Date: Sun, 20 Apr 2008 09:51:52 -0700
Reply-To: neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: neil N <musomuso@GMAIL.COM>
Subject: Re: '86 Westy cranking trouble
In-Reply-To: <480B209C.9000101@earthlink.net>
Content-Type: text/plain; charset=ISO-8859-1
Gold info man!
I might add, that I found DeOxit to be an *awesome* contact cleaner.
There is another product a list member kindly mentioned to me: Rid-ox.
It may very similar, or the same.
And thanks for clarifying Mark. One of my posts may have been misleading.
I quoted from the "newer" version of '86 Digifant wiring.
It shows a "keyed" (from 15) black/white wire from coil to "Digijet
Control Unit Relay". If I'm not mistaken, power from this wire
energizes the relay electromagnetic coil of this relay.
But...... I just noticed that they labeled this relay Digijet, but the
control unit is Digifant !!
Yikes! Bentley '86 wiring diagram shenanigans! --- ;^)
Neil.
On Sun, Apr 20, 2008 at 3:53 AM, Mark Drillock <drillock@earthlink.net> wrote:
> As Neil pointed out, there are 2 very different wiring diagrams for 86.
> It sound like you have the early version of that wiring. What are the
> last 8 digits of your vin# ?
>
> The 2 engine relays are mislabeled in the wiring diagram for the early
> 86!!! This is clear from the fact that the one labeled "fuel pump relay"
> is not the one that connects to the fuel pump wiring!
>
> The relay mislabeled "fuel pump" is really the "power relay" that
> supplies everything in the early 86 model.
>
> Don't worry about relay socket 2 of the main fuse panel, it is empty for
> waterboxers. Also, realize that the green wires to/from the coil are for
> ignition pulses not power.
>
> Your use of a jumper wire to test and bypass is a great approach. You
> are very close to fixing this I'd guess.
>
> You are not the first on this list to have a problem in the wiring of
> the black twin relay box. Try unplugging the connector to the outside of
> the twin relay box. Look closely at both sides of the connectors, clean
> if needed and plug back in. It may be as simple as this.
>
> Power on from the key comes to the engine compartment on a black wire.
> On the early diagram there is a labeling error and this wire is labeled
> "sw" which is German for black. This error is on page 97.72, top right
> at connection pin D15. That is power on from the key which then turns on
> the "power relay" which is wrongly labeled "fuel pump relay".
>
> Again, most of the above is for the early 86 diagram and the wiring in
> this area changed drastically after a few months of production. The
> later engine harness wiring is simpler and improved.
>
> Mark
>
>
>
>
>
>
>
>
>
> Dan Hall wrote:
>
> > I have an '86 Westy Weekender, Wolfsburg edition---pop-top but no
> > kitchen.
> >
> > In the past several weeks, I've had a mysterious, intermittent
> > starting problem. The starter works and the engine turns over fine
> > but won't crank.
> >
> > The fuel relays and, thusly, the fuel pump were not cycling when I
> > turned the ignition switch.
> >
> > I discovered that if I lightly tapped on the fuel relay box above the
> > coil with the key switched on, the relays would click on and the fuel
> > pump would cycle and I'd start it up and off I'd go.
> > Thinking it was bad relays, I bought replacements. That solved nothing.
> > I've since bench tested the relays and they work fine.
> >
> > The big red wires that supply constant current to the fuel relays have
> > 12 volts.
> >
> > There is a black/yellow wire that runs from the fuel relay to the
> > coil. The Bentley says this wire is Black/White but mine is black/
> > yellow. With the ignition switch on, I only had 5 to 6 volts on this
> > wire. Tap the relay with power on and the relays work, fuel pump
> > cycles. Then, I tried to start the van as usual after and it turned
> > over fine but would not start. Now, that same black/yellow wire shows
> > only 1.2 volts. The relays will not work, even with tapping.
> > I plugged in a borrowed Digifant ECU but that did not help the
> > situation. I put the old ECU back in.
> >
> > I ran a jumper wire with 12 volts to that black/yellow wire on the
> > coil and the relays and fuel pump all worked nomially.
> >
> > I had a spare ignition switch and tried that but no joy.
> >
> > I've studied the wiring diagrams of the Bentley til I'm cross-eyed.
> >
> > Where does the coil get its voltage supply?
> > ----My Bentley shows from a relay in the 2 position on the panel next
> > to the fuses in the wiring diagrams but not in the legend of the same
> > pages. And I've never had a relay in the 2 postion.
> > -----I tested the resistance of the coil and it seems within
> > specifications.
> >
> > What voltage should I have on poles 1 and 15 on the coil with the
> > ignition turned on?
> >
> > I have thought about leaving the 12 volt jumper wire hooked up the
> > coil and then try starting it but am holding off til I hear from the
> > List.
> >
> > Any help, advice, guesses would be appreciated.
> >
> > Dan Hall
> > '86 Westy Wolfsburg Weekender
> > "Das Boot"
> >
> >
>
--
Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"
http://web.mac.com/tubaneil
http://tubaneil.googlepages.com/
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