The best way to keep an aux. battery charged is by
using a battery isolator.  The alternatorc then can be
wired to charge both batteries, but the isolator
prevents the aux. accessories from drawing on the main
battery.  Check out www.surepower.com.  The isolator I
have in my 90 GL is made by them.  You need to make
one simple mod. to your alternator (basically just
cutting one wire), and the isolator can be mounted
inside the engine compartment.  My aux. battery sits
under the rear seat and powers the fridge and an
accessory outlet.

Graham
90 GL auto. country homes camper conversion

--- Chuck Mathis <CMathis227@AOL.COM> wrote:
> Javier,
>
> Your battery arrangement sounds different from my
> 'factory' set-up.  In my '85 the auxiliary battery
> powers the usual auxiliary stuff and the other runs
> the starter and other 'car' stuff.  The alterator
> charges both batteries.  What you may want to do is
> get one of the Hella auxiliary battery kits or look
> in Bentley for the proper wiring to get your
> auxiliary hooked to the alternator.
>
> Chuck
> '85 Wolfsburg Westy
>
> In a message dated Tue, 16 Jan 2001  8:27:56 AM
> Eastern Standard Time, Javier Zavala
> <zavlomja@EC-RED.COM> writes:
>
> << My batteries are not hooked together, one works
> with the engine and
> alternator, the other one works for the sink,
> lights, fridge, etc, and it
> charges from an external source (plug) thru a
> charger that fits under the
> rear seat.
>
> Javier Zavala
> 84 1,9L German  Westy
> 01 Prospector Hovercraft
>  >>

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