trying to interface with my computer via ALDL comm link.didnt work so i stuck my gm diagnostic key in there and the check engine light never flashed like it used to. Checked for voltage and that checks out to be fine. anybody had this problem before? TIA

The problem will be in between the light, and the aldl port, or between the port and the computer, unless it draws its voltage from the computer. You are missing a connection. You need to check for voltage at the light socket first, with the diagnostic key plugged in. If you have power, replace the bulb. If you don't have power, check the wiring for damage, or loose grounds.

Let us know when you find it so we can give you a proper send-off-

no ground problems all the voltage is coming through acording to spec, but the diagnostic mode is not happening.

I would have thought, one of the "techs", you work/worked with, would have "bailed you out" by now.

Norm

Then the problem is from the port to the light.

It cant be all ok, and not work. If it won't go into diagnostic mode, then something is not right.

Im thinking more like my PCM is going bad.Either way the light would not keep it from going to diagnostic mode... it something else i just can figure it out yet

Isn't the light what turns on to give OBD1 codes? Try doing it manually, with a paper clip-



Full thread can be seen here

If it won't do it manually, then you know you have either a bad connection, or a bad ECM.

ECM is more like it the light is what displays visual codes but my laptop cant connect to the ECM nor will my autotap acanner I got another ECM from the j-yard but it was already fried, so i have to find another 91' or go for a 99' is what i have on mind now at least they have knock sensor inputs and heated oxygen sensor inputs and then i can have HP tuners to play with

If you can get codes out of it with the paper clip, then the scanner isn't working right, and neither is the cable/computer.

If it doesn't work, then you know you need a new ECM.

So, when should we plan your going away party?

I mean damn could you repeat what i already said even more? you havent told me anything i didnt know already so....I dont see going away anytime soon.

If you know it all, then why ask? You never said you tried to do it manually. My suggestion empirically eliminates both your scan key and your computer, and will tell you if it will work, by flashing the MIL.

If you think you know where to go with it, then do it- then go away.

I could give a shit if you ever get it fixed.

i needed that laugh andrew thanks for all your "experience" and "advice"
on this situation

Only posting what one might call, "a taste of your own medicine".