I am sure this is not news to a lot of you but if you are towing with an f-150 check to see that you have the relay and fuse installed for charging your camper battery. I came across this info in an...
Even with the integrated brake controller on my GMC I had to install a fuse and connect the charge wire to the post on the fuse box under the hood. Gm did not supply either the fuse or the nut for the post.