Hey guys. New to the site. I have got a problem and need some help. I have a 2000 chevy k2500 4x4 (old body style). I got a trailer to carry tools for work. I installed a trailer brake controller. I followed the instructions found all the wires. (I think?) One wire is connected to the brake pedal wire so i found a wire under the dash and tested it. it had power when the brake was pushed. so i thought i was good. so i finished the install and took it for a spin well every time i turn on the left turn signal the brakes lock. so did i get the wrong wire? if so what color wire should I be looking for? or do i have a open ground somewhere? Thanks for all the help.