Steve, (Jacksonville, NC)
In addition to the individual components, the wiring itself should be hi-pot tested to reveal any damage to the insulation on any circuit. All of these tests should be performed by a competent, well equipped RV shop employing certified RV technicians.
It’s unfortunate, but you’d be surprised how often this actually happens. The first rule before plugging into any new power pedestal or receptacle is to measure the voltage and check for the proper polarity. I say this, not to rub salt into your wound, but as a reminder to the other readers. If the smoke was noticed quickly and the coach disconnected soon enough, there is a good chance the damage will be minimal, however, the aforementioned tests should still be performed just to be sure.