This sounds exactly like what I went through, an absolute nightmare of a time solving a simple issue with the help of some great people. Seriously I can almost promise you that it is a cracked fuse in the battery junction box in front of the battery. If you read through this thread a little, you will find pictures and diagrams that should help. For me it was the BCM 50A fuse, (Mega 9 in the diagram) I replaced the fuse, cleared the code, and she has been running flawlessly since. That satisfying feeling of finally fixing an issue that feels impossible to find is unlike anything else.Same exact issue I have had over the last couple of months, 2015 Ford Focus (SE) hatch. I have had a hell of a time finding anyone with the same issue until now.
Now I am having an issue getting any power at all until I give the positive battery cable a good tug in just the just right direction. I had the car lose all power while driving and when I finally got it started again, I did not have flashers, hill assist, or turn signals, and my windshield wipers were stuck on.
Does this all sound like the BCM 50A fuse? Battery is only 2 months old, connections are good, cables are good. This has been more frustrating than any other car/motorcycle issue I've had in the past.