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Old 06-11-2021, 12:05 AM   #1
71 C20 CS
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Headlights, dash lights & front side markers not working

All three just stopped working. After they stopped working I did a ground up rebuild on the front end and installed a new front wiring harness so I know itís not up there, I also put in a new headlight switch, didnít fix the problem either, checked the wiring plug to the switch and it has power.

Is this a ground problem? The parking and tail lights are part of the switch and they work. Any insight would be greatly appreciated.
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Old 06-11-2021, 11:53 AM   #2
body bolt
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Re: Headlights, dash lights & front side markers not working

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Originally Posted by 71 C20 CS View Post
All three just stopped working. After they stopped working I did a ground up rebuild on the front end and installed a new front wiring harness so I know itís not up there, I also put in a new headlight switch, didnít fix the problem either, checked the wiring plug to the switch and it has power.

Is this a ground problem? The parking and tail lights are part of the switch and they work. Any insight would be greatly appreciated.
Are you getting power to the switch? Through the switch? To the HL? If not, work backwards.
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Old 06-11-2021, 07:51 PM   #3
BigBird05
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Re: Headlights, dash lights & front side markers not working

If the park and tail lights are working it isn't a ground problem.
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Old 06-11-2021, 10:41 PM   #4
71 C20 CS
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Re: Headlights, dash lights & front side markers not working

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If the park and tail lights are working it isn't a ground problem.
Yes, the parking and tail lights work. Do you think it could be the printed circuit board?
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Old 06-11-2021, 11:33 PM   #5
davischevy
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Re: Headlights, dash lights & front side markers not working

It's your headlight dimmer switch.
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Old 06-12-2021, 01:31 AM   #6
BigBird05
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Re: Headlights, dash lights & front side markers not working

If you have power to the head light switch ( big red wire ) then it is the head light switch that has gone bad.
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Old 06-12-2021, 06:33 PM   #7
71 C20 CS
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Re: Headlights, dash lights & front side markers not working

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It's your headlight dimmer switch.
Well, that worked for the headlights, thank you! Front side markers and dash lights still not working......
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Old 06-13-2021, 12:11 AM   #8
71 C20 CS
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Re: Headlights, dash lights & front side markers not working

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It's your headlight dimmer switch.
I stand corrected! I waited until it was darker and the dash lights are working and so is one one the side markers, I assume the other has a burned bulb. Thanks for your advice!
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