Had the same problem with my 35M. I had a bad connector on the male side of my cord. It worked fine on most 50amp but if I used an adapter for 20 or 30amp plugs, it gave me trouble. After I replaced that I found the second culprit. Thor likes to gang up all the ground wires into connectors and then screw them into a ground block. I found two of the gang connectors were not pintched correctly and I was getting bad grounds which caused havac in so many different ways. So put a meter on your cord and make sure you have no connectivity between the 4 poles in the cord. Then tug on all the white wires where all your electrical connections are. Make sure everything is tight and secure. Took me a whole season of wierd power disconnects and drained house batteries until I finally found it. Absolutely no issues this year now that the grounds are all solid.
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