Good advice above. Addtionally, as someone said, check behind the breaks for the wire conection. Sometimes they pull loose or you can re do the conections. Next is if the wire goes through the axel, check to see if the wire is worn through when it enters and exits the axel. I had a problem on mine and it was easier to re run the wires from the front toung box. Its not hard and is probably easier then chasing down a broken wire. But first thing is to seperate weather its the TV or the TT. You should have a ground to the frame somewhere on the trailor. Its not a bad idea to clean it up.