You may find it easier to simply move ALL interior electrical stuff to the
aux battery, including the radio, cigar lighter, etc.  Check the archives
for instructions on this.  It involves running one wire from the aux battery
to the fuse block.  Where it attaches to the fuse block depends on what year
Vanagon you are driving.

On 6/27/06, Gilles Turmel <gilles.turmel@sympatico.ca> wrote:
>
> Hi,
> I want to connect my overhead Westy light to the fuse boxe powered by my
> auxilliary battery.  Where is the best place to intercepted the power
> wire feeding that light?
> Best regards.
> Gilles Turmel
>