The wiring shown in the Bentley for an aux battery does not show the
battery doing anything at all. That is probably the reason for your
question. It seems many vans actually shipped to the US with an aux
battery had nothing connected up to use that battery, silly as that
sounds. Others had a single cig socket attached to the battery as the
only purpose.

Mark

Loren Busch wrote:
>   RE: Aux Battery
> I made my original question way to long and complicated, let me re state it:
> If I add an aux battery, with a relay that only connects the two batteries
> when charging, and leave all else the same, what have I gained?  The aux
> battery is connected to nothing and   the 'fridge is disconnected from both
> batteries with the ignition off, same as before.  So what is gained unless
> other wiring changes are made to utilize the aux battery?  What am I missing
> or misunderstanding about the stock aux battery wiring using the diagrams in
> Bentley?
>