By red, do you mean real dark red, or perhaps brown?  If so, that is the .3
bar switch, which should go between the #3 and #4 pushrod tubes.

Karl Wolz

----- Original Message -----
From: "clerkin" <clerkin@STUDENTS.UIUC.EDU>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, July 13, 2001 8:58 PM
Subject: Re: 86 vanagon Oil Pressure Switch

> I did this, and now I get both of the lights lighting up. I think
something
> might be really screwed up with how the wiring is done. When I removed the
old
> switch from the back, it was red. In the manual it says that the 1.8 bar
is
> white and the .9 bar is grey. Mine was neither of these colors. Any ideas
on
> what the red switch is for?
>
> Thanks,
> Patrick
>
>
> >===== Original Message From "Jay L Snyder" <Jay.L.Snyder@usa.dupont.com>
> =====
> >The Dynamic Oil Pressure System isn't so dynamic.  It failed on my '89
> >Jetta also.  What I  did was ground the high pressure switch wire to keep
> >the DOPS happy.  I installed a gauge to see real pressure and also wired
in
> >two lights so I can see what the switches are actually doing.  The low
> >switch (on the end of the head--this is a diesel) is "on" at start-up and
> >immediately goes out at 5-7 psig.  The other switch (at the oil pump)
> >closes above 20 to 25 psig.  I have a red-light for low switch (kaboom)
and
> >a green light (OKie-dokey) for the high switch.  The dash light still
works
> >off of the low switch, I just don't get the obnoxious intermittent buzzer
> >anymore.
> >
> >
> >
> >
> >clerkin <clerkin@students.uiuc.edu> on 07/13/2001 01:59:15 PM
> >
> >To:   Jay L Snyder/AE/DuPont
> >cc:
> >Subject:  RE: 86 vanagon Oil Pressure Switch
> >
> >
> >
> >
> >I'm definately putting in a guage, but I'd like to get it working for
when
> >my
> >girlfriend or anyone else needs to drive it.  Does anyone know the part
> >number
> >of the circuitry?  In the Bentley manual it lists a dynamic oil pressure
> >system control unit and a printed circuit.  These must be two separate
> >things.
> > Any ideas on the part numbers?
> >Thanks,
> >Patrick
> >>===== Original Message From "Jay L Snyder" <Jay.L.Snyder@usa.dupont.com>
> >=====
> >>It is probably your Dynamic Oil Pressure system circuitry that is bad.
> >Put
> >>in a frickin' guage!
> >>
> >>
> >>
> >>
> >>clerkin <clerkin@STUDENTS.UIUC.EDU> on 07/12/2001 10:36:38 PM
> >>
> >>Please respond to clerkin <clerkin@STUDENTS.UIUC.EDU>
> >>
> >>To:   vanagon@GERRY.VANAGON.COM
> >>cc:    (bcc: Jay L Snyder/AE/DuPont)
> >>Subject:  Re: 86 vanagon Oil Pressure Switch
> >>
> >>
> >>
> >>
> >>OK well now I'm really stumped.  The light flickers all of the time
still
> >>until it warms up.  What happens is that the high pressure switch no
> >longer
> >>grounds at low rpm's when it is warmed up because of the lower pressure,
> >>but
> >>as soon as I go over 1500 it starts flashing again.  The light flashes
> >when
> >>the switch is grounded, but not when it isn't.  I think this is the
> >>opposite
> >>of how it is supposed to work?  From looking in the Bentley manual, it
> >>looks
> >>as if the low pressure switch is open over .3 bar and the high pressure
> >>switch
> >>is grounded over .9 bar.  Which is what appears to be happening on my
> >>vanagon.
> >> Any ideas?  The only thing I can think of is that I might have fried
the
> >>pc
> >>board somehow when installing the switch.
> >>-Patrick
> >>>===== Original Message From Karl Wolz <wolzphoto@WORLDNET.ATT.NET>
=====
> >>>Is it possible that the wire is grounded somewhere else along its path?
> >>>They're notorious for being singed by the exhaust.
> >>>
> >>>Karl Wolz
> >>>
> >>>----- Original Message -----
> >>>From: "clerkin" <clerkin@students.uiuc.edu>
> >>>To: "Karl Wolz" <wolzphoto@WORLDNET.ATT.NET>; "vanagon"
> >>><vanagon@GERRY.VANAGON.COM>
> >>>Sent: Thursday, July 12, 2001 5:58 PM
> >>>Subject: RE: 86 vanagon Oil Pressure Switch
> >>>
> >>>
> >>> OK, well I put the switch in, but now the light just blinks at me.  No
> >>>buzzer
> >>> or anything.  It blinks at me all the time.  It does the same thing
> >when
> >>I
> >>> take the wire to the sensor and ground it.  Isn't that what the switch
> >>is
> >>> supposed to do, ground at .9 bar?  Does it sound like now the other
> >>switch
> >>>is
> >>> bad?
> >>>
> >>> Thanks,
> >>> Patrick
