I think I understand enough now to do some basic testing of the RV battery system anyway, so I can better understand what is happening. This whole thing has pretty much been a black box to me until today.
If I disconnect the chassis battery and hook up my volt meter to the free-hanging chassis battery terminals, and then I turn on the ignition and set the rocker switch to DUAL, no voltage should be seen at the chassis battery terminals since the chassis battery is disconnected, and thus it cannot power the Charging Solenoid.
If I then hold the rocker switch to MOM, I should see house battery voltage at the chassis battery terminals, since the house battery powers the Charging Solenoid in the MOM position.
If I reconnect the chassis battery and disconnect the house battery terminals, and I check for voltage on the house battery terminals, with the ignition OFF and the rocker set to DUAL I should get no voltage at the house battery terminals. With the ignition ON I should see chassis battery voltage at the house battery terminals.
Does this sound right?
Steve
