Rear lights work except for the backup. The bulbs and socket checked out ok, then I checked the backup light switch at the tranny and that checked out ok. The switch is a two prong, but the socket has three female connectors and three wires coming from it. I assume the center female connector is the ground wire?? The wire colors are pink and yellow. The center wire is an off yellow color with a white stripe. I traced the wire harness from the tranny and noticed that the wires had been cut and were just coiled up. The wires coming off the lights go through the back seat. I have not traced those wires, but am looking for advice on where I go from here. I know very little about electrical. I would appreciate advice. The car is a 1973 Cuda. Ive only had the car for a month. It is a non-numbers matching car. The engine was previously changed from a 318 to a 383 and the tranny was changed from a 3 speed on the floor to a 4 speed. Any assistance would be greatly appreciated. I am new on this site and this is my first post. Thanks