The reverse stopped working on our golf cart but it still goes forward. We had an incident that melted one of the battery cable wires and after we replaced it the reverse no longer worked. We hooked the buzzer back up and it doesn’t work either. We have replaced the controller and the solenoid. We tried flipping the wires on the F&R switch, but it still only goes forward. What could it be ??? The solenoid does not click on reverse either even after putting the new one on.