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1989 Mustang 5.0 GT O2 sensor wiring harness help needed

10833 Views 4 Replies 3 Participants Last post by  Marunos
We've picked up a 1989 Mustang with a 5.0L engine and 5-speed transmission. Unfortunately, there's no wiring harness from the oxygen sensors into the main harness. We need the 8-pin connector schematic for how it connects into the main harness.

We've been scouring forums and all we've been able to find is the EEC pin-out diagram.

Does anyone have the schematic or know where we can find one? Maybe someone has a picture of the connector showing the wiring configuration?

Any help is GREATLY appreciated!
1 - 1 of 5 Posts
PLEASE PLEASE PLEASE make sure that your pins from your main harness are in match with pins from O2 sensors harness. If you fail to do so , your computer will be toast right with car start.
Read this thread:
RPM Rising to 3K after Installing New O2 Sensors!!! Please Help - Mustang Forums at StangNet
1 - 1 of 5 Posts
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