My problem is now fixed!
I pulled the breaker panel looking for dead wires on the output of each breaker. One wire was not working.
The 15A side of a dual breaker was fried. I took a matching Cutler-Hammer breaker from my house panel and - no surprise - everything is now working fine.
I never intended to learn some much about my coach - but I guess that was inevitable
Now that I think of it, I saw my wife's 2000W hair dryer in the bathroom. I should have put 2-and-2 together