Hi Mike.
On Sat, Apr 19, 2008 at 4:10 AM, Mike S <mikes@flatsurface.com> wrote: > At 09:25 PM 4/18/2008, neil N wrote... > > > > One thing I had to do, was run a jumper between 30 and 86 on FP relay. > > In Bentley, it shows an internal connection doing the same (though > > there's no "86" shown): > > > > http://tubaneil.googlepages.com/FPrelaydiagram.jpg/FPrelaydiagram-full.jpg > >
> Because the Jetta relay doesn't have an "86" terminal. I doesn't have 4 > contacts. It sounds like you're using a generic Bosch type relay (4 or 5 > contacts, 2 for coil, 1 for relay arm, 1 or 2 for relay contacts).
Yes. Except for the resistor and larger 30 and 87 contacts, FP relay is a generic 4 contact relay. It is labeled 167. (came from donor) Relay numbers listed for fuel pump *and* glow plug relay in Jetta Bentley are: 67, 80, 167, 102, 104 Here's how I set up 167 relay: - "Vanagon" B+ to 30 - 87 to FP + - B+ from relay 30 "jumered" to 86 - Ground signal from ECU to 85. I think it's wired so that no matter what, if the ground from ECU is interrupted, the fuel pump will stop running. I guess I could test that theory once engine is running right. Start it and pull the ground from the ECU. Not sure if that would adversely affect ECU though...
> > My potentially trivial quesiton: > > > > In diagram on fuel pump relay, there is an icon between 85 and 86. I > > looked inside and there was a resistor. > > > > Why is that resistor there? > >
> You'll have to provide an image, it's not shown (86) on either of the > pictures you posted: > http://tubaneil.googlepages.com/jettafinal1.jpg/jettafinal1-full;init:.jpg > http://tubaneil.googlepages.com/FPrelaydiagram.jpg/FPrelaydiagram-full.jpg
Sorry. I meant the diagram on the relay itself. Pics of fuel pump and power relay (click image for larger view): http://tubaneil.googlepages.com/relays Interestingly, the power management relay (pic in link further down) has 4 contacts, but one isn't labelled on the bottom of relay. It only needs 3 wires as it is internally wired from 30 to one side of the coil. Similar or same as what you were saying about the FP relay, as per Jetta Bentley diagram.
> Maybe you're talking about the J17 relay on the second diagram??? Between > 85 and 30 is the relay coil (electromagnet). The dashed horizontal between > it and the relay contact arm indicates a mechanical linkage. Contacts are > normally shown with the relay in the unenergized state, so for this relay, > putting power between 85 and 30 would connect terminals 30 and 87.
Yes. Was referring to J17 (link originally posted in this thread): http://tubaneil.googlepages.com/FPrelaydiagram.jpg/FPrelaydiagram-full.jpg So is the solid line from 30 to the unlabeled contact a connection?
> The resistor which you may find in parallel (across) the relay coil is a > damping resistor (and is not shown in the diagram), it helps to reduce the > voltage spikes caused when the relay is de-energized, and the stored > magnetic field collapses (like happens with an ignition coil). Ah ok. Thanks. For sure I saw a 1/4 or 1/8 watt resistor in FP relay #167. After studying some Bosch relay diagrams online, I found there were some with a diode incorporated in a given relay. Used for a similar purpose IIRC. Thanks for explaining that. Neil. |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.