I know what you are talking about, I have a 90 & 91 harness & the 91 has one connector. It is either red or brown, hard to tell it is kinda ditry right now. I don't think that harness will work in an 88.I tried the 90 harness in an 87 once and the fuel pump wouldn't come on and it had 2 connectors like the 87. But when it was swapped an 89 harness everything worked fine.
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Mike
My 86GT site
[This message has been edited by Coolbreeze (edited 10-05-2001).]