I pulled out my wiring harness during my engine rebuild. While connecting it back to the ECU I had a single wire left with apparently nothing to connect it to. The wire comes out of the wiring bundle very near the ECU and has only a single black connector.I don't remember taking it off, it may have just pulled off. Can anyone enlighten me where it might go. I have a basically stock '93 Touring with a manual tranny if that might be important. Thanks in advance.

 

I remember an extra black wire when installing my PFC. Not positive, but I think it has something to do with testing the cooling fans.
Rick