Interestingly, this Friday's S.F. Chronicle Click and
Clack column had someone with the same symptoms, in an
86 Audi 4000 though.  They suggested the possibility
of a bad pressure sensor, or a bad oil-pressure relief
valve; they didn't think of the disconnected wire, so
you've "out-clicked" them, John!

Graham
90 GL auto country homes camper

--- John Rodgers <jhrodgers@CHARTER.NET> wrote:
> I left off where the all the warning lights came on
> in the instrument
> panel, and I left the highway and stopped. I got a
> tow truck and got the
> Red Brick home. This was on Thursday night. That
> same night I went and
> got a belt set from my flaps.
>
> This morning, Friday, I installed the new belts.
> Checked the oil....it
> was midway between the marks, and checked the water
> level.....it was ok.
>
> Got in the van and started the engine. Started right
> up. Oil light went
> off, no buzzer,  engine idled nice. I let it warm up
> a bit. Then pulled
> out of the drive to go around the block.
>
> Once in the street ...and going up hill.....suddenly
> the oil pressure
> light comes on and the buzzer sounds. So switch off,
> swing around and
> coast back into the driveway. Go read Bentley.
>
> HHMMM. In the Lubrication section, Bentley says
> there are two pressure
> switches( I knew that) and the one on the side of
> the engine is set to
> function between 2 and 6.5 lbs pressure, turning the
> oil light off. The
> rear switch activates at 13.6 psi and turns the
> light on as well as
> activates the buzzer.
>
> Back at the van,  I started the engine. idled
> beautifully, lights and
> busser off. I revved to 2000 rpm, light and buzzer
> still off. I revved
> again!! The instant the rpm hit 3000 the oil
> pressure light came on, and
> the buzzer sounded. I shut her down.
>
> Back by the engine, I turned my flashlight beam down
> in behind the belts
> and sure enough, I could see the naked connector end
> of the high
> pressure switch. So I went fishing to find the wire
> and connector that
> hooks to it, found it and pressed it on. Started the
> engine, ran my
> little test, and it ran perfect. No lights and
> horns.
>
> So that is the story.
>
> If you have never had this particular experience, I
> suggest you simulate
> it so you get to actually hear the buzzer and see
> the light flash. All
> you have to do to simulate this is to remove the
> connector on the
> switch, start the engine, then gently rev to 3000
> rpm. It will do fine
> until you hit the 3000 mark. Try it, you really
> should hear that buzzer,
> so you will know what it is when it happens.
>
> Don't forget to reconnect the pressure switch wire.
>
> John Rodgers
> 88 GL Driver back on the road

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