The control unit is under the dash, mounted on the left A pillar.  You will
have to remove the fuse box to reach it.

Dennis

-----Original Message-----
From: Jim Maginel <c455ssl@SEMOVM.SEMO.EDU>
To: Vanagon@VANAGON.COM <Vanagon@VANAGON.COM>
Date: Friday, July 31, 1998 4:33 PM
Subject: waterboxer coolant light

>The warning LED on my temp gauge(located over the clock) has never blinked
>when turning on the ignition like it should.  I recently installed a new
>"coolant low level switch" (located on the expansion tank), thinking that
>might be the problem. No such luck.  The wiring diagram for the 85 shows a
>"coolant low level warning control unit" between the expansion tank switch
>and the dash--anyone know where this might be located?  Maybe stuck up
under
>the dash?
>In the meantime, I will look for a replacement coolant temp gauge from the
>junkyard as the LED itself is integrated into the gauge.  Is the same gauge
>used in other VW's?
>TIA
>Jim Maginel
>85 MidWesty
>Cape Girardeau, MO