Any Jeep technicians out there?
Try disconnecting the battery sensor on the negative terminal for 5 minutes or so. And you said Cherokee (KL chassis) never had a stop/start battery and never had a 3.6 a Grand (WK) may have a stop/start battery. If it's the OEM battery replace it anyway but try the battery sensor disconnect first!
Try disconnecting the battery sensor on the negative terminal for 5 minutes or so. And you said Cherokee (KL chassis) never had a stop/start battery and never had a 3.6 a Grand (WK) may have a stop/start battery. If it's the OEM battery replace it anyway but try the battery sensor disconnect first!