Re: Post '94 wiring harness variations - Saab 9000 Bulletin Board - Saabnet.com
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I think the auto transmission, which works on pressures and valves rather than electronics, gets most of its information from its vacuum connection. To my knowledge the actual ECU is the same for CS manuals and autos, at least after 1994, and I'd be surprised if the loom was different, just some stuff might be there but redundant (like when I added cruise control to my '97)
There is an orange wire from the auto shift selector to pin 14 of the ECU which tells the ECU that it's dealing with an automatic transmission. One added effect is to keep the idle speed correct when in gear
My experience with a 1993 automatic is that if you cut this wire you get manual-level boost. In your transplant there'll be nothing to connect it to so this will happen by default
Auto drivers can test this by removing Fuse #9. It may take a little time to adapt. However this nukes the sunroof and front windows, until you put the fuse back of course, so don't try this when expecting rain
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