Hi movinaling,
We just completed a 10,000+ journey and didn't have any problems until we got back to Ohio. I plug into the 50 Amp outlet and everything worked fine. We then went away and when we got back we noticed No Clock on Microwave. Further inspection we found we had TV and outlets in the back of our Trailer and the one under the Cupboard near the stove top.
After scratching my head for a while my meter and checked the main breaker only to find the red 120V was missing. I pulled the 50 Amp plug out just far enough to get to the pins and found I had the voltage there but not at the other end meaning an open somewhere.
I have the power reel on our Bighorn so I pulled the cord all the way out and removed the inspection plate and found no Voltage there either.
So I bought a new 50 Plug and cut the old one off and checked the wires and they all checked good with resistance.
After Replacing the 50 Amp plug everything worked great.
Here is a picture of my old original plug. The red wire just pulled out of the crimp. I didn't see where the shield had moved so the wire must have pulled back from inside. Bad Crimp I would guess.
Jim