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Dakota Digital VHX-78C-MC, Manual, Page: 1 / 42

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Dakota Digital VHX-78C-MC Manual Download Page 1

650374 

 

VHX-78C-MC 

Dakota Digital VHX Instrument Installation for: 

1978-‘88 Chevy Monte Carlo 

1978-‘88 Chevy El Camino/GMC Caballero (will not fit clusters with sweep-style speedometer) 

1978-‘83 Chevy Malibu (will not fit clusters with sweep-style speedometer) 

 

Your new VHX-78C-MC kit includes: 

 

 

 

 

 

 

 

 

 

 

 

 

Installation 

 

 

 

 

 

 

 

 

 

 

Control Box 

CAT5 Cable 

 

Universal 

Sender Pack 

Installation Manuals

 

VHX Display 

1.   Remove the seven screws securing the bezel. Retain these screws.

 

1/8” Plastic Spacer

 

Summary of Contents for VHX-78C-MC

Page 1: ...ill not fit clusters with sweep style speedometer 1978 83 Chevy Malibu will not fit clusters with sweep style speedometer Your new VHX 78C MC kit includes Installation Control Box CAT5 Cable Universal...

Page 2: ...securing the blackout plate and lens to expose the factory gauges These screws will be reused 3 Remove the factory gauges by removing the screws shown in the picture below Your cluster may vary depen...

Page 3: ...into the dash taking care to align the mounting holes with those in the stock dash Remove the protective tape from the lens 4 You should be left with a bare housing Remove all light bulbs and electric...

Page 4: ...lls SD 57107 Phone 605 332 6513 Fax 605 339 4106 www dakotadigital com dakotasupport dakotadigital com 7 Separate the stock lens from the blackout plate the original lens is not needed Place the black...

Page 5: ...ill not fit clusters with sweep style speedometer 1978 83 Chevy Malibu will not fit clusters with sweep style speedometer Your new VHX 78C MC kit includes Installation Control Box CAT5 Cable Universal...

Page 6: ...securing the blackout plate and lens to expose the factory gauges These screws will be reused 3 Remove the factory gauges by removing the screws shown in the picture below Your cluster may vary depen...

Page 7: ...into the dash taking care to align the mounting holes with those in the stock dash Remove the protective tape from the lens 4 You should be left with a bare housing Remove all light bulbs and electric...

Page 8: ...lls SD 57107 Phone 605 332 6513 Fax 605 339 4106 www dakotadigital com dakotasupport dakotadigital com 7 Separate the stock lens from the blackout plate the original lens is not needed Place the black...

Page 9: ...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 odome...

Page 10: ...e 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 setta...

Page 11: ...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 Sp...

Page 12: ...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 el...

Page 13: ...M 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...

Page 14: ...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...

Page 15: ...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 comp...

Page 16: ...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 con...

Page 17: ...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...

Page 18: ...he 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...

Page 19: ...ehicle 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 re...

Page 20: ...stem 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...

Page 21: ...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 park...

Page 22: ...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...

Page 23: ...he 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 display...

Page 24: ...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 determi...

Page 25: ...d setting is displayed press and hold SW1 until DONE is displayed to save the value Speed Output OUTPUT If a speed signal is needed for an ECM or cruise control the SPD OUT terminal can be used This t...

Page 26: ...y averaging The value can be changed from slow mid or fast When UPDATE is displayed press and hold SW1 to enter the UPDATE setup menu Release SW1 and the current update rate will be displayed Press an...

Page 27: ...switch to go onto VOLT DONE Press and hold SW1 to exit VOLT setup menu WATER TEMP SETUP The Water Temp setup allows you to select the units the temperature is displayed in Fahrenheit or Celsius It als...

Page 28: ...ess and hold SW1 until DONE is displayed Release the switch to go on to the next sub menu item Temp sensor test test This menu will allow you to check the resistance the control box is reading from th...

Page 29: ...n changes Release SW1 and the current warning point will be displayed as oil warn low xx where xx is the current warning point Press and release SW1 to change the value from LOw 05 low 36 When the des...

Page 30: ...The table above shows the seven options and resistance ranges as well as the custom option When fuel sender is displayed press and hold SW1 until you get sender xx xx where xx xx is the current sensor...

Page 31: ...FUEL test is displayed press and hold SW1 until the message screen changes Release SW1 and the current resistance from the fuel level sensor will be displayed as test fuel xxx ohms where xxx is the re...

Page 32: ...tting to 32 will only enable the LCD message backlights Next press and release SW2 to save setting Yes you have to use SW2 to save Exit lighting setup done This will allow you to exit the lighting set...

Page 33: ...any attached BIM modules Once scanning is complete the LCD message screens should be lit with the messages LCD1 and LCD2 on the screens This is to provide a reference of which LCD is which screen Once...

Page 34: ...ce the odometer has more than 100 miles this menu option will no longer be displayed Make sure you have correctly calibrated your speedometer so you don t have to worry about racking up too many extra...

Page 35: ...ply press and hold SW2 to access the menu again from any one of the main setup menu screens NORMAL OPERATION AND FUNCTION Here we will describe the common functions and normal operation of the VHX sys...

Page 36: ...current reading if it can be reset Also press and hold of the switch while the clock is displayed will enter clock set mode If you have the system powered up in normal mode you can scroll through the...

Page 37: ...l and 12v to ACC power terminal when the key is on Control box may not be getting Check if the control box has a ground a proper ground connection Do not use a battery charger to power the system The...

Page 38: ...ed signal wire wire away from the speed wire speedometer reads higher There is a ground problem between Make certain the ground wire for than zero the speed sensor and the control the speed sensor is...

Page 39: ...he sending unit wire from up noise from nearby wires motor and ignition wires The sending unit is not Use the sending unit provided with compatible with the control box the display system The gear shi...

Page 40: ...t to ground The display system starts SW2 terminal is constantly Disconnect or replace the up in the demonstration connected to ground SW2 switch mode and remains in it The clock doesn t keep Constant...

Page 41: ...the dated sales receipt from your place of purchase Send no money We will bill you after repair Dakota Digital Limited Lifetime Warranty DAKOTA DIGITAL warrants to the ORIGINAL PURCHASER of this prod...

Page 42: ...MAN 650314 D 34...

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