I had same problem in my '84 a while back.  Got a new voltage regulator from
a local FLAPS and fixed problem.

John Lauterbach
Macon, GA
'84 7-passenger

----- Original Message -----
From: "David Prager" <DavidP@VECTRAD.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, December 13, 2001 1:30 PM
Subject: Alternator advice on 85 Wasserbox

> Hey all,
>
> I've only had my water cooled 85 for a few months. During this time I
> started having a problem with battery charging. As the battery problems
> started I noticed increasing simultaneous flashing of the battery and O2
> lights. I've read accounts where the flashing lights usually indicate an
> internal grounding problem in alternator. So.....change the alternator
> right? Not exactly.
>
> I pulled the alternator to determine which type I had. The unit I pulled
was
> a Bosch AL27X. This unit had the W terminal on the back, but nothing was
> plugged into it. My situation on repair day was that I couldn't get an new
> or rebuilt unit, so I accepted an allegedly tested unit from a used parts
> dealer. I didn't even have to change the pulley.
>
> To make a long story short, when I start the van, both lights are on full
> time. Is this as simple as I got a bum alternator? I plan on pulling it
> apart again this weekend, but I'm reluctant to invest on a new or rebuilt
> without knowing the status of mine. I'll take it to the local parts place
> and have it bench tested, but is there anything else that can be done
prior
> to ordering up a new alternator.
>
> I'll welcome any and all advice.
>
>                                         David
>
> David Prager
> Vectrad Networks Corp.
> 425-354-1315
>