Your '85 instrument cluster wiring harness cluster is missing wire #12.  The
'86 and older Vanagons use this wire for the oil pressure alarm circuitry.
Run a ground to the #12 terminal of the harness, like Ken mentioned, and the
alarm should stop.

If you can't read the numbers on the harness this how the '85 wires are
ordered.
1  2  3  __  5  6  7  8  9  10  11  __  13  14

So you're missing #4 and #12.    HTH -John

<html><DIV>'85 Silver Sunroof&nbsp;&nbsp;&nbsp;O===O&nbsp;&nbsp; <BR>'91 GTi
2.0 8v&nbsp;&nbsp; Oo=oO&nbsp;&nbsp; <BR>'76 BMW 2002&nbsp;&nbsp;
O=00=O&nbsp;&nbsp; </DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV></html>

&gt;From: Ken Lewis &lt;kdlewis_wasting_time@ACCESS4LESS.NET&gt;
&gt;Reply-To: Ken Lewis &lt;kdlewis_wasting_time@ACCESS4LESS.NET&gt;
&gt;To: vanagon@GERRY.VANAGON.COM
&gt;Subject: Re: Wiring tach triggered oil pressure alarm - ?? - help
&gt;Date: Sun, 25 Apr 2004 19:15:58 -0400
&gt;
&gt;Sam,
&gt;The circuitry is looking for an input from a sensor your van does not
have.
&gt;You need to find that input and ground it.
&gt;
&gt;Ken Lewis
&gt;86 Transporter Crew Cab
&gt;60 356 T-5 Porsche
&gt;http://neksiwel.20m.com/
&gt;Vanagon tech, pixs, O2 monitor gadget
&gt;----- Original Message -----
&gt;From: &quot;Sam Walters&quot; &lt;sam.cooks@VERIZON.NET&gt;
&gt;To: &lt;vanagon@GERRY.VANAGON.COM&gt;
&gt;Sent: Sunday, April 25, 2004 6:23 PM
&gt;Subject: [VANAGON] Wiring tach triggered oil pressure alarm - ?? - help
&gt;
&gt;
&gt; &gt; Today I finally got around to finishing wiring the tach in my 85
&gt; &gt; Wolfsburg Weekender.  It has an 87 dash that I put in months ago.
&gt; &gt;
&gt; &gt; Only problem is that when I connected the wire to the coil, the
oil
&gt; &gt; pressure alarm and light started going after a few minutes or when
it
&gt; &gt; gets over about 3500 rpm - can't exactly tell what is the trigger
&gt; &gt; point.  Tach works great.  Nice smooth movement, reads exactly as
one
&gt; &gt; would expect from the engine sounds.
&gt; &gt;
&gt; &gt; Van has enough oil.  Oil pressure light and alarm don't come on
when I
&gt; &gt; disconnect the tach wire from the coil, and didn't ever before
today.
&gt; &gt; About 17k on a rebuilt engine from a very reputable rebuilder.
&gt; &gt; Seriously doubt I have oil pressure issues.  Oil pressure light,
as
&gt; &gt; always, lights up at cranking and then goes out.  Reconnect and
they do
&gt; &gt; come on.
&gt; &gt;
&gt; &gt; Haven't driven it very far with it screaming at me.  Of course,
the
&gt; &gt; first time it worried me seriously, but I was only a half a block
from
&gt; &gt; the house.  Stopped, checked the oil, and drove back home.
&gt; &gt;
&gt; &gt; Disconnected, no sounds, so I went for gas and another errand with
no
&gt; &gt; indication of a problem.
&gt; &gt;
&gt; &gt; So, is there some careless error I could have made in wiring, or
&gt; &gt; something about the 87 cluster that would cause this?  Or a likely
point
&gt; &gt; for some sort of short in the cluster wiring?
&gt; &gt;
&gt; &gt; For now the wire is not connected as I have to drive carpool 42
miles
&gt; &gt; round trip in the morning.
&gt; &gt;
&gt; &gt; Thanks in advance for your help.  Not urgent, but it was
frustrating to
&gt; &gt; think I had it all done correctly and then have this unexpected
problem.
&gt; &gt;
&gt; &gt; Sam
&gt; &gt;
&gt; &gt; --
&gt; &gt; Sam Walters
&gt; &gt; Baltimore, MD
&gt; &gt;
&gt; &gt; 89 Syncro GL
&gt; &gt; 85 Westy Weekender
&gt; &gt; 84 Vanagon, original owner, soon to be retired, just too many
problems
&gt; &gt;
&gt; &gt; All incoming and outgoing email scanned by
&gt; &gt; automatically updated copy of Norton AntiVirus.
&gt; &gt;

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