Thanks for all the input, Folks....
I'm leaning toward two things:
1. A fuse. I have to dig back into the basement to find the others to check them (I do have a fuse checker that lights up) and it would make sense that using the heater in the outside outlet may have blown something as it stopped working after that.
2. Wiring. I have a mouse. Started as soon as I got here. Have traps out. Haven't heard him for a few nights now. Maybe he electrocuted himself chewing on my wiring.
I have the schematic out and am trying to sort it out.
I have an Alpenlite 5th wheel. An inverter/converter combo.
