Everyone,

Assuming David has normal VW wiring to the fuel pump, the following is what
I have done in my 1991 Vanagon to accomplish what I believe David hopes to
do.

For power, I ran a wire from the back of the fuse box to an on-off
switch(type and location will remain a secret since it is a "secret
cut off
switch").  I then ran a wire from the switch and under the van to the engine
compartment.  Over on the right hand side of the engine compartment (behind
the air filter enclosure) is a connector for the wires to the fuel pump. (It
may be in a different location on older vans).  I installed a relay by that
connector.  For lack of better terminology, the connector has two parts ---
A plugs into B.  From A, I ran a new wire from the RW wire to #30 on the
relay.  From #87 on the relay, I ran a new wire to the RW wire on B.  I ran
a new wire from the ground wire in A to B.   I installed a ground wire from
#86
on the relay to the chassis.  The wire I ran from the front of the van to
the engine compartment, I attached to #85 on the relay.

Now, when the secret on-off switch is in the off position, the engine
cranks, but since the fuel pump is not receiving power, the van will not
start.  Works like a charm and has been for almost 3 years and 20,000 miles.

If I wish to go back to stock, I just pull the wires I added and plug
the original connectors together.

Hope this helps someone,

Harold

--
Harold Teer
1991 Westy

On Nov 15, 2007 5:49 PM, Jake de Villiers <crescentbeachguitar@gmail.com>
wrote:

> Good point Mark, but the suggested approaches still apply. You could put a
> switch in the fuel pump feed that's under the van and kill it that way.
>
> On Nov 15, 2007 2:28 PM, Mark Drillock <mdrillock@cox.net> wrote:
>
> > I guess few noticed that he said he has a SUBARU conversion. Without
> > specific info about the wiring modifications that were made in HIS
> > conversion it may not help to suggest approaches that presume VW ECU and
> > VW support wiring.
> >
> > Mark
> >
> > Scott Daniel - Shazam wrote:
> >
> > > Thanks for saying what you are trying to accomplish.
> > > Your idea is sound, and you could interrupt any of 3 wires at  the
> fuel
> > pump
> > > relay,
> > >  - the 'supplies ground' signal from the ECU.
> > >  -the power supply wire to the relay,
> > >  - or the 'hot signal coming out' wire that goes to the fuel pump.
> > > I'd access the fp relay in that black box above the coil, figure out
> > which
> > > is the main relay and which is the fuel pump relay and proceed
> > carefully.
> > >
> > > It really is clearly indicated in the Bentley current flow diagrams,
> tho
> > > they are funny to read at first for sure, but if you find the current
> > track
> > > for 'fuel pump' .....you should be able to see the pump, and the
> relay,
> > even
> > > how it works internally, if you understand the basic principle of a
> > relay
> > > anyway. .  They don't always show things really well, but on these
> basic
> > > circuits, they're ok.
> > > Scott
> > > www.turbovans.com
> > >
> > >
> > > -----Original Message-----
> > > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
> Behalf
> > Of
> > > David O'Bryan
> > > Sent: Wednesday, November 14, 2007 3:01 PM
> > > To: vanagon@GERRY.VANAGON.COM
> > > Subject: Fuel pump relay cutout switch
> > >
> > > Help.  I'm helpless when it comes to reading a current diagram (but I
> > really
> > > did try).  I want to install a cut out switch on the wiring to the
> fuel
> > pump
> > > relay and cannot figure out which wire from the ignition switch area
> > will do
> > > that.  I want to run the lower power wire that energizes the relay
> thru
> > a
> > > switch as an anti-theft device.
> > >
> > > Any help is appreciated.  :-)
> > >
> > > Regards,
> > >
> > > Dave O
> > > '87 Westy
> > >
> >
>
>
>
> --
> Jake
> 1984 Vanagon GL
> 1986 Westy Weekender "Dixie"
> www.crescentbeachguitar.com
> http://subyjake.googlepages.com/
>

--
Harold & Faye Teer
1991 Westy
Harrisonburg, VA