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

ovysimac

Registered
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.
 
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