signal from an ECU. Some GM LS1 engines require the tach to be set up for
a 4 cylinder, low voltage signal when reading from the ECU even though it is a V8 engine.
WARN
The WARN terminal is an output to activate a small light or relay for a red-line or shift
indicator. The output is ground-activated when the preset warn RPM limit is exceeded. This
output can turn on a 4 Watt or smaller 12V bulb or can activate a relay to turn on a larger bulb or
buzzer. To wire a warning light to this output, connect one wire from the bulb to 12 volt accessory
power and connect the other wire to the WARN terminal.

MAN 650314:D
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If you need the warn output to be “active high” or provide a +12V voltage to power
something larger than 4 watt, a standard 12V relay can be used to accomplish this.
86 87
85 30
DO NOT CONNECT
SPD +This terminal is used to supply power to Dakota Digital speed sensor SEN-01-5. This
supplies 5V DC to the sensor and should not be connected to anything else. Connect the RED
wire from the SEN-01-5 to this terminal.
If you are using a 1-wire VSS output from a computer or a 2-wire pulse generator, this
terminal should be left open.
***DO NOT use this terminal to power any other devices; it is a low current +5V output.
SPD SND
This is where the vehicle speed sensor (VSS) connects. The signal supplied to this
terminal will be used by the control box to calculate the speed reading on the display and also for
calculating and saving odometer mileage.
Dakota Digital supplies a 3-wire sensor for most of its kits; SEN-01-5. If you are using this
sensor, the WHITE wire is the speed signal; connect to SPD SND. The RED and BLACK wires in
the cable are power and ground (5V DC) and their connection is discussed in SPD + and SPD -.
For 2-wire speed sensors such as a cable driven pulse generator, the polarity of the wires
does not matter. Connect one wire to the SPD – (Ground) and the other to the SPD SND
terminal. The speed sensor ground wire should be brought back to the control box to ensure a
proper signal is received. Twisting the ground and signal wires around each other provides an
additional level of interference protection. The speed signal wire should not be routed alongside
tach, ignition, or other high current or high voltage wires.
For vehicles which have a vehicle speed signal from a transmission sensor or ECM, tap
into the VSS wire and connect it to the SPD SND. Consult a vehicle service manual or wiring
diagram to determine wire color and location.
To avoid having to locate a compatible connection, a Dakota Digital BIM-01-1 may also be
used with most 1996 or newer OBDII compliant computer systems to provide a speedometer
reading. When using the BIM-01-1, select “BUS” for the sender setting.
This system can accept 4,000 ppm – 128,000 ppm speed signals with room for
adjustment. The speedometer is fully adjustable and calibration is discussed in a later section.
***Failure to calibrate the speedometer may cause your odometer mileage to
increase very rapidly if the speedometer is reading too fast.
*** The speed signal wire should NOT be routed alongside ignition components,
tach signal, or other high current/voltage wires.

MAN 650314:D
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SPD –
This terminal is used for speed sensor ground. The wire color is BLACK on a 3-wire
sensor. This insures a proper ground as well as providing proper hook-up for a twisted pair of
wires, or a solid state sensor. Only ground the speed sensor here. If you are using a single wire
output from a computer for the VSS then this terminal should be left open.
SPD OUT
This terminal can be used to supply a speed signal to auxiliary devices such as a cruise
control or radio volume adjustment. The output is scaled to the input speed signal coming into
the SPD SND terminal. It can be set to 2,000 PPM or 4,000 PPM.
***If you are using the BIM-01-1 bus speed signal option this output will NOT work.
SW2 (-) or Tach switch
The SW2 terminal is used for selecting the various RPM, engine, and performance
displays and also for entering the demonstration mode. The SW2 input is activated by a ground
connection. The push button switch supplied (or any normally open, momentary switch) is wired
by connecting one wire to SW2 and the other wire to a ground. When the button is pressed and
released, the tach/LCD2 message display will change. When the button is pressed and held for a
few seconds, any re-settable information displayed will be zeroed.
