I think the idea is that the relay is activated by the alternator charging,
not just the ignition key being turned.  That prevents the run-down battery
from robbing power from the charged battery when you first turn the key but
aren't charging yet.

But I am not 100% sure this is how it was designed but I think so.  I just
put a second battery in and am puzzling over the same thing.  I may just put
in a manual switch.  When you run wires, you would run them under the van
which is no big deal.

Anyone else?

Dave in Denver

>From: RoadwarriorSF <sfwesty@GMAIL.COM>
>Reply-To: RoadwarriorSF <sfwesty@GMAIL.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: 2nd Battery setup questions
>Date: Mon, 9 Jan 2006 17:51:22 -0800
>
>This is for a 91' Multivan
>
>Has anyone setup their 2nd battery using  a wirewerks kit? (this one)
>http://wirewerksperformance.com/index.php?main_page=product_info&cPath=31&products_id=10&sessid=a9494efc0ab583f5e3d8f390e3edff8c
>
>Maybe this is something the list can help with. This kit's relay requires a
>connection to the "no charge light" wire coming off of the alertnator. It's
>used to "power" the kit according the wirewerks folks. I wondering if I
>really have to run the wire back to the alertnator? If so, is there an easy
>way to get around the bench and through the engine cover? Shouldn't the
>wire
>terminate at the front of the vehicle? Wouldn't that be easier?
>
>Here's the schematic
>http://wirewerksperformance.com/images/Schematics/aux%20battery%20charge%20kit.doc
>
>Thanks,
>Yoel and Tina