Service manual

TROUBLESHOOTING GUIDE
This is a list of some problems and their solutions which may be encountered when installing your
instrumentation system. If you cannot determine what the problem is or how to solve it, please call our
technical assistance line [phone].
* A note on vehicle grounding. *
The most common cause of problems with electric gauges is poor ground connections. The
engine block has the highest ground currents of any point in the vehicle. The ignition system, electric
gauge senders, starter, alternator, etc. all use the engine block for a ground point. Since the alternator is
grounded directly to the engine block all ground currents in the entire vehicle must pass through the
engine block while the engine is running. A weak or loose connection can cause all kinds of random
problems that may difficult to track down. The engine block should have heavy ground straps to both the
chassis and the body. The main negative cable from the battery should be connected directly to the
engine block.
Symptom Possible Problem Solution
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System does not light up. Control box may not be getting Check if the control box has
power. 12 volts connected to it.
Do not use a battery charger to
power the system.
Check the fuse inside the control
box. If it is blown, replace with a
2 amp fuse.
The display system may not be Insert the connector on the
getting power. display system wiring harness
into the slot on the side of the
control box. Be sure the pins
line up properly.
Check the display system wiring
harness for broken or cut wires.
The control box may have Return the control box to Dakota
an internal problem Digital with a description of the
problem and a phone number.
A display shows dashes. The sending unit for that display Check the wire from sending unit
is not connected to the control to the control box for breaks.
box. Make sure that the sending unit is
wired to the correct terminal.
Make sure the sending unit is
grounded properly.
One display does not If the circle in the upper right Return the display panel to
light up. corner of the display is white, Dakota Digital for repair. Include
the display is cracked or broken a phone number and address.
The tachometer will not The control box is not connected Make sure the control box is
show a reading. to the engine properly connected to your particular
system properly.