> >>>
> >>> >===== Original Message From Karl Wolz <wolzphoto@WORLDNET.ATT.NET>
> >>=====
> >>> >Yeah.  Once you've done it three times n a week, it's real easy!
> >>> >
> >>> >Grab yourself a 13mm wrench and take of the water pump pulley.  If
you
> >>do
> >>> >this, you've got pretty easy access to the sender.  The job is about
> >>>8000%
> >>> >easier if you use the correct tool, which is a deep well 24mm socket.
> >>> >Easiest is to put the socket on the sender and then put the wrench on
> >>the
> >>> >socket.  Due to space limitations, you're better off using a breaker
> >>bar
> >>> >instead of a ratchet.
> >>> >
> >>> >Once you've loosened it a bit, it should only be finger tight and an
> >>easy
> >>> >turn off.  Some say you need to use a screwdriver to push the sheet
> >>metal
> >>> >out of the way, but I didn't really need to do that.
> >>> >
> >>> >Karl
> >>> >
> >>> >----- Original Message -----
> >>> >From: "clerkin" <clerkin@STUDENTS.UIUC.EDU>
> >>> >To: <vanagon@GERRY.VANAGON.COM>
> >>> >Sent: Thursday, July 12, 2001 12:28 PM
> >>> >Subject: Re: 86 vanagon Oil Pressure Switch
> >>> >
> >>> >
> >>> >> Well I got the right switch (the gray one) but I can't seem to
> >figure
> >>>out
> >>> >> where it goes.  Do you access it from above or below?  There seems
> >to
> >>>be
> >>> >some
> >>> >> sheet metal that I cannot get out of the way to get to the switch.
> >>Any
> >>> >ideas?
> >>> >>
> >>> >> Thanks,
> >>> >> Patrick
> >>> >>
> >>> >> >===== Original Message From Karl Wolz <wolzphoto@WORLDNET.ATT.NET>
> >>>=====
> >>> >> >Hi Patrick,
> >>> >> >
> >>> >> >You're dealing with two different animals here.
> >>> >> >
> >>> >> >The gauge sending unit screws into the low pressure outlet
(.3bar).
> >>>The
> >>> >> >1.8/.9 bar switch screws into the high pressure outlet, which is
> >>>located
> >>> >to
> >>> >> >the left of the main pulley and under the water pump.  Installing
> >>the
> >>> >gauge
> >>> >> >unit will not make your buzzer stop.  You need to pick up a .9bar
> >>>sender
> >>> >and
> >>> >> >replace the 1.8 bar with it.
> >>> >> >
> >>> >> >Karl Wolz
> >>> >> >
> >>> >> >----- Original Message -----
> >>> >> >From: "clerkin" <clerkin@STUDENTS.UIUC.EDU>
> >>> >> >To: <vanagon@GERRY.VANAGON.COM>
> >>> >> >Sent: Monday, July 09, 2001 4:34 PM
> >>> >> >Subject: 86 vanagon Oil Pressure Switch
> >>> >> >
> >>> >> >
> >>> >> >> I have a 1986 vanagon with an oil pressure light and buzzer
which
> >>>comes
> >>> >on
> >>> >> >> when the vehicle is warmed up and is above 2000 rpm.  It will
> >also
> >>>go
> >>> >out
> >>> >> >> around 3500 rpm.  The engine was rebuilt about 30k ago and the
> >>light
> >>> >came
> >>> >> >on
> >>> >> >> immediately.  When the mechanic was called about the problem, he
> >>>said
> >>> >that
> >>> >> >he
> >>> >> >> must have put the wrong oil pressure switch in.  It has been run
> >>>like
> >>> >this
> >>> >> >for
> >>> >> >> 30k without any problems, but I want to fix the problem (better
> >>late
> >>> >than
> >>> >> >> never.)  I decided to upgrade to a VDO guage and sender from the
> >>Bus
> >>> >> >Depot,
> >>> >> >> but the guy I talked to on the phone didn't seem like he had any
> >>>idea
> >>> >what
> >>> >> >was
> >>> >> >> going on.  He told me that they did not sell the stock switch,
> >and
> >>>that
> >>> >> >the
> >>> >> >> only thing they had was the VDO switch and guage.  He also told
> >me
> >>>that
> >>> >> >their
> >>> >> >> VDO guage is not the dual guage (allowing both the idiot light
> >and
> >>> >guage
> >>> >> >to
> >>> >> >> operate) which is in contradiction to their website.  In
checking
> >>>their
> >>> >> >> website I have found both of these statements to be false, but
in
> >>>their
> >>> >> >> defense, the man said Ron was gone and would return in a few
> >days.
> >>>He
> >>> >> >said I
> >>> >> >> should call him about any specific questions.  Since I am still
> >>>unable
> >>> >to
> >>> >> >get
> >>> >> >> any answers at the Bus Depot I thought I would try the list.
> >>> >> >>
> >>> >> >> 1.  Is the dual VDO guage set at .9 or 1.8 bar?
> >>> >> >> 2.  Is it normal for an engine with the improper switch to flash
> >>>it's
> >>> >> >idiot
> >>> >> >>    light?
> >>> >> >>
> >>> >> >>
> >>> >> >> Thanks,
> >>> >> >> Patrick
> >>> >> >>
> >>>
> >>>
> >>>