I have a 2002 club car with a d&d motor, and the alltrax 500 amp controller. I did a complete overhaul down to the frame. Everything is wired correctly. I even put new batteries in this thing. I bought this thing used so I don't know if there was a problem when I got it. I go to charge it and the charger turns on for about 2 minutes, and then shuts off. I am not sure where to go from here. Please help!!