1998 Club Car DS 48 volt. Wont move reverse or forward. No buzzer sound. No click from solenoid volt meter still in the green. Batteries are 3 yrs old. Been sitting 10 months Charging with a Summit2 charger. 6.4, 7.4, all others 7.7 volts. Charger tries to charge it reaches 45.3 volts an throws a fault. Why?