I bought a 2007 Club Car Precedent and was told it needed a controller and or motor, also had no charger. I bought new 4 12 volt Trojan batteries a box bypass and new battery charger, also bought a new solenoid and controller, installed all. I didn’t charge the new batteries but checked voltage, was 49 volts when I turned key on I got nothing, I remembered run/tow was on tow, I hit the tow to run and I got a spark and high pitched hum. I turned key off but the humm was still there. I took off the negative wire and hum stopped. I checked batteries still read 49 volts. Any idea where to start?