Check fuses. My Mh is on Freightliner chassis, but- on a trip last year, I lost step retract, dash fans, rear camera and windshield wipers. A fuse was blown in the ignition circuit.
Hooligan, Pensacola, Fl -U.S. Coast Guard 1956-1985
2016 Thor Siesta Sprinter 24ST diesel -1972 Moto Guzzi
2008 Suzuki Grand Vitara TOAD