With a 13 year old truck am i wise to just replace both sides wiring harness and the juntion block or is that just likely a waste of money.
Tail light harness junction block silverado.
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Start testing direct at the incoming harness with a test light and verify all your signals and lights are working to that point.
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If the left side is fine i know that the wiring to the rear junction block is okay.
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The signal light and brake light work just not the running light on this side only.
I went and bought 2 new bul.
All lights on the right side work except for the tail light.
Iff all works at that point then plug the main back in and start testing at the left and right plug ins on the junction block.
Another thing to try is pull all the plugs out of the junction block.
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There are two bulbs both are dual element and i figured it was strange that both went at the same time.
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Apdty 756760 wiring harness pigtail connector 7 way wire leads fits tail lamp or instrument cluster junction box on escalade avalanche silverado sierra suburban tahoe yukon h2 replaces gm 15306339 acdelco 88986855 gm original equipment passenger side tail light wiring harness.