I was just in changing a slide out switch on the master electric panel on my chaparral. When I was removing the slide switch I accidentally pulled a few wires out from other switches.
It made me think that perhaps you might have one wire/lug that May have become disconnected from its switch behind the panel.
2016 RAM 3500 DRW 4x4 LB LoneStar Edition, w/Timbrens, Andersen Ultimate 2, Swift Hitch SH04 WiFi Backup/Rear View Camera
2018 Chaparral 360IBL w/Tireminder SMART TPMS, Furrion Wireless Observation System, Progressive EMS-HW50C
2006 RAM 3500 DRW LoneStar Edition
2011 Starcraft 392BHU w/Andersen No-Sway hitch