My thoughts are leaning toward a bad controller.
Do you have any mods done to the cart like a lift, larger tires, rear seat etc?
FYI 36.6v is only about 50% charged. It's not really part of the diagnoses, just an observation.
OK. I checked everything by the above checklist and all checked as specified. I have charged the cart and the voltage is now 39 volts. Does this mean bad controller or possible bad motor? Also, is there a way to jump the motor to be able to rule it out?