Can't find the Self Test Input (STI) wire

[ovysimac]

Hello all,

Need your help in finding the STI wire on my 93 M8 base, stock (Gen 1). I developed a CEL and need to scan for trouble codes. I need to go the old school route and use the CEL or a voltmeter/test light to scan for stored code(s). In order to do so I need to short this STI to pin 2 of the self-test connector (STC).

Problem is I can't find this one-wire STI (I'm told that it is white and has a connector resembling the telephone connector). I looked high and low, to no avail.
Questions:
1. Does the 1993 Mark 8 have this STI white wire?
2. If yes, where in the world is it located? A pic would help.
3. Is this STI wire needed (besides the STC) when usind an OBD-I scanner?
Thanks for your help.

 

[tonybrooklyn]

https://www.youtube.com/watch?v=nl2lqqS7vvE

https://www.youtube.com/watch?v=A8TWkMCUV1A

 

[ovysimac]

Thanks. My problem is that when taking off the SDC TEST cover, there's no additional one-wire STI test cable; only the trapezoidal 6-wire test port.
https://www.dropbox.com/s/c7tm216paszmzvl/20171119_095818.jpg?dl=0

Where it may be? I did not remove it... Does anyone know /run into this predicament before? Do I need this one-wire STI cable if I buy a commercial scanner (as opposed to using a paper clip and the CEL)?
Thanks.

 

[ovysimac]

Looked under the wide black cover to expose all the wires leading to this SDC TEST port but couldn't find this STI wire, nor any sign that it was cut/removed...

 

[driller]

Looked under the wide black cover to expose all the wires leading to this SDC TEST port but couldn't find this STI wire, nor any sign that it was cut/removed...

Are you sure you’re not confusing it with the suspension test port?

It’s been a long time since my ‘93 was EEC-IV, but I remember it being under the shock tower cover on the drivers side? The test port for the suspension is on the passenger side.

 

[BlackIceLSC]

JP is referring to this one:

 

[ovysimac]

That's EXACTLY where it was! Thanks for pointing that out to me.
Best wishes!

- - - Updated - - -

Thank you.

 

[BlackIceLSC]

You're quite welcome. For years I would take some of my random photos and draw/label them and save them....I always hoped some day they'd become useful. Now some 14 years later, they still are.