I thought instead of starting a new thread, since I had so similar a problem, I would just add it on here.
I came back from the Canyonville, Oregon rally 2 weekends ago on a Sunday, and enroute through the 100+ degree heat of the Northern California Sacramento Valley, I noticed at one of my rest stops the refrigerator supply "off door side" 12 volt DC supply fuse had blown. This really puzzled me. Later that evening, I disconnected the 12 volt supply wires to the refrig. and thought I had the problem isolated to the refrigerator circuit board. This also puzzled me, as the board has fuses on it that didn't blow. I got a new Dinosaur Electronics brand improved board, installed it, but still was blowing the ODS supply fuse. Finally I seperated the 2 wires going into the fridge, knowing one was 12 volt supply, and the other extended that circuit to other devices. I connected the 12 volt supply,then the refrig worked, and the fuses didn't blow.
I established that the 2 12 volt lamps over/near the stove did not now work, so those must have been supplied by the disconnected power wire. I disassembled those 2 fixtures, and found a probable short of the power switch to a metal shield on one. I trimmed the metal shield and insulated the switch and shield with tape.
I reassembled the wiring, and everything works O.K. now.