Need some help here please....

Car is refusing to start, despite turning over same as always.

Haven't got very far, but confirmed there's no spark.

I'm suspicious of the immobiliser, because of the quality of the installation wiring, but diagrams for these are dealer only. I'm trying to trace 12V power from the ignition switch to the Engine Management Unit, but I can't see a wire on the wiring diagram that goes between them.......

Anyone know if you can still read the fault Codes with a non-firing engine? I'd appreciate some advicce on reading the codes too, I understand this model is not an OBD type?

Thanks for "listening".

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Paul Gibbons
'93 320CE
'73 Jensen Interceptor (Resting)
Giant Full Sus Mountain Bike