[T3] Fuel Pump Relay - 69 Fastback

Jim Adney jadney at vwtype3.org
Mon Jul 12 08:44:53 PDT 2021

On 12 Jul 2021 at 0:55, Jim Adney wrote:

> On 11 Jul 2021 at 21:48, Tim Schiller wrote:

> > I did not cut any wires but did ground the 85 pin. When I turn key on, pump
> > runs. Turn key off pump stops. So I think this tells me pump is good and it
> > is not my ignition. 
> Okay, this tells you that the brain is not grounding that wire, so the relay was 
> not being activated. Does the engine start now?

I just realized that this info contradicts your earlier observation that you 
could hear relays click when you turned the key ON and again ~1 second 
later. Do you no longer get that second click?

If you get that second click, that means that the connection to wire 19 and 
the transistor in the brain are all good. It's still possible that there is 
something in there that's intermittent, so it doesn't always work. The most 
likely candidate would be in T1, where someone has messed with it and 
done a sloppy repair.  

Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA

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