This popped up in my visitor messages. I am going to resurrect the thread with this post, as it is the same issue with the same car.
A few months ago, I had an issue with my Alero'* engine not shutting off. I don't know if I should start a new thread, but since you were really helpful I'd like to know if I could pick your brain.
In the post, you asked if the fans are running, key goes off, does the car shut off when the fans kick off? The car doesn't shut off. I wonder if it'* a diode somewhere on the cooling fan circuits, since that'* the relay that I have to pull to cut the car off.
I appreciate any help you can give me! Thanks
It sounds like we need to pull out wiring diagrams, and dive in to this one.
This one is beyond my scope in all honesty, I just asked the question to get a better understanding of the issue so that we could all get on the same page.
I agree with jwfirebird however, it sounds like something from the fan circuit is backfeeding the ignition circuit. I still don't know where to start though. Sorry