Hey guys, I am having trouble with my trailer brakes. They are the standard electric controlled magnet brakes. I have a 94 f250 factory turbo truck with the factory brake controller plug and play hook up. All of my wires are reading proper voltage when they should....except for the brake wire. When I am not pushing the brakes I am getting 4.5 volts going to the trailer brakes....when I unplug the brake controller I get no voltage at the brake wire. What in the world could cause this? I am getting constant 12 volts on the black wire like I should. The problem with this is that the brakes lock up while I am driving. I need to use the trailer tomorrow. Do you all have any ideas? Thanks.