89 wiring harnesses are funny. I believe there are two different grey plug harnesses for that year. Someone correct me if I'm wrong. I would just buy one the same year model as your car to be safe. Also you might have to swap out some sensors on your engine if it's pre 89.
BTW, how many of these threads do you have. I've found two already.
There are at least 2 sets of 89 grey plugs. I have a feeling one set may be the yellow plugs, but colored grey. I had to redo all the pins on my harness, hopefully it'll work when I try to start it up =)
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