It sounds as if the auxiliary battery switch and/or relay is not connecting. If you don't hear a clunk when you turn the auxiliary battery switch on, the relay may be stuck open. You have my pity, maybe an RV repair guy can find and test the relay and switch. Check You Tube for troubleshooting how to.
PS: I checked You Tube and did not find specific "how to" on testing the auxiliary battery switch and relay that connects house battery to converter charger in on position and disconnects house battery for storage mode. In our 2004 Tioga, the relay I'm referring to is mounted in the battery compartment and the disconnect switch is in the switch and monitor panel above the entry steps. I seem to recall a latching reset button near the relay, press it, might be a circuit breaker and restore power.
