Why Would Battery of Tow Vehicle Not Be Above 12 Volts When Charged with Charge Kit

Published 10/14/2021

Question:

2017 jeep cherokee battery not charging from Motor Home. If I disconnect charge line to car battery I read 13.8v on both sides of the circuit breaker with the MH running. With line connected to + side of jeep battery I only read battery voltage. After towing for a 100 miles or so battery is near 12.0v. My jeep does have the upgrade that keeps the power steering running while towing.

asked by: David A

Expert Reply:

The gauge of the wire used from your motorhome to your tow vehicle and the length of it is probably why you aren't getting a really significant charge. It does sound like your tow vehicle is getting a charge on it's battery but it's not significant enough of a charge to keep it topped off since the wire is a lighter gauge. You might need to drop down to an 8 gauge wire which is not one we carry.

expert reply by: Jameson C