I have a 66 chevelle ss and the driverside backup light not working. I've put a test light to the wire end at socket and I have power there. But no power when I touch the prongs on the socket. I'm assuming socket is bad. I've looked at OPG,yearone,NPD catalogs for just a socket. They don't have. Neither does my local parts store. Does anyone know where I can get a socket? Or, am I going to have to buy the whole harness from the intermediate? Note car is a 4speed and I have replaced bulb twice to be sure.