Will your Club Car DS Electric now run in forward but not reverse? Here is the way to test and fix your problem with your golf cart.
Take the F&R switch out of the black housing under your seat. Swap the brown wire with the blue wire. If the golf cart still has this problem, the controller has gone bad. If the not moving issue changes direction (Will run in reverse, but not forward) the switch has gone bad and need to be replaced.
It is usually that simple. The best case scenario is that you only need to replace the Forward-Reverse F&R switch. You can find a replacement F&R switch for 48 volt carts here. For 36 volt carts here.
Working on your golf cart can be frustrating sometimes, but I hope this helps you solve your issue.