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sigma alarm not de immobilising?

I have a 90 bmw e30 with a sigma alarm.

Parked up but now it arms/locks, disarms/unlocks but will not start. ie the starter motor doesn't kick in!

Is this an alarm issue or starter motor / ignition issue?
James, February 2009
reset alarm by take batt neg off turn on ign leave in on postion then connect battery this resets alarm.

phil, March 2009
link Click here to see other fixes for Sigma.