Were you plugged in to shore power or running the genny at the time?
If so - the BIRD/Trombetta could have tied the house and (non-existent) chassis battery circuits together as it would to allow charging... Side effect the house battery would be in the circuit when you tried to start the MH.
If you weren't plugged in to shore power or running the genny - then the house and chassis batteries should have been isolated and you should not have been able to start the MH.
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Greg
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)
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