[PTCLarry]

Thank you, Tag50, for your reply. I had a chance to open the potentiometer tonight. Surprisingly, all looks good inside. The resistors were all tight (no loose connections) and did not have any visual descrepancies (were not burned or discolored in any way). The contacts all looked clean and shiny (indicating the wiper is making good contact on them all). For a nearly 20 year old cart, I was very surprised. I put it all back together since the cart is still running okay.