Stanley Pitman wrote:

> If you
> make the auxiliary charging current too high, there is strong risk of
> damage to battery or alternator, as well as siphoning off high currents
> from the starting battery whenever the ignition is turned on; don't tarry
> too long before starting!

Stanley,
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