If the cart has the coiled resistors behind the batteries, check all of the connections here also. Make sure that everything is corrosion free. Pay particular attention to the last resistor coil (the one that goes from the last contactor on the V-glide to the coil). Also check this cable.
These coils are not interchangeable. They are wound at different lengths. And, they all get hot! So, be careful.
P.S Disconnect the batteries prior to working on anything