backup lights don't light

check you wireing have the lights on and wiggle the wires it could have a brake in the wire any where in the line or a rust spot, if u find that it blenks when u wiggle it then wiggle little section at a time till you narow it down the turn off the power cut the wires where the brake is and strip the wires and huck them back up. dont tuck the rong ends togather or it could spark and cover the ends with electrick tape .