Resolved 1G Engine Harness

[CPHunter]

Can someone just confirm everything so another dumb a** person like me , doesn't buy 5 harnesses to realize none of them work...

90 turbo harness - 90 car only
91-94 Turbo Harness Manual - Manual specific , Will not connect under Dash to Auto
91-94 Turbo Harness Auto - Auto Specific , Will Not Connect under Dash to Manual

 

[TheMadCheshire]

I know for a fact the 91-94 auto harness will work with a manual. You will just have a few extra connectors that don't do anything and will just hanging out. You will need to bridge the park/neutral switch wires to make the car start(can jumper at the connector or just splice the wires together. I actually converted my auto to a manual and used the exisiting harness. When I went nuts and tore everything out, I actually stripped down my engine harness and got rid of all the auto pieces.
The engine harness has very few things that actually integrate with the dash harness.
The manual harness will work in an auto, but obviously won't run the auto.
I'd highly recommend finding a harness from the 1g body you have; i.e. if you have a 91, get a 1ga.

 

[19Eclipse90]

It's the engine harness to body wiring harness that has two different connectors on the '91-'94 auto vs. manual.

One is on the driver side of the center console kick panel; it comes from the same loom as the ECU connectors: The 1990 Engine Control Wiring Harness - C67

The other is in the passenger side kick panel; it is part of the small branch coming through the firewall to the interior made up of three other connectors that actually connect to something (along with the O2 sensor check connector which is normally open): The 1990 Engine Control Wiring Harness - C58