The use/store switch by the front door would not engage. I was told that this was because the house batteries were depleted. I do not know what voltage is necessary for that switch to work.
Since my previous post, I did drive the MH home and the main engine did not charge the house batteries. Fortunately, the alternator did provide 12v to necessary chassis item such as lights, turn signals, etc. I could not, however get the radio and its camera display to turn on ( bummer) so I had to back up the old fashioned way and use my mirrors.
The good news is that once I got it parked and could plug into shore power, I was able to engage the disconnect switch and my batteries are happily charging.
2008 Berkshire 390TS