I have a 2004 American Tradition. Recently, I have noticed that the starting battery is draining when attached to shore power. I am having to turn off the starting battery disconnect whenever I am gong to be staying at one place for more than a day or two. I have checked the voltages which confirm that the battery is not getting any charging voltage. Is there a "fuse" or other device that I should check to see why the battery "big boy" disconnect isn't closing in to charge both batteries. I can use the switch on the dash to "jump" both batteries together, so I know the "big boy" is working. Thanks for any thoughts.