2015 Coachman Lepracan coach battery?

Well, more drama with trying to find the reason i’m getting no 12 volts to my coach. I did remember the generator having a breaker of some sort, so pushed or pull the unit, and it shut down the generator. So switched it back into its orginial position. Making matters even worse now, now the generator shuts down when i turn the cab motor off:(. I can win for loosing :). Before doing the generator breaker or wharever that unit does ( its a breaker) cause i had one in another Class C that did the same thing, but it brought back power to my old coach. Back to the battery cut of switch, took it out of its mounted place and there is zero voltage on either post positive or negative. Checked the negative to a common ground and it showed grounded.
Few more days of messing with this thing and its going to a shop, unbelievably aggravating.
Jamie