Date: Sun, 24 Feb 2008 08:55:45 -0800
Reply-To: neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: neil N <musomuso@GMAIL.COM>
Subject: Re: Bentley wiring diagram. Questions on how to read.
In-Reply-To: <47C17C3C.8030801@cox.net>
Content-Type: text/plain; charset=ISO-8859-1
Thanks. Yup. Getting it.
It appears there are 3 relays needed. FP, HO2S, Power Relay. Hence
part of my logic. Plus I figured if I could, I'd take the time to help
make it easier for others doing a conversion using Motronic. i.e. they
just pull the Jetta harness with all needed plugs, the fuse box, and
when it's time to install, they just plug stuff in.
IF in fact that's how it turns out. I'll be testing it out before I
cut holes etc.
For sure. Thanks for the warning. I'll make sure the FP relay is
"safe". Getting its' signal from the ECM.
Thanks again,
Neil.
On Sun, Feb 24, 2008 at 6:16 AM, Mark Drillock <mdrillock@cox.net> wrote:
> Neil, it sounds like you are getting the hang of the Bentley wiring
> scheme now. In any case, there is no good reason to use an extra relay
> panel from the Jetta just to get a provision for the fuel pump relay.
> That fuel pump relay is performing such a simple function that can be
> performed easily by a standard relay in the engine compartment. The
> relay is controlled by ECU pin 6 providing a pseudo ground for the relay
> coil. The power side of the coil is +12 jumpered over from the high
> power input side of the relay contacts.
>
> Whenever the key is on, +12 is provided to both the relay coil and the
> relay contact input. But the ECU only provides "ground" for the relay
> coil whenever IT thinks the fuel pump should run. Be sure to maintain
> this safety feature of only running the FP when the ECU says to.
>
> The fuel pump relay output also provides +12 power for the heater inside
> the OX sensor via the OX heater control module J208.
>
>
> Mark
>
>
>
>
> neil N wrote:
> > Hi all.
> >
> > P 97.57 Vanagon Bentley. Emergency Flasher Relay. A 20 gauge wire
> > stops with reference to track #78. I go to #78 on following page. It
> > stops at the track. I can only assume it goes to ground.
> >
> > And for those with a '93-'99 Jetta Bentley......
> >
> > Diagram 97-18, the fuel pump motor shows one connection to 31 (ground
> > or battery negative) and the other to track #42, then via a 28 pin
> > connector to #41. Both appear to go to ground. Two ground wires to the
> > motor?
> >
> > If a wire on a diagram stops, shows a track number reference in a box,
> > but the track number has nothing going from it, does that simply mean
> > the wire in question goes to ground? If that's the case, then the
> > Jetta fuel pump has two ground connections?? Where's + ?
> >
> > Hope this makes sense. I'm puzzled!
> >
> >
> > --
> > Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"
> >
> > http://web.mac.com/tubaneil
> > http://tubaneil.googlepages.com/
> >
>
--
Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"
http://web.mac.com/tubaneil
http://tubaneil.googlepages.com/
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