kleake
Member
Anyone ever leave your trailer plugged into the truck while it's not running and have it drain your trailer battery? Once the truck starts it's charging fine, but shut it off and there is about a 1amp drain on that line. Pulled the relay and unplugged the trailer, test light on positive, probe on the relay terminal to the trailer plug and it lights my test light dim. I've heard of water being in the trailer plug and I think I sealed that up a few years ago. Not sure if it's in the plug or somewhere in the wiring. I only have the factory plug at the bumper, nothing added in the bed or anywhere else.