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Old August 10th, 2022, 12:36 AM
Scrapcan Scrapcan is offline
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Join Date: Apr 2022
Location: Burns, WY
Truck: 1963 GMC 2500 dump bed
Posts: 29
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Default headlight switch wiring for 1963

ok slowly muddling my way through the issues. I know the wiring is all good, check all wires and harnesses. Long story but it has been done, harnesses have been out of the truck, opened up, visually verified, continuity verified, wires/insulation verified, and wiring is as it should be.

The issue is that I put in a new headlight switch from Napa and I do not have gage lights or tail lights when the headlights are on. They work in the first detent for the tail and markers.

What should I be looking at here? Bad new switch? Do I need to make a modification similar to the fix to have tails and markers on at the same time? would that make them not work if I did the mod shown on Jolly’s site?

I will pull the switch and open it up, since it is electrical I cannot take it back anyway.

Any help is appreciated

Last edited by Scrapcan; August 10th, 2022 at 02:28 PM.
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