NightKrawler
New member
Hello fellow jeepers. I was hoping I would get lucky and one of you guys knows a thing or two about the electrical systems in the JK. I had this dual battery system installed about a year ago and its had some type of draw on it since day one. I've had the shop that did the work go over it repeatedly and they're telling me that there's nothing wrong with the aftermarket parts used in this install and that there is a stock JK part that's causing the battery drain. I don't know if these systems can be wired up differently but the battery furthest away from the cab operates the accessories (winch, air compressor, lockers etc) and the battery closest to the cab operates the vehicle's stock accessories. For some reason only the accessory battery for the aftermarket parts was being drained at a rapid rate lasting only a week or two before it's completely dead and the battery for the vehicle has never had a problem. Recently the mechanic that has been working on the vehicle, in an effort to rectify the problem, rewired it somehow so both batteries are linked together and now they're both dying at roughly the same rate. I had taken it to the dealership, explained this scenario, and they had identified that there is no stock part that could cause a draw especially one of that magnitude. The dealership did confirm that the alternator is well within its operating range. Once again I know nothing about electrical issues and I'm hoping for feedback from someone more experienced than myself. I'd appreciate any related information, thank you