Hi fellow stang lovers, Im new to this whole forum thing and trying my best to navigate through site. Hope in in the correct area for my issue. So I've been having some nightmarish issues with my wiring for a few weeks now and I'm counting more grey hairs on my head every day trying to figure this out on my own and would greatly appreciate some guidance with my crisis. Ok so I've got an 89 gt with unaltered wiring harness, and I believe Ive narrowed it down to wiring in the steering collumn by accident. Whats happening is when I try to pull codes with koeo from the self test connector(while engine is having idle issues) I have no problem doing that. My test light is green when probed to the check enging light wire, and gator clip connected to positive lead on battery, and off we go with codes. Well all of the sudden after having only tinkered with my guage cluster and surrounding trim around steering collumn, my car runs and sounds perfect. The only problem is that now I am unable to pull codes using exact technique as before. As soon as I turn key my green light goes out and needless to say again, but no codes. Could I have a bad printed circuit board on guage cluster? If anyone can take this info and point me in the right direction(wires to inspect first), I would be happier than an oppossum eating s**t on a frosty morning. Im not exactly a wiring troubleshooting fan but I'm learning against my will. So any help that may prevent me from spending days tracking down what is probably a simple fix, would work for me. I can give more info if needed, but figured I would start here. Thanks in advance.