Other than length, what's the difference between an '88 Thunderbird 5.0 harness and a Mustang GT (Fox body) harness?
I don't think there is a difference.
I need a new one. I think I'll grab a Stang harness and try it out then. Thanks Kitz.
There are differences.
If you use a Mustang harness, be sure it is for an automatic transmission car.
Read the following: http://forums.corral.net/forums/general-mustang-tech/1094179-oxygen-sensor-harnesses-manual-auto-differences-year-differences.html
Maybe I'll just find one from a Thunderbird. I have a 5 speed now, but the harness never gave me an issue due to the swap.
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I think you can use the auto on a stick,but not the other way.
Forgot you went 5 speed.
You can use an auto harness with a manual trans, but not all functions are there. Are you still running the main harness that came with the car?
Yep, same main harness. I'll wait til I can get one made for our cars.
If I remember correctly most everything was the same but a few connectors for the tab and tad solenoids, and the length of the O2 sensor harness. I made some plug and play extensions for mine to work when I changed the exhaust.