Re: [T3] Fuel pump/warning light relay

["Dave Hall" <dave@hallvw.clara.co.uk>]

Aedan, do you think a Pirelli type calendar is something to aim for next
year?  It might lose us a lot of members, or improve recruitment!  Would be
a lot of fun getting the photos for, though.  ;-)   You are the second
person to suggest this.  We might not get it printed at a reasonable price,
but hey, who cares?

The ECU is in the rear left-hand wing (fender); it's behind the cloth flap
on the left of the boot (rear trunk).  The relays under the rear seat are
the rear screen heater (defogger) and the ECU relay.  The blue/yellow wire
should establish which is which.

It sounds like bad news if the pump stays on with the ignition; the
grounding of the relay power (grey wire) is done by the ECU circuitry, and
it should disconnect this (electronic) ground after a couple of seconds,
making the pump relay turn off again.
Check the ECU relay beneath the rear seat.

However, if the flashers are interfering, it may be a problem there, so
take a few fuses out and see if you can isolate the source and the fault.

Sorry I can't simply tell you there are two wires connected back to front
on the loom - but someone out there might be able to.
How about Speedy Jim on RAMVA (he may have come across soemthing similar in
his long experience).

Dave.
UK VW Type 3&4 Club
http://www.hallvw.clara.net/
----- Original Message -----
From: aedan mcghie/scotland <VKG465J@surak.freeserve.co.uk>
To: Type 3 list <type3@vwtype3.org>
Sent: 26 December 1999 10:55
Subject: Re: [T3] Fuel pump/warning light relay


>
> Fuel pump is always running when the ignition is on, even when the engine
> isn't turning over.
>
> Further more, with the ignition off, if you turn on the hazards the fuel
> pump runs in time with the flashers (on-off-on-off)
>
> The fuel pump relay under the dash seems to be behaving properly when
> checked with an AVO meter (VOM for the US).
>
> There is a 12 V supply switching it on-off-on-off in time with the
hazards
> (measured on the blue/yellow wire).
>

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