Question about GMC 2004 Yukon XL 1500 Denali
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Posted on Jan 02, 2017
SOURCE: My turn signals don't work.
Maybe there's a crossed wire somewhere because there should be a separate flasher for the turn signals vs. the hazard lights.
Also, the multifunction switch if it has one may be bad for the hazard lights and the turn signal combination somehow. I'm not sure, because I've never heard of this particular problem before.
The logic must be messed up in the switch or it's the wiring.
Posted on Sep 20, 2010
SOURCE: Have issues with trailer lights.
Standard wiring colors are as follows: 4-Way 5-Way 6-Way 7-Way Green Yellow Brown White Red Blue Purple Right Turn & Brake Left Turn & Brake Tail Lights Ground Backup Lights Electric Brakes Auxiliary Power
Green- Right Turn and Brake
Yellow- Left Turn and Brake
Brown- Tail Lights
Red- Reverse (Back Up) Lights
Blue- Electric Brakes
Purple- Auxiliary Power
It sounds like your green and yello wires are shorted together somewhere along the length of the harness. I would check the wires on the trailer first. Easier yet, if you have another trailer to connec or access to another to use for testing, connect to it and see if the problem repeats; if it does the trouble is in the vehicle's wiring.
Right Turn & Brake
Left Turn & Brake
Posted on Jun 26, 2011
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