Put that voltmeter on the ALT posts, see what your output is ! 
I bet its a charging issue.
 Sean G

      From: PB <pbrattan@GMAIL.COM>
 To: vanagon@GERRY.VANAGON.COM 
 Sent: Thursday, January 26, 2017 3:34 PM
 Subject: New battery drained...waaaaaaaaa :-(
   
Just got a brand new 36 month free replacement battery on Jan. 2. Due to
recent bad weather, I drove it fairly short distances 2 days in a row,
didn't drive it for about 2 weeks, and now the battery's dead again.  I
can't see that any lights were left on, and the stereo kill switch is
turned off. I did notice, however that the second time I drove it,  it was
a little harder to start so I checked the battery voltage.  I don't
remember exactly what it showed, but it was less than 12 volts, and
although the van started, it didn't start as easily as it should. At that
time, I noticed that I had an unused plug connected to the aux battery, and
there was a blue light on around the plug.  I promptly disconnected it when
I noticed it. I also made sure that the dash cig lighter plug was not
pushed in.

When I first got my van, I didn't know there was a stereo kill switch, so
the stereo was drawing current, and it killed the battery.  Got a new
battery then, and that battery lasted nearly 10 years without any issues at
all.

What could be drawing current this time?  Or is it just not charging while
I drive?
Patti
90 Westy Automatic
Los Angeles

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