Thats what im fearing WhO :/ The alarm was useless, I disabled it the day I got the car, Im pretty sure it was about 16 years and so I pulled it out to tidy up the engine bay. I guess I'll have a good look, but all that wiring confuses the hell out of me, how are you meant to tell which is what in a bundle of like 200 wires...

I'll do some more tests and maybe try and follow the wires off the fuel pump relay to see where they go and if there is some sort of imobiliser thing, problem is I cant seem to get the fusebox out far enough to see the back of it.