[SEHunter]

If your primary contactor is pulling in, you'll hear it. Its the click you hear when you press the accelerator pedal with the f/r switch in either fwd or rev. Do you know what make/model motor controller you have?

It could be the micro switch located on the F/R switch assembly under the seat for the forward direction but if you hear the click from the primary contactor when the cart wont go then it's possibly your controller. If it's always a failure in the same direction and especially if you hear the contactor, it's not a bad primary contactor or micro switch. With a loss of only one travel direction while hearing the contactor click, your most probable failure is the controller. If you have a bad micro switch, you won't hear the primary contactor click because there's not a signal that requests fwd travel causing the contactor to close ("click"). See if you can hear the contactor and go from there.