I agree with other replies, your problem is related to your house batteries. Your Bounder has a box called a BCC (Battery Control Center). There are two DC circuit breakers in there that may have tripped, and would cause these symptoms. Most likely, though, you have a bad connection at the batteries (either positive or negative battery cable) or dead batteries for some other reason.
You didn't say whether or not you had 12v operation from shore power? How about, with the generator? If not, then your converter may be bad.
The symptoms you listed are consistent with what one would expect when running, and stopping, the engine. It does indicate that you have all battery switches in the correct position, since the power from the alternator reaches the coach interior lights.