2nd Gen Non-Engine/Transmission Electric Trailer Brake Wiring

[mavrick1]

Got a question about the electric trailer brake wiring that is part of the trailer tow package. I don't have a trailer brake controller, so what happened seemed kinda strange. I borrowed a cargo trailer (equipped with electric brakes) from my church. It has a 6 pin round plug so I bought a 7-to-6 round adapter so I could plug it into my truck. I checked to make sure the wires were all correctly connected through the adapter. Since I don't have a brake controller (yet) I figured I would have the lights and not the brakes. When I went to take off, the trailer brakes were locked up solid. I remedied the problem by disconnecting the brake control wires inside the 7-to-6 adapter. Question is, why are the trailer brakes locked up when I don't even have a brake controller. BTW, not having the trailer brakes hooked up isn't a big deal because I won't be loading it that heavy anyway.

Thanks for the help in advance,

Lance

 

[ntillm01]

I used to install trailer hitches and the most common thing I learned was how UNcommon everyone wire their trailer. Wire colors are pretty consistent on the vehicle side, but different conventions are used in the RV world, the cargo trailer world and the boat/snowmobile trailer world. People will wire up a 6-pin and make it work for one trailer/truck combination, but go to another truck and it can be a differnt story.

Long story short, I bet the trailer connector is wired such that the brake wire go to where the B+ feed is at the truck.