I have anew to me camper. Just today an electrical gremlin presented itself where the camper will not power up unless it's plugged into AC shore power. Th battery is charged, no fuses are blown, the circuit breakers don't trip, converter is working, and the main kill switch is also working. I haven't had time to trace most of the wires as this happened later in the day. But I'm hoping the problem lies somewhere downstream of the main on/off switch as it does appear to have power from the battery and allow power to go through when it is pulled out. That's where my troubleshooting ended tonight. I'm hoping there's another fuse in there somewhere, but any advice is greatly appreciated.