> Most of the aux battery charging circuits I've seen for the Vanagon use
the
> signal from the alternator to activate the relay. Therefore, no current
should
> flow from the starting battery to the aux battery with just the ignition
turned
> on, only when the alt is producing a voltage.
> Larry

Larry,
I'm not 100% sure of this, but I think when you turn the key on far enought
for the dash lights and the radio to come on but do not turn it far enough
to start the engine the relay is switched to connect the two batteries. I
think I remember the + post of the starter battery is wired to the + post of
the starter is wired to the + post of the alternator. It's easy enough to
check... just open the auxiliary batter box and put your ear down there
while turning the key part way on.... I think you will hear the relay click.
Bill
>