I had a new radio put in my rig the day before I left on my current trip. When I got to the first night's site in the next state, I noticed that my rear radio was not powered. When I plugged into 110v, the radio came alive. My first thought was that the radio installer had screwed up the wiring.
For a week, I would have to reset the back radio settings, every time I plugged into 110V. Then I noticed that my fridge was not switching from 110v to gas when I was not plugged into 110v. I made an appointment at another car stereo shop in a city I know well. He spent one and a half hours ringing out every 12v system and fuse. No issues. Then I remembered that fuse next to the house batteries. As I opened the stair cover, the guy told me that he had checked it.
AND I LOOKED LEFT to see the Use/Store switch. I never use this since my rig stays plugged in at home. Click - ARGH!
Added: HWH Kick-Down Leveler; RoadMaster Anti-sway bars; Tornado Rotary Tank Rinser; Accede Backup Sensor Kit; cylinder locks (w/one combo lock); custom sink cover; Kenwood DDX 5706S front radio; Pioneer MVH-X5560BT rear radio; Oxygenics Shower head; ScanGuage II; Blue Ox Tow Bar w/RVi Brake 2; Winegard Rayzar Automatic TV antenna; Trimark Steel door lock; Dometic 310 toilet; whatever is next.