KD4UPL wrote:
GM trucks have nothing to disconnect the camper batteries from the truck batteries. They are constantly hooked together as long as the 7 pin plug from the camper is plugged into the trailer. The solution is to unplug the cord from the truck when dry camping. Or, you can install a switch in the charge line and turn that off. If you want to automate the process I would install an automatic charge relay from Blue Sea systems or another reputable brand.
May not be possible to disconnect the cord with the truck camper loaded. Another solution is to pull the stud #1 fuse in the under hood fuse box.
However in this case, clearly the converter isn’t working and the truck and camper batteries were powering the fridge, I’m assuming in 12V mode since they died so quickly.
