Not sure what I know about the Ford methods applies to 2012's, but here goes: The body tail / turn runs thru the Body Control Module (BCM). This module switches the various lights on and off and monitors the current load. If it senses excessive current, it shuts that circuit off. Now here's the lousy part- apparently it only does this a fixed number of times before it sets a permanent non resettable code and kills that circuit- and you have to replace the BCM to make everything work. Stupid way of doing things to me, but I am not the guy selling BCM modules.
There are fuses for the BCM, so if you're lucky, one of them blew, but since the FT & mirror lights work I am not 100% sure about the fuses.
Due to the mixture of one thing working and others not, I would verify that the 7 way is actually connected to the trailer lighting circuit, as that circuit is old school with fuses & relays.
Ultimately I suspect the two trailers you pulled had some electrical issues that the BCM didn't like, hence the non op RT Turn.
