I had UHaul upgrade the 4 pin flat to a 7 pin round. Using a Curt wireless brake controller, I'm pulling a teardrop trailer with electric brakes. Been on a few short trips and everything works fine.I just got a hitch installed at uhaul. They used a Curt adapter (59236). The output is a 4-pin flat.
I'm finding the campers i want to pull require a 7-pin to drive the brakes.
The Ford wiring seems to be 4-pin which doesn't help.