hello all i just pick up a ez go golf cart from a friend the cart was running last summer i new this becouse my kids would play on it. i just bought it from him a few days ago and he had told me the batteries where bad so i bought new ones for it today. after installing the new batteries and giving them a good charge the cart still want do anything the back up buzzer want even sound. any thought are ideas on what it may be are what i can check to see what the problum may be. thanks for your time