To enter DEMO mode, press and hold SW2 while turning the key on. The system will light
up and say DAKOTA DIGITAL on the message readouts; release the switch and the system will
stay in demo mode until the power is cycled off and back on without the switch held. All back
lights will be on in demo mode and the needles will sweep back and forth on the gauges.
SW1 (-) or Speed switch
The SW1 terminal is used for selecting the various speed, distance, and warning displays
and also for entering the setup menu. The SW1 input is activated by a ground connection. The
push button switch supplied (or any momentary normally open switch) is wired by connecting one
wire to SW1 and the other wire to a ground. When the button is pressed and released, the
speed/LCD1 message display will change. When the button is pressed and held for a few
seconds, any re-settable information displayed will be zeroed.
ADJ SND
The ADJ SND terminal is an optionally used input that allows you to have control over the
dimming brightness. By default, the system will turn on the back lights when the DIM terminal
has power, +12V, but this level is adjustable in the Lighting setup menu. Using the ADJ SND
terminal allows you to have a dash mounted control to vary the brightness while the headlights
are on. This requires Dakota Digital’s DIM-1 kit; a stock headlight rheostat will not work.
The DIM-1 has a WHITE/BLUE wire and a BLACK wire. Connect the WHITE/BLUE to the
ADJ SND terminal and the BLACK to ADJ - ground. The dash mounted dimmer will only vary the
display brightness when the DIM terminal has power, +12V.
ADJ –
This terminal provides a ground reference for the optionally installed DIM-1 for dash
mounted dimming control. The BLACK wire will connect to the ADJ – terminal, the
WHITE/BLUE connects to the ADJ SND.
*This terminal should not be used for grounding any other sensors or devices as damage
to the control box will occur. If not using a Dakota Digital DIM-1, this terminal should be
left open.

MAN 650314:D
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WTR SND
The water temperature sender included with this system must be used. Other
senders will cause incorrect readings or damage to the control box.
The supplied sensor, Dakota Digital SEN-04-5, is a 100-300ºF(40-150ºC) temp sensor.
The sender mounts in the engine block, cylinder head, or intake manifold so that the end of the
sensor is in the engine coolant flow. It has 1/8” NPT threads and the included adaptor bushings
may be used to adapt it for various applications.
To avoid mounting an additional temperature sender on the engine, a Dakota Digital BIM-
01-1 may also be used with most 1996 or newer OBDII compliant computer systems to provide
an engine temperature reading. When using the BIM-01-1, select “BUS F” or “BUS C” for the
sender type.
The water temp sensor has two wires coming from the harness. The BLUE or RED wire
will connect to the WTR SND terminal, the BROWN or BLACK wire will connect to the WTR –.
Due to the construction of the sensor, readings at lower temperatures below 100 ºF may
be inaccurate. The sensor is designed to be accurate from approximately 100 ºF - 300 ºF.
WTR –
This is the ground reference used for 2-wire water temp sensors. This will connect to the
BROWN or BLACK wire from the Dakota Digital SEN-04-5. The BLUE or RED wire will connect
to the WTR SND terminal.
***DO NOT connect this terminal to any other devices
OIL + This terminal is used to supply power to Dakota Digital pressure sensor SEN-03-8. This
supplies 5V DC to the sensor and should not be connected to anything else. Connect the RED
wire from the SEN-03-8 to this terminal.
***DO NOT use this terminal to power any other devices; it is a low current +5V output.
OIL SND
The oil pressure sender included with this system must be used. Other senders will
cause incorrect readings or damage to the control box.
The supplied sensor, Dakota Digital SEN-03-8, is a 0-100 psi solid state pressure sensor.
The sender can mount on the engine block or in an oil pressure line off of the block. The sender
has 1/8” NPT threads. The included adaptor bushings may be used to adapt it for various
applications.
The oil pressure sensor has three wires coming from the harness, plus one bare shield
wire. The WHITE wire will connect to the OIL SND terminal, the RED to OIL + (5V DC), and the
BLACK and bare shield wire to OIL –. Do not route the oil sender wire alongside a spark plug
wire or other high current or high voltage wires. Doing so can cause incorrect or erratic gauge
readings.
