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More specific information on your motorhome and chassis would help troubleshooting. (Year, model, chassis, engine)
I had a similar failure, lost the fans, rear camera, no windshield wipers and step would not retract when door closed. 2000 Freightliner XCS chassis. It was a fuse in the fuse blocks below the driver door. Fuse marked Ign-1 and it feeds a "Body Builder interface" harness. 2nd of 4 fuses in line and marked #24 on fuse block cover
( My fuse failed because a crimp connector in that interface line had overheated and was discolored/melted.)
Hope this helps..
Hooligan, Pensacola, Fl -U.S. Coast Guard 1956-1985
2016 Thor Siesta Sprinter 24ST diesel
Our Pug "Lily" & "George" the Newfoundland