If the higher pressure switch wire is grounded then the buzzer is disabled. The lower pressure switch should .3 bar, (14.1 psi/bar). Even in extreme conditions you should be able to satisfy that just above idle.

Dennis,
From my phone.
________________________________
From: Steve Cotsford<mailto:cotsford@AOL.COM>
Sent: ‎1/‎1/‎2014 12:05 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: Re: oil light question

So far I have not heard a buzzer sound.   I may have to check.   The buzzer may be absent .     If the red light is off at 2500 rpm and does not come back on when the engine idles back down, does this signify that oil pressure is adequate?      Thanks Steve

On Jan 1, 2014, at 11:42 AM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:

> At 11:30 AM 1/1/2014, Steve Cotsford wrote:
>> > I was informed that it might well be a defective oil pressure
>> switch and I plan to replace both of them to eliminate that
>> possibility.    Engine is a 2.1 originally from a syncro I believe
>> and mileage is a bit over 100,000 miles.   Installed into my 89
>> Bluestar.   Yes i am not very knowledgeable about WBX engines.
>
> If it is a pressure switch (seems quite likely) it will be the
> low-pressure one on the side of the engine which fails closed.  The
> other switch would fail open and would cause the buzzer to sound as
> you rev over 2,000 rpm.
>
> Yrs,
> d