Also not sure how I'm going to actually test the wiring on the ECU as the plugs are clamped in place with some kind of security bolts so I can't just take the ECU connectors off to test for continuity between pins.
Its impossible to tell whilst still on the car which ECU is what and what plugs are what so I can't just poke into the back of it.
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Current: 2004 D3 4.0 TDI V8 in Crystal Blue.
Factory: finger print, tv, xenons, keyless entry & go, soft close boot, 19s, and probably lots more besides
Done: fixed headlight washer leak, fit Bluetooth in place of factory phone
To do: DAB, DTV, fix soft close boot, get a spare key, investigate NSF bushes,
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