If the oil pressure drops below an adjustable warning point, the reading will flash as a low
oil pressure warning. The default warning point is 10 psi. If the oil display shows in a LCD
message screen as “ - - ”, this indicates that the control box is sensing an open circuit, a short to
ground, or out-of-range error from the sender or sender wire. If the oil display shows “EEE” this
indicates that the control box is sensing a short to power or out-of-range error from the sender. If
either indication remains on the display, inspect the sender wire for damage, check the routing of
the sender wire, check the sending unit grounding, and check that the correct sending unit is
connected.

MAN 650314:D
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OIL – This is the ground reference used for three-wire pressure sensor. This will connect to the
black wire as well as the bare silver shield wire from the Dakota Digital SEN-03-8.
***The bare wire is the shield wire, connect this wire to the OIL – along with the BLACK
wire
***DO NOT connect this terminal to any other devices
FUEL +
This output is not typically used. It is a low current +12V supply for powering solid state
fuel sensors. Currently, it does not have an application for any Dakota Digital fuel level sensors.
***This terminal should not be used with a typical resistive type fuel sensor. For
most applications, leave this terminal open. Do not try to power other devices from this
terminal or damage to the control box will occur.
FUEL SND
The fuel gauge sending unit is not normally supplied because the display system can use
the existing fuel sending unit in the tank in many cases. The sending units that are compatible
with this system are as follows: GM, Ford, VDO, and Stewart Warner. It is also possible to
program a custom setting for senders that are not pre-programmed into the system.
Use the FUEL - and FUEL SND terminals and run a twisted pair of wires back to your fuel
level sensor. Connect the FUEL - terminal to the fuel level sensor body or a mounting screw to
insure the sensor is sufficiently grounded. The other wire is the sensor signal which goes to the
FUEL SND terminal.
If your wiring harness already has a single wire routed through the vehicle for the fuel
sender then it may be used. If using a wire from an existing harness, make sure that the wire
does not have power. The fuel sender gets power from the control box only. Fuel senders
reference their ground from the sender mounting plate.
The fuel sender type is selected using the fuel setup menu under “SENDER”. The settings
are discussed later in the setup section. Anytime the fuel level is below 10%, the reading will
flash as a warning of low fuel.
The fuel gauge will initially display “E” until the fuel sender type has been set, and a
message will be displayed that says to “set Fuel sender”. If the message display shows “ ---
%FUEL” this indicates that the control box is sensing a short to ground or out-of-range error from
the sender or sender wire. If the message display shows “EEE %FUEL” this indicates that the
control box is sensing an open circuit or out-of-range error from the sender. If either indication
remains on the display, inspect the sender wire for damage, check the routing of the sender wire,
check the sending unit grounding, and check that the sender selection is set correctly for the
sending unit that is connected.
FUEL –
Connect the FUEL - terminal to the fuel level sensor body or a mounting screw to insure
the sensor is sufficiently grounded. One terminal on the sensor is the signal which goes to the
FUEL SND terminal.
***For fuel level sensors that are attached to an electric fuel pump, or if you have an
electric fuel pump in the tank, make sure that the fuel pump is externally grounded to the
vehicle chassis. Attempting to ground the fuel pump to the Dakota Digital control box will
result in erratic operation and damage to the control box.

MAN 650314:D
12
CRUISE (-)
The CRUISE terminal can be used as a “cruise engaged” indicator. The CRUISE input is
activated by a ground signal from a compatible cruise control harness. Whenever the CRUISE
input is grounded, the system will display a small green “cruise engage” indicator.
WAIT (+)
The WAIT terminal can be used as a “wait to start” or glow plug indicator. The WAIT input
is activated by a 12 volt signal from the glow plugs. Whenever the WAIT input is powered with
+12V, the system will display “WAIT” on the LCD1 message display. This message can be
cleared by pressing and holding SW1, or once the WAIT terminal loses the +12V signal.
GEAR (1 wire)
The GEAR terminal is used for the gear shift indicator. The indicator is built into every
system, but will not light up unless a Dakota Digital GSS-1000/2000/5000 gear shift sending unit
is connected or a Dakota Digital BIM-01-1 with a compatible electronic transmission is used,
telling the system what gear the transmission is in. The gear shift sending unit is not included
with the system and must be purchased separately if desired.
