UPDATE; RESOLVED!!
Had time to look at the problem today in the light of day.
I have to use an extension cord from my house to the RV cord. A wire had come loose inside the Camco replacement plug I had put on a year or so ago. I thought I had measured 120 on both legs the other n9ght when I posted but in the light of day, I pulled the cover off the transfer switch which is under the bed, and ony had one leg. Outside, I had measured both legs at the breaker box and unplugged the cord for the extension cord a little so I could read voltage on the blades of the cord, which was there. But it wasn't making it inside.
Redid the plug and everything is good again.
Thanks for the help and the manual.
Now to find a better replacement plug. The Camco doesn't have enough metal to suit me.
