Question about GMC Envoy

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I have a 2006 GMC Envoy and I am having a problem with my passenger turn signal on my boat trailer. The brake lights and parking light work fine. The lights are LED. I have tested the plung on the harness at the bumper and all leads are fine except the one that controls this turn signal.

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Is trailer lite fixture grounded good try and wiggle fixture when u hit signal. next try wiggle pig tail on trailer , still no signal. it must be wire from truck, trace back to connection and check all splices. to see if signal light works on trailer unhook pigtail and get a battery charger or another battery, connect a jumper from positive side to signal spot on trailer hook up. hook up ground as well see if light works if not its in the truck for sure.

Posted on Apr 01, 2011

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Posted on Jan 02, 2017

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ok tdknutson, I'm not clear on this, does the truck left turn signal stop working when u plug the trailer in, or is it the trailer left turn signal that's not working, or both? When u plugged in the test light did it show u had power to that plug in? Let me know the answer to the above, and in the meantime, check the ground on the turn signal at the trailer. Make sure it's not loose, and tightly connected to the frame (or wire). Also, what type plug in do u have? 4, 6, 7 wire?

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