RedHot85Vette Posted April 23, 2018 Report Share Posted April 23, 2018 Good Day! I hope you're enjoying a pleasant one. It's been a while since I've visited this site. I have a '90 Lumina Coupe, and a 91 Sunbird Convertible, both with the 3.1 V6 (both now on the project pending list). I thought I saw a couple of articles here, from long ago, that might come in handy now. One was a wiring diagram to install an under dash switch to bypass the computer for turning on the cooling fan manually. Another article gave instructions for resetting the computer after disconnecting the battery. I looked in the FAQ section but had no luck. Are they here somewhere, moved, hidden? Does anybody know what I'm talking about and can maybe point me in the right direction? Respectfully, John V. Brennan Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 23, 2018 Report Share Posted April 23, 2018 I can post a simple drawing to enable the fan tonight without throwing codes. As for resetting the PCM, your cars are early passkey if any at all. Leaving the PCM unplugged for 10 minutes will clear any codes. Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 24, 2018 Report Share Posted April 24, 2018 Quote Link to comment Share on other sites More sharing options...
mfewtrail Posted April 24, 2018 Report Share Posted April 24, 2018 The old articles can be found here: http://w-body.com/oldsite/ 89-W-Body-Regal and rich_e777 2 Quote Link to comment Share on other sites More sharing options...
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