Do you own a test light? If not get one! First test, key on engine off, unplug the three wire connector at the neutral safety switch & check for power on either of the outer wires...If you have power try putting a jumper from that wire to the other outside wire...then check the lights...If you don't have power check your fuses...If you have power but the lights don't come on with the jumper, leave the jumper in place & test for power at the B/U light sockets...if you have power either you have bad bulbs or a ground problem...No power? Check for power at the connector behind the drivers kickpanel...If no power there check the bulkhead connector... Maybe there's a reason some guys don't like electrical problems...