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              MAN 650314:D 

27 

LCD MESSAGE CONTRAST ADJUSTMENT MENU 

 

In some cases, mainly in systems where the message center would be mounted further 

apart from one another or at different angles in the dash, you may want to adjust the contrast of 
the LCD for better visibility.   By default the contrast is set about midway and this setting should 
be acceptable for most applications, but you can change it for individual preference. 
 

The contrast menu is a hidden menu since it typically shouldn’t need adjustment, to get to 

the menu: 
 
Press and hold SW1 while turning the key on.  Release the switch.   
The LCD1 message should display “

setup speed

” and the LCD2 message should read “

setup

” 

To access the hidden contrast menu, press and hold SW2 until “

contrast adjust

” appears on 

both LCD screens, then release SW2.   

Now if you press and hold SW1 a contrast bar will display and the contrast will change while the 

switch is held, the next press and hold of SW1 will decrease the value.  You can continue with 
the press and hold and release to scroll up and down and adjust the contrast to your liking.  

Once happy with the setting; release the switch and the screen will go back to “

contrast 

adjust

” after there is no switch press for about three seconds.  

If you have two LCD message centers use SW2 to adjust the contrast on LCD2 following the 

same method as above.  

After no switch presses for about ten seconds, contrast adjust mode will be exited and you will be 

returned to the next main setup menu.  If you are unhappy with the contrast, simply 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 system.  

Please follow the wiring and setup instructions to insure you have your system calibrated and 
connected properly for your application.  Avoiding setup or selecting incorrect options as that will 
cause the gauge readings to be incorrect.

  

 

 
All of the VHX systems have the obvious gauge sweeps, but the biggest difference 

between the VHX series and other analog style gauges are the information or message displays.  
Each VHX system has two message displays, although some systems may have one large 
display.  Display 1 is typically in the speedometer gauge or under it in dual display systems and 
Display 2 is usually under the tachometer.  For systems with a larger single display message 
center, the top half of the large display is considered Display 1 and the bottom half Display 2.   
 
The message displays can display a wealth of auxiliary information as well as warning messages 
and even 16 additional channels with the use of the separately purchased BIM units, bus 
interface modules.   

 

 

You must wire the momentary push button switches in order to access the different 

message screens.  The message displays are accessed using the supplied push-button switches. 
Switch 1 (SW1) will toggle between the speed/LCD1 message displays and Switch 2 (SW2) will 
toggle between the tach/LCD2 message displays.  The switches must be wired to access setup 
menus. It is recommended that you mount them in a spot easily accessible while viewing the 
displays and gauges.  
 
By default the available messages for each message display are: 

Summary of Contents for VHX-66C-NOV

Page 1: ...it 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 D...

Page 2: ...used 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 mount...

Page 3: ...d 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 sligh...

Page 4: ...strument 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 c...

Page 5: ...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 6: ...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 7: ...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 8: ...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 9: ...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 10: ...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 11: ...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 12: ...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 13: ...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 14: ...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 15: ...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 16: ...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 17: ...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 18: ...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 19: ...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 20: ...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 21: ...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 22: ...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 23: ...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 24: ...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 25: ...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 26: ...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 27: ...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 28: ...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 29: ...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 30: ...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 31: ...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 32: ...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 33: ...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 34: ...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 35: ...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 36: ...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 37: ...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 38: ...MAN 650314 D 34...

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