QuestionI have hear a 90 GMC 2500. I am tring to make the trailer brakes work, I tested power to the brake switch and have nothing. But still have brake lights I can make the Trailer brakes work by forcing power via a fuse tap to the switch wire, but they are on constantly with key on. Any helpful hints.
Answeryoull have to find out how your regular brakes are wired, and you will have to tap into the wire that makes the tail lights light up, and that should work.
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i am just curious as to if this worked. Let me know, if it did, or if it didnt, if it didnt work, what have you done? and have you go it working yet?
