Im trying to get the interior lights working on the cat. The sail panel bulbs are GE #90. Single filament but two terminals on the base like an 1157. Same set up as a convertible rear interior light. I have two wires going into the socket. White and an orange with a white tracer. Both wires have 12 volts on them. The shell of the socket has a ground on it. Now when I bench test the bulb and put 12v on both terminals and ground the brass, nothing. If I put 12v on one terminal and a ground on the other, the bulb lights up. So bulb works So it seems like the white wire should have a ground on it not 12v. Am I missing something here? I need a wiring diagram to see where the wire white gets its power from . Or should it?