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