I have a 88 HF cr-x that I am thinking about swapping all my stuff thats in my 90 CRX Si into. At the firewall, where the main wiring loom plugs into the lead loom, on the Si there is three white connectors, and on the HF there is only two, what is the third connector for? The third smaller connector has six wires that are run through it.

BTW the harness on the Si was on a B16A1 and is now on a B18A1

 

ttt

 

The harnesses are different in between the years. The 88 is different than the 91 harness.

 

does the 90-91 integra OBD0 harness have two or three plugs at the firewall?