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They mentioned it having a Series 2 harness, so I'm betting it's got a generic L67 tune (classic option is 98 or 99 GTP file). The cruise is tied into the ABS as a check in those cars, so it doesn't stay on while you're hydroplaning, etc. Not totally necessary to keep, but a scanner may have the ability to see the "cruise enabled" signal and can probably check wiring power with a multimeter.

There's a huge amount of archived Fiero swap info on the fiero.nl forums. I can't find it right now, but I believe they have a wiring diagram that may include cruise items.
 
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