Originally Posted by 77HossF250

First, thanks for all the help from everyone. I found and fixed the problem. Someone before i got the truck put a jumper wire from the brake signal wire to the controller output wire. They did this in the pigtail from the main harness to the controller plug and retaped with electric tape. The tape job was almost a factory looking job but not quite, I barely found it. They were contolling the trailer brakes off the brake light cicuit. I was lucky the wiring wasn't fried. Thanks again.