I'm helping a friend with a 36 volt Club Car he just got. s/n A9403 365918, supposedly a 1992, but this has a speed controller, which I read here didn't start till 93. I have a wiring diagram labeled 93 Club Car DS electric, hope it's the one. In any case, it won't run. Batteries are good, solenoid was replaced and clicks has 36 volts on both sides of the solenoid when activated, motor checked out according to instructions on sheet, controller replaced (not sure of source), no joy. We need to start tracing things out; any advice on where to start?