Bill.Satellite wrote:
I wonder if the equipment is reading that neutral and ground are reversed?
There's no electrical way to detect such a fault, since the only difference between neutral and ground lies in what purpose they serve and whether the physical wire has a jacket around it. Both are connected together (bonded) at the main service entrance, so both are at the same or very nearly the same potential.
(Just for clarity, note that the RV's electric panel is not the "main service entrance" referred to above; ground and neutral should be kept strictly separated in the RV electric panel.)