The problem can be the sensor in the tank, the wiring/grounds/connections,
the gauge, or the relay in the dash. The sensor is easiest to check. Take a
paperclip and jump the two connections in the connector at the top of the
coolant tank. Turn the van off and on again and see if it goes out. If so,
it's the sensor. You must shut off and restart the ignition each time to
test the system. For further troubleshooting, check these links:

http://www.thesamba.com/vw/forum/viewtopic.php?t=353678&postdays=0&postorder=asc&start=42

http://www.vanagonauts.com/Warning-Light-Fix241.htm

Ed
--------------------------------------------------
From: "Damon Hill" <wellyoufoundme@GMAIL.COM>
Sent: Tuesday, September 21, 2010 10:49 AM
To: <vanagon@GERRY.VANAGON.COM>
Subject:      85' GL Pesky Coolant Light has a life of it's own

> Damon here, first time poster.
> My 85' GL low coolant light randomly comes on. Sometimes it will blink
> until I'm up to temp, sometimes it just blinks at random. I have checked
> for a loose connection and diligently check the coolant at least a couple
> times a day. Fan comes on appropriately and hoses don't appear to be
> resticted. Is this a notorious gauge thing? Or is this something I should
> dig into much further.
> I am probably supposed to post more vehicle bio info...promise to do that
> next post.
> Thanks in advance for your thoughts, D
> Sent on the Sprint� Now Network from my BlackBerry