Electrical No test connector jumper wire?

Discussion in 'Fox 5.0 Mustang Tech' started by madspeed, Apr 3, 2013.


  1. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    Just finished a wire tuck on my 89 and noticed I do not have the single wire jumper that is used to check diagnostic codes. Is it not existant on an 89?
  2. mikestang63

    mikestang63 Mustang Master

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    nope. the grey connector should be- right by the diagnostic plug. You did to good a job of tucking my friend.


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  3. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    funny but i swear i didnt tuck that one LOL
  4. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    jrichkter, you've got a wiring diagram I can trace these wires with to find this thing?
  5. jrichker

    jrichker StangNet's favorite TOOL SN Certified Technician Founding Member

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    He's correct. It would be very easy to cover it up.
    If you look very carefully, you can see the gray connector peeking around the upper LH side of the test connector: the wire is very short.
    [​IMG]

    [​IMG]

    The STI has a gray connector shell and a white/red wire. It comes from the same bundle of wires as the self test connector.


    WARNING!!! There is a single dark brown connector with a black/orange wire. It is the 12 volt power to the under the hood light. Do not jumper it to the computer test connector. If you do, you will damage the computer.
  6. madspeed

    madspeed Colonel Mustard Mod Dude Founding Member

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    no its definitely not there

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