The GEAR terminal will connect to the FIRST terminal on a GSS-1000 or to the 1-WIRE
terminal on a GSS-2000 or GSS-5000. Follow the instructions in the GSS manual for use with a
single wire display system. When the gear shift sending unit is connected, the gear name will be
shown on the LCD1 message display.
NOTE: The system will automatically change to the gear display for a few seconds
whenever the gear position changes, even if viewing a different message display.
4x4 (-)
The 4x4 terminal can be used on four wheel drive vehicles. The 4x4 input is activated by a
ground signal from a switch on the transfer case. Connect a wire from this terminal to the switch
on the transfer case. Whenever the 4x4 input is grounded the system will briefly display “ x
ON” on the LCD1 message display. When the signal turns off, the system will briefly display “ x
off” on the message display.
RIGHT (+)
The RIGHT terminal is activated by a 12 volt signal from the turn signal flasher. When this
terminal has 12 volts, a green arrow will light up on the display face. An existing wire from the
vehicle for the right turn indicator can be used or a new wire can be connected from the turn
signal flasher or power wire feeding the right turn signal bulb.
LEFT (+)
The LEFT terminal is activated by a 12 volt signal from the turn signal flasher. When this
terminal has 12 volts, a green arrow will light up on the display face. An existing wire from the
vehicle for the left turn indicator can be used or a new wire can be connected from the turn signal
flasher or power wire feeding the left turn signal bulb.
HIGH (+)
The HIGH terminal is activated by a 12 volt signal from the headlight high beam wire.
When the terminal has 12 volts, a blue high beam indicator will light up on the display face. An
existing wire from the vehicle for the high beam indicator can be used or a new wire can be
connected from the high beam side of the hi/low beam switch.

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BRAKE (-)
The BRAKE terminal can be used as a brake system warning indicator. The BRAKE input
is activated by a ground signal from the brake pressure switch on the master cylinder or from the
parking brake set switch. Connect a wire from this terminal to the pressure switch on the master
cylinder or consult a vehicle service manual to determine color and location of an existing wire.
Whenever the BRAKE input is grounded, the system will display “check BRAKE” on the LCD 1
message display. This message can be cleared by pressing and holding SW1. There is also a
red exclamation indicator that will illuminate on the display face when the terminal is grounded.
CHECK ENG (-)
The CHECK ENG terminal is used with fuel injection ECM’s to display engine problems
and trouble codes. The CHECK input is activated by a ground signal from the ECM. Whenever
the check input is grounded, the system will display “check ENGINE” on the LCD1 message
display. This message can be cleared by pressing and holding SW1. There is also a red check
engine indicator that will illuminate on the display face.
For certain ECM’s, when placed into diagnostic mode, trouble codes can be read by
counting the flashes of the check engine indicator. Consult a service manual for the fuel injection
system that you have for further information on trouble codes or if that is how your system
operates. With some ECM’s, a 12 volt light bulb may need to be connected in addition to the
CHECK input in order to provide proper current loading. Connect one wire from the bulb to keyed
power and the other to the CHECK input. In this case, both the bulb and our display system
indicator would come on when the check engine wire is “active”.
DIM The backlights and needles in the VHX systems are designed to illuminate when the
headlights are turned on. Connect the DIM terminal to the taillight or parking light circuit so it has
12 volts whenever the headlights are on. When power is applied to the DIM terminal, the
instruments will illuminate at a preset brightness level. When the DIM terminal does not have
power, the backlighting will be off, unless they’re enabled in setup to be on in day time operation.
The night brightness level is adjustable two different ways. This preset brightness is
adjusted in the setup menu “LIGHTING”. See ADJ SND for a description of the second method.
AUX. I/O
This jack is used to connect bus expansion modules (BIM). Do not attempt to plug in any
other device to this jack or damage to the control box will occur. This connector should be left
open, unless using a Dakota Digital product designed for it. Operation is discussed with BIM
units purchased separately from Dakota Digital.
