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What are the Functions of the Factory Brake Controller Wiring Harness on a 2012 Toyota Tacoma  

Question:

2012 tacoma, factory supplied harness.. were does the brown ground wire go?? says to trailer ground?

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Expert Reply:

The functions of the Toyota factory brake controller harness should be as follows:

Brown = ground, connects to brake controller white
Black with red = 12 volt power, connects to brake controller black
Green with white = stoplight input, connects to brake controller red
Red = output to trailer brakes, connects to brake controller blue
Solid green = not used

expert reply by:
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Michael H

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