I wonder if you might be able to use a slightly later ecu than 93. As far as I know there isn't any connection to the ecu on cars fitted with the dealer fit alarm. Later cars after 95 had different wiring and alarms that are built in, or that is what I though to be the case.
My car runs ok without the alarm and only needs 1 connector bridging to make the starter work. That is with 940 wiring though, so I might not know the full story.
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