Other things to try: The multi-prong connector that connects the wire
harness to the back of the printed circuit sheet for the instrument
cluster - check for corrosion on the terminals. I've had bad connections
there cause problems on more than one vehicle. Check also the engine
compartment oil switch harness connections- all of them. The second pressure
switch is in an awfully inaccessible spot to the right/below the water
pump - it can't be changed without either major disassembly or cutting the
sheet metal below the main coolant reservoir. The last piece of the puzzle
is the dynamic oil pressure control unit that lives inside the speedometer
housing. The terminals here are usually the culprits, rather than the CU
itself. Moral: Clean all terminal connections from back to front, before
changing parts. Location info is all there in the Bentley.

Coby

Valley Wagonworks
"Intimately acquainted with VW Vans since 1959"

Volkswagen Bus, Vanagon, Westfalia and Eurovan
Repair and Service Specialists

1535 Sir Francis Drake Blvd., San Anselmo, CA 94933
Voice:(415) 457-5628
Fax: (415) 457-0967
http://wagonworks.com
mailto:contact@wagonworks.com

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
Of Jay L Snyder
Sent: Friday, March 03, 2000 8:40 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Oil Pressure Gremlins

Try moving the wire around that comes from the high (back) sender.  When my
'86  came home from the dealer after a warranty repair of the head/jacket
seals, my oil buzzer started going off randomly.  It seems they routed the
wire (yellow?) too close to the spark plug wires.  After I routed them away
from the plugs, the trouble stopped.  The good thing about it was it forced
me to install an oil pressure guage up front.  I never had a problem since.
                                                        Jay