Hi, i am trying to hook up my trailer lights, my 96 ranger has a trailer connector kit installed, but no power at the plug. Harness is probably 8 yrz old or so. Could this be a fuse problem? If so what fuse controls power to this? I do have all tail lights, brakes, and turn signals, but no power to the harness plug. Or could it be the harness? Do these go bad?