75driver - Thanks for the link. I've particularly noted
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"Below is a picture of the underbonnet fusebox with the main relay removed

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Terminal 86 and Terminal 87 should be at 12v irrespective of ignition position.
Terminal 30 should have continuity to pin one of connector one on your ECU Yellow/red
Terminal 85 should have continuity to pin nine of connector one Black/Pink
Having looked at the diagrams, I'd be prepared to lay money that the connection between T85 and pin nine is open circuit."
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On measuring across the relay coil, I get 12v. Relay connections 85 and 86.
But 86 to 87, I get nothing.
I didn't get to buzzing out the lines to the ECU.
On an interesting note, when the relay is unplugged, there is not a light pump sound buzzing at the front left of the engine bay. When plugged in, I can hear the buzz.
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Atlan Do you also have an electrical fault with the injector loom? Check circled area at 3.01 in video clip
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- I'll check this on return of daylight!
Thanks Big Russ. There's corrosion around some components, it would be interesting to look at that in more depth. I'll buzz out the lines and take it from there!
Trikey - I'm hoping to understand a little bit more about what the ECU is supposed to be doing and what it is doing before writing it off!
Cheers,
Paul.