Right near the top of the list of Dumb Things I Have Done was get an immobiliser installed in the Mk2.
Its an Autowatch 674 with remotes.
It stopped working about 2 days after it was installed (about 18 months ago) and I was able to use the car as normal, but after replacing the heater box yesterday, it has decided to live again and is making clicking / buzz noises and generally stuffing everything up. Not much works electrically now.
Can I just cut it out by snipping its wiring loom? Or will that make everything even worse?