98 usdm gsr in 94 ls, all of the wiring goes in but there is one plug with 3 wires coming from the motor, i believe the colors are red, white/orange, and yellow. At first i thought it was for the iab but that is only 2 wires, anybody know off the top of there head?

Also just to clarify, pinouts for all obd1 ecu's are the same correct? specifically knock and iab will be in the same location on obd1 ecus? Thanks

 

wow i did the exact same swap in my car about 2 months ago.. which wire harness are you using?

 

https://honda-tech.com/zerothread?id=1446384

 

Im using the obd2 usdm wireharness, using a obd1 p72 and am wiring in vtec/iab/knock.