Need help with house battery. I thought the battery was bad, but carried it to Auto Zone, They checked it and said it just needed charging. I charged it for about 16 hours, put it back in and no power for lights,etc. Of course I get power when I crank the generator. What should I do next? There is a cutoff switch for the main and house battery which seems to work on the main battery. Could there be a problem with the cutoff switch on the house battery? What do I do next except take it to a rv shop? Many, many thanks. By the way it's a 1991 Pace arrow m/h.