He might have recycled the power at the campground pole, but is there power? Just flipping a switch might not be enough. Can he plug something different into the pole and see if it actually HAS power?
Or, can he run the trailer cord to a neighbor campsite and plug in for a few a few minutes to see if a different pole has power. If the camper gets power from another pole, then the campground pole is the problem, not the camper.
I would have him make VERY sure the pole has power before doing anything else.
Something similar happened to us a couple years ago. It was the hottest day of the year when we pulled into the campground and our pole did not work. I tried everything. I then finally ran enough line to the neighbor site plug and we had power.... enough to cool the camper down, until the next camper on that spot came in (which was about an hour later... but we did get the camper cooled down). Meanwhile, it took an act of congress to convenience the campground management there was a problem with the pole. Turn out to be a bad breaker at the pole.
Have your friend make absolutely sure there is power at the pole before dissecting his camper.
