EEC IV Wiring

[Enoch]

Thought I would have a look at my wiring loom today as I am fed up with bodywork. I can't work out for the life of me how the engine loom picks up a switched 12 volt feed. I have the haynes manual which says that pin 1 is a 12 v feed from a black/ blue wire. Mine is Red. It kind of goes downhill from there. I have two relay sockets that were located next to the ECU, I assumed these are the two engine management relays but none of the colours match to the Haynes diagrams and only one relay is installed( may have lost it, there may have originally only been one - can't remember). Am I going mad or are my engine management relays actually located elsewhere and the ones I think are the management relays are something else? I am trying to use the engine sub loom as is but can't work out where the switched feed comes from - my diagram seems to suggest the live from the ignition switch goes off to the alarm and then back again - can anyone confirm this? Also can someone confirm that I should have two yellow engine management relays?
Thanks in advance,
Dave.