Hello I need help! lol I'm restoring my dads ole '64 C10 . I have an issue and really 'Im usually good with electrical. Okay here we go. I have tail lights, blinkers but no brake lights. The switch is good I have 12.48 volts at the rear Yellow and green wire. When I hook up the 3 prong plug going to the tail light I have nothing. I have cleaned the bulb sockets and I have good ground for blinkers or tail lights (running) wouldn't work . I am lost.
