i have a mobility scooter (JP Cruiser - HCF305) that has a 24v motor with four wires. Two heavy gauge wires, one red, one black. and two light gauge one red, one black. the scooter has a forward, neutral, reverse (F-N-R)switch that i think is broke. the motor only runs one direction. the F-N-R switch routes thru an electric controller box. the 4 wires to the motor come out of the controller. my question is what do the motors 4 wires do? FYI, the F-R-N switch is 3 wires to the controller. the switch also has a hot wire from the key switch. what do the F-R-N 3 wires do? thanks for your help, i need to get my mobility back.