Thanks Mike.

It's labelled a "power supply" relay. I understand it supplies power to the ECU.

But you've raised a good question.

Does an ECU typically need power (from 50 connection?) to provide power to ECU so it temporarily supplies grounds to relays such as the fuel pump?

I'm beginning to think that part of the problem, is that fuel pump and ? is not getting power during cranking cycle.

Neil.

On Wed, Apr 16, 2008 at 1:45 PM, Mike S <mikes@flatsurface.com> wrote: > At 03:50 PM 4/16/2008, neil N wrote... > > > > > I guess the simple question is, as per the diagram, do 3/86 and 2 > > actually connect to the relay? > > > > No. The diagram is just showing the internal connections on the relay panel > - those terminals are probably intended for use with a different vehicle > and/or engine, and definitely with a different relay. > > Based on the small section of the diagram shown, I'd guess that is the load > reduction relay. Terminal 30 is battery +. The ECU brings terminal 5/86a > high to remove power from unnecessary components during cranking, so the > starter gets more power. >

-- Neil Nicholson. 1981 Air Cooled Westfalia - "Jaco"

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