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Old 09-27-2012, 07:35 AM
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Jeep Comanache 1989 pickup dash lites problem

Hi, I have a Jeep Comanache 89 pickup ,my dash lights went out on the vehicle and so did my rear tail lights .Everything else works ,head lights ,blinkers,flashers ,reverse lights .Changed out the light switch but still have the same problem . Don't know where to go from there . Any help would appreciated.

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Old 09-28-2012, 02:50 PM
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Using a test light, probe all the fuses to make sure all have 12 volts.
Make sure the bulbs are good.

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Old 09-28-2012, 04:31 PM
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I'd say you have lost a ground somewhere, attach a wire to a solid ground and touch the other end to the tail light bulb socket/housing...... if it works then you'll need to inspect and clean your grounds
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Old 09-28-2012, 05:14 PM
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Sounds more like a problem in the fuse box. The tailights power comes from the headlight switch, but passes through the fuse box at the tailight fuse. Also the instrument panel lights are fed through the fuse box again from the fused side of the taillight fuse, through the instrument panel fuse, then to the dash (instrument panel)
If the tai lights fuse is blown or has an open circuit ( no power) the dash lights also go out.
Tail light wire should be brown.check it at the headlight switch with the switch on.
There may be a connector between the fuse box and the headlight switch, each connection is a potential for trouble.
It would be a good idea to have your buddy watch the lights as you work on them. If they come on when you are working on them , your buddy can holler at you , that way you know you are getting close to the problem.
Fact is stranger than Fiction
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