At 10:56 AM 2/12/2002, David  Katsuki wrote:
>Where is there a coolant pressure sensor in the system?   I've never seen
>one and don't recall
>any reference to one in the manual.

There is none.

>Is it actually the level sensor in the pressure tank?  That doesn't seem
>to be connected to the computer in any way,
>and mine ('90) flashes randomly without impacting performance.

The level sensor is just a pair of s/s pins stuck down into the
coolant.  An open circuit between the pins should make the gauge LED
flash.  Depending on the particular control unit installed it may or may
not also peg the gauge.  I think they shifted sometime in '85 to the type
that doesn't noticeably affect the gauge reading.  As you say, it's not
hooked to the engine control electronics in any way.

david

--
David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"