DISPLAY CABLE CONNECTION
This is where the network/CAT 5 cable from the display system plugs into the control box.
All three connectors are exactly the same output so it does not matter which one you choose to
use. Some systems may have two cables leading down from the system and you will need to
connect both cables, and it doesn’t matter which one. Unused jacks can be left open.
Some systems may also need a cable connecting the two halves or multiple gauges in the
system together. If the back of the displays have more than one connector you will need to
jumper it to the other display that has only one. The shorter cable supplied in the kit is for this
connection.
***If you are purchasing a longer network cable to connect the display system to the
control box please make sure to get a CAT 5, CAT5E, or CAT6 “patch cable” and NOT a
“cross over” cable.

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SETTING UP THE CONTROL BOX
Below is the list of setup menus. You must have SW1 wired to enter setup, SW2 will be
used in some menus as well; descriptions of each menu are below. Pay close attention to
Setup menus and options as incorrect settings will cause faulty readings on the displays.
Main Menu Sub Menu Description____________________
SPEED
SENDER (normal, bus) Select sensor type
AUTO Auto calibrate speed
ADJUST Adjust the speed calibration
SERVICE (OFF, 500 – 7500) Select the service countdown
OUTPUT (2k ppm, k PPm) Select output speed signal PPM setting
DONE Exit setup menu
TACH
ENGINE (bus, 1 – 16) Set engine cylinder count
UPDATE (slow, mid, fast) Set RPM update rate
WARN (2200 – 1 800) Set RPM shift warning point
SIGNAL (5V LOw, 12V HIGH) Select RPM signal voltage level
DONE Exit setup menu
VOLT
WARNING (LOW 10.0 – 13.1) Set low volt warning point
DONE Exit setup menu
WATER
SENDER (DD F,DD C,BUS F, BUS C) Select sensor type
WARNING (150-300F / 65 -1 8c) Set high temp warning point
TEST Display sensor ohm reading
DONE Exit setup menu
OIL
WARN (LOW 5 – 36) Set low pressure warning point
TEST Display sensor voltage reading
DONE Exit setup menu
FUEL
SENDER (SW 33, CUSTOM, Select sensor type
GM 30, GM 90, GM 250,
F 10, F 150, V 180)
CUSTOM Calibrate custom fuel sensor
TEST Display sensor ohm reading
DONE Exit setup menu
LIGHTING
DIM LEVEL (ADJUST 0-31) Change preset night dimming
DAY LEVEL (ADJUST 0-32) Change day time backlighting
DONE Exit setup menu
BIM
SCAN Check/scan for connected modules
SETUP Enter setup (only when modules present)
DONE Exit setup menu
DISPLAYS
INDICATORS Enable indicators on face and LCD
(LIGHT ONLY, LIGHT+LCD)
LOCATION (1, 2, 1+2, OFF) Select display location
DONE Exit setup menu

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INFO
VERSION Current software code
SPEED CAL Current pulse per mile cal value saved
DONE Exit setup menu
Set ODOM Used to preset odometer reading
To enter the setup mode, press and hold SW1 while turning the key/ACC power on. The
display should light up and show SETUP on the speedometer/LCD1 and tachometer/LCD2
message displays. Release the switch and Setup SPEED should display on LCD1, this is the
start of the setup menus. Press and release Switch 1 (SW1) to advance through the main
menus. A press and hold will enter the sub menu. A press and hold is also used to save the
setting and jump to the next option, or exit a menu when DONE is displayed.
You can exit setup at any time by switching off the keyed power.
SPEEDOMETER SETUP/CALIBRATION
There are two main methods for calibrating the speedometer, Auto Cal and Adjust. Auto
Cal requires that you have one measured mile marked out. Adjust requires you to follow another
vehicle going at a set speed, use a handheld GPS with speedometer function, or time yourself
over a mile to determine your speed.
* It is simplest to start with the Auto Cal method to get the speedometer close. If you find
it’s reading too fast/slow after the Auto Cal, then attempt the Adjust mode.
Press and hold SW1, then turn the key on and start the engine. Once the engine is
running, release SW1. “SEt SPEED” should be displayed. Press and hold the switch until
“SPEED SENDER” is displayed to go into the speed setup menus, release SW1.
