Question about 2000 GMC Sierra
I have both turn signals on my 7-way plug but I have no brake lights. I follower the harness back to the cab and could not find a problem. Please help
Do you have brake lights on truck? Is this a new hook-up or has it been hooked up before & worked fine? If your brake lights on truck are one color (red) and your turn signals are another (amber) you will need to buy & connect a small converter that goes in harness to plug in order to separate the 2. Instructions with converter are pretty simple.
Posted on Jul 20, 2009
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Posted on Jan 02, 2017
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Right Turn & Brake
Left Turn & Brake
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.
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