Hi everyone! I recently bought my first pinball machine. It’s a 1973 tropic fun (also gulfstream) by Williams. I managed to get almost everything working on it except my playfield lights. I tested my bulbs in a socket in the back box that I know works and the bulbs were fine. I checked continuity throughout the playfield and that was fine too. I was also able to read 10-11 volts coming out of the light bulb sockets when the game was on. What am I missing here?