FWIW, I have a schematic for the dash air on my Camelot. Can't say how close it would be to the one in your coach.
It shows the full circuit for the fan and every other electrical component of the system. It's too big to upload as a photo (it's in pdf format, and when I convert it I can't get it small enough for the jpg limit), but if you want a copy, PM me your e-mail and I'll send it along.
Dan & Linda
FMCA 399045 NKK 22240
2020 Dutch Star 4081 - Spartan K2 - On Order
2017 Dutch Star 4018 - Sold - Towing Jeep Grand Cherokee Trailhawk