I had a similar issue on mine but it would blow out a fuse in the interior fuse panel that would shut the jeep down. Found a wire that has been rubbed though on the factory trailer wiring harness. The way it's routed the shackle on the driver's side would rub on it at certain angles and it rubbed a hole right through the insulation on the wire. I removed Jeep's routing clamps and re-routed it and then insulated the wire again and re-wrapped everything back up.