Went to golf today and cart was not fully charged. Charger was off and the circuit breaker on charger was tripped. So I unplugged charger from cart and reset breaker, plugged cord into the cart, the charger clicked but charger did not start and breaker tripped again. So to eliminate that the cart was not a issue I plugged in my friends charger into the cart and it worked so I know it is the charger. Where do I start?