Red Bank
Senior Member
I am working on a 1969 Chevy single axle dump truck with a 2 speed axle. A guy brought it to me to run new wires to the axle and replace the switch. The switch is missing and the wires looked ok. My question is I have never messed with one of these before and after looking at it I would assume that since it is an electric motor that to shift it from low to high and back to low the motor would turn one way to high and then reverse itself back to low? Which the only way to reverse the motor would be to for the positive wire to become negative and the negative wire to become positive which means it needs a special switch to accomplish this? Am I on the right track or I am overthinking this? The guy just bought the truck like this and I would like to test the 2 speed first before I rewire and install new switch to find out the motor on the axle is bad. Any and all comments welcomed!