Resolved NEED HELP: 90 and 91 wiring harness

[Garman112]

I have a 90 and a 91 awd i am looking to put the motor from my 91 into my 90... i hear the harnesses could be different, I need to know if the 90 harness will plug into all the sensors or if theres a difference? If there is a difference will i be able to switch the sensors to make it work? all help will be greatly apriciated thank you

 

[acrazyjohnny]

you will be able to switch sensors however the two wiring harnesses are different

 

[Paul@RTM]

There are definitely a few differences in a few of the connectors/sensors. I'm not sure if there's an actual list of them, but there aren't that many. You may have to splice a few connectors, etc, but not many at all.

 

[1990dsmkid]

Power transistor, tps, and isc are wired differently but not a huge deal. Simple cutting and soldering is all that is needed. Unless you use all the 90 sensors then you will fine. Only need to worry if you are using all 91 plus parts.

 

[19Eclipse90]

I'm not sure if there's an actual list of them, but there aren't that many.

The 1990 Engine Control Wiring Harness

As has been mentioned, if all the critical electrical components from the '90 are reused, it becomes a direct plug and play. Those are the throttle body sensors (swap the throttle body), CAS, coil pack and power transistor unit.

 

[acrazyjohnny]

sorry I have a completely different gallant vr4 wiring harness I bought. i attempted to put it in my car until I noticed it was completely different when it came to the plugs inside the car so now I am car-less and dam its cold.