UPDATE

I figured out what was wrong with my refer/freezer. The thermostat was set to "off". D'Oh!
It's chilling like a villain on both 120v and propane now. Not a 3-way like I thought. It is an option and I could get the stuff to convert it to 12v also but I don't think its necessary as the propane pilot is sufficiently shielded for driving while on propane.

[More:]

The propane burners and oven work great as well as the water heater. Still need to test the furnace.

One funny thing: I put the hose into the fresh water filler and turned on the water to fill my tank. I soon found that the hose fitting where the filler tube attaches to the fresh water tank had broken off. So I was pumping clean fresh water into my bedroom! Hoooray!

Anyway, looks like an easy fix as the fitting didn't break, the adhesive just gave out after 26 years of service.

I may be up for a trip to Camping world if anyone is game on Saturday afternoon. I need a few 12v interior lights and random bits.

Mike