I hooked it up exactly like it said, found pictures online showing exactly where to hook up each. There was 2 options with the red wire hook up. Both of them I followed exactly. That's why I am confused about it. I'm not a mechanic, even though I like to work on my truck and usually don't have...
I have a 99 gmc Yukon 4wd (old body style). I installed a 7 blade trailer wiring harness and break controller. The switch from 4 prong to 7 blade was easy. Red and orange wire was already ran. The brake controller harness is my problem. I did all the research I could to make it easy. Orange wire...
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