Now you can press and release the switch to scroll through the sub-menus, “sender”
“auto” “adjust” “Service” “output” “DONE”. When you get to the desired sub-menu, press
and hold the switch to select it.
Speed sensor setup (SENDER)
This menu is used to set the speed sensor input type. You can use the supplied pulse
generator or existing speed sensor for most applications. You can also read the speed signal with
the use of a bus interface module (BIM). Dakota Digital offers a BIM that will allow you to read
the speed signal from an ECU if you are installing the system in a vehicle equipped with the
OBDII port or a drive train from a newer vehicle; most 1996 and newer vehicles have this.
If you are using a Dakota Digital pulse generator or feeding an ECU signal into the SPD
SND terminal, this is considered a normal
normalnormal
normal signal.
When “speed Sender” is displayed, press and hold SW1 until the message screen
changes.
Release SW1 and the current sender selection will be displayed.
Press and release SW1 to toggle between “normal”and “BUS”.
When the desired setting is displayed press and hold SW1 until “DONE” is displayed
Release the switch to go onto the next sub menu item.

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Auto Cal (AUTO)
This menu is used to calibrate the speed signal by driving a measured mile. Start this
procedure with the vehicle stopped at the beginning of a known measured mile. Shut the car off,
press and hold SW1 and turn the key on and start the car then release the switch to get into
setup once the car is running. Then select the speed setup menus.
When “speed AUTO” is displayed press and hold SW1 until you get “SPD Pulses 0”
Release SW1 and the speed/LCD1 message display should read “SPD Pulses 0”, LCD2
will read “Setup”. The other gauges should display the current readings (tach, fuel,
volt, water, and oil). Stopped at the beginning of the measured mile, the “SPD Pulses
0” reading should stay at “0” until you start driving. If this is number is increasing while
stopped, you have something wired wrong or are picking up interference; please check
connections and wire routing before continuing or you will have incorrect readings later.
Begin driving the measured mile.
The “SPD Pulses x” reading should start to increase as you travel, indicating the pulses
received from the speed sensor or VSS. This is known as the pulses per mile (PPM).
The acceptable range for this is about 2,000 – 250,000.
Once you reach the end of the marked mile, or are passing the marker, press and release
SW1. The readings will zero out, then everything should move up to the correct values
and the speedometer should now be displaying your current speed.
Auto Cal is now complete and your speedometer should be reading correctly.
NOTES: You do not have to drive at a constant speed nor do you have to avoid stopping
during Auto Cal. When completed, you do not need to stop; you may, but you can also
just press and release SW1 as you pass the one mile mark.
The message display cannot be used to determine when the mile has been driven; it’s only
there as a reference to indicate pulses are coming into the control box. Even if you have
an 8,000 PPM sensor you may calibrate at 9xxx PPM (for example) due to gearing and tire
size.
Also be aware that the odometer is calculated from the speedometer cal value; if it is not
calibrated properly, the odometer reading could be higher/lower than actual.
***If you do not receive more than 2,000 pulses during calibration the unit will error out
and display a brief “
pulse to low
pulse to lowpulse to low
pulse to low ” message and revert to a default PPM setting.
Adjust Mode (ADJUST)
Adjust is slightly different depending on what your input signal is selected to in the
SENDER menu.
When “adjust” is displayed, press and hold SW1 until the message screen changes.
Release SW1.
If “normal”is selected for the sender type, it will allow you to adjust the signal that is
being supplied to the SPD SND terminal coming from a pulse generator or ECU. The fuel, volt,
oil, water, and tach will operate normally. The speedometer will show the speed reading and the
speed/LCD1 message display will say “xx ADJ MPH”. Begin driving at a known speed. Press
and hold SW1 to increase the speedometer reading, the next press and hold of SW1 will
decrease the speedometer reading. You can continue adjusting up and down as needed until the
reading is correct. When the speedometer is correct, stop and restart the system, by turning the
key/power off and then starting the vehicle back up. The new calibration will be saved when the
there is no switch press for eight seconds.