I have a 2009 Yamaha G29 golf cart that won't move. The cart has a flight systems controller and red dog motor. Solenoid clicks and cart will attempt to move. The throttle pot has the 5 volts on the wire,until you plug the throttle pot into the harness. The voltage drops off to .06 volts. 3wires on plug,1(orange) supposed to have 5 v.,1(black) is a negative,1 (blue)is the control wire. Anyone ever ran into this? 2 repair shops can't fix it.