stangman67 10+ year member
CarAudio.com Veteran
Topic for discussion,
When adding a second (or third or fourth etc) battery in the rear of the car is it better to ground the batteries to the frame or do a run of negative from the front batt to the rear.
I have read a few posts lately on various forums stating that it is necessary to ground the battery directly to the starting batt via a run of wire. My opinion is that grounding the battery in the rear to the frame is fine since everything is essentially grounded to the frame, ie making a closed loop. The resistance difference between a run of wire and the frame of the car is negligible.
Other people's opinions?
When adding a second (or third or fourth etc) battery in the rear of the car is it better to ground the batteries to the frame or do a run of negative from the front batt to the rear.
I have read a few posts lately on various forums stating that it is necessary to ground the battery directly to the starting batt via a run of wire. My opinion is that grounding the battery in the rear to the frame is fine since everything is essentially grounded to the frame, ie making a closed loop. The resistance difference between a run of wire and the frame of the car is negligible.
Other people's opinions?