I had this same issue and started to test all of the fuses. I honestly forgot which fuse (or maybe relay, I forgot) it was, but there was another one that seemed completely unrelated that was blown and it fixed the issue. Buy a cheap tester and test them all under the hood - only takes a few minutes.I don't seem to have any power on any of the pins on my 7 way RV plug on the truck. It is a 2015 p4x auto.
There is an interior fuse box, and two under the hood. On the fuse box under the hood, and furthest back, there is a 30A fuse marked TOW, but it looks to be fine. Are there any other fuses I should be checking?