Hello AlI
I don't know about you but there were 6 fuses that PC installed (my rig) in the wiring that I was curious about. PC never labeled them or even gave an idea what they were for. I guess you might have been able to call the factory and they would give you the answer. I would however imagine they vary from year to year. Here are a couple sketches I put together that may help you if something isn't working. Also I will list the fuses, my PC is a 2017 2552..
Under the hood, 5 Amp fuse for power to the white switch on the dash
Under the kick panel drivers side, 5 Amp fuse for the mirrors
Under the dash drivers side, 15 Amp fuse for HWH Levelers (control power tapped from Ford's fuse panel under dash)
5 Amp fuse for Radio, Camera Multiplexer Switch there are 3 other wires I am still chasing. There were 8 wires tied together with a wire nut, some went to the pioneer navigation system which I removed. This is fed from a Ford factory plug under the dash wire color Y/R.
5 Amp fuse to Step Switch, This is fed from the same Ford factory plug under the dash, wire color G/R
25 Amp fuse to Step Motor, This is also fed from the same Ford factory plug under the dash and is tied into the G/R wire
Not sure if this helps or confuses you more, wish PC would just publish the wiring diagrams like other coach builders...
Very Respectfully
Lance