I kinda butchered my engine harness when I went to carb on the SD4.
I basically removed the TBI related sensor components at that time.
Then I made a few changes when I swapped from an automatic to a manual transmission.
...and a few more changes when I switched to electronic cruise control, added 3rd brake light etc.

Now I'm looking at installing to a fuel injection system of sorts, and the logical place to start is
with another STOCK TBI wiring harness that will have all the sensor connectors etc in place.
The ECM I'm using will likely be a 1227165 coded to run a Throttle Body 2-Injector system.
I found an 85 harness, but using it would entail much more work to the car itself than it's worth.


I'm looking for an 84 locally and in surrounding area, but just in case I can't find one....


Anyone have an 84 engine wiring harness complete to ECM/chassis connectors with A/C and automatic preferred ?


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Calgary time/temp

3.4L Supercharged 87 GT Click me
Super Duty 4 Indy #163 Click me

[This message has been edited by fierosound (edited 05-20-2014).]

I sent an email inquiry to Fiero Factory the other day. Got a reply.
Fiero Factory wants $300 + shipping/handling. I know that isn't NEW ...
I'd guess that's what they paid for the entire parts car.

Still looking for one. Doesn't anyone have a parts car?

[This message has been edited by fierosound (edited 05-23-2014).]

PM sent.

Too bad the Pick n Pull harness I got was an 85. Only cost $40.

Guess I'll keep looking...

[This message has been edited by fierosound (edited 05-23-2014).]

Looks like I have a potential harness lined up.

I also received pictures from someone of what was supposed to be an 84, but I could see that the wiring on the firewall looked like an 85.
It may be possible that the LATE 84s had the new wiring that moved the C500 connector to the battery area.

HERE's how the 84 wiring harness is configured on the firewall of my Indy (not my engine bay obviously)

Upper left through the firewall is the engine harness to ECM.
In the center is the C500 connector which comes apart - one harness ties back into the engine harness.
The other is the harness into the left rear fender to feed all the tail-lights and such.
The upper right harness through the firewall is the main harness that terminates at the fuse box and dash cluster.

[This message has been edited by fierosound (edited 05-25-2014).]

PM sent.