I don't think my obd1 is working. My check engine light is on so I tried to jump it but it doesn't flash. What can I do about that? 1985 delta 88. Thanks

 

key on, engine off, with jumper wire attached and it did not flash out a 1-2 sequence 3 times?

 

I used a paper clip but nope. Nothing

 

Go to an auto parts store to see if they have a scan tool that is compatible with the early GM connector. They generally read codes for free.

 

They don't do it for the early GM'S:/

 

Do you have any factory manuals referring to your model? You might want to get some to help understand this system. Old school tuning and understanding of engines will be a plus. This era still responds to all those principles, like vacuum and timing.

Many people have bypassed all these early computer controlled components through the years. Some others simply put a piece of black tape over the light...and called it good.

How is you engine running?

 

The carbureted cars used a driver module for the check engine light since the engine could run without the computer. It was designed to turn the lamp on if the ECM was unplugged, unpowered or otherwise inoperative. Here is one of the procedures to diagnose the symptom you describe that might help.

 

Thanks man! I think this might help! Can I ask what kind of book that is?

 

That is from a GM training manual I received in a Delco Tech class I took back then.

 

Man. That's a neat book to have. that's pretty handy!