[B_and_D]

I'd also check the main 12V fuse right by the battery. We had something almost exactly like this happen to us last year. I don't know how it blew, but it did. This had never happenend before, nor since. We were staying at an older RV park with hookups and I suspect that there may have been something wrong with their electrical system that caused this. I felt kind of "duh" for not checking the fuse, but it had never happened before.