01 Grand AM GT Cooling Fan Override

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=17839
Printed Date: July 20, 2025 at 7:50 PM

Topic: 01 Grand AM GT Cooling Fan Override

Posted By: dxtreme_85
Subject: 01 Grand AM GT Cooling Fan Override
Date Posted: August 20, 2003 at 12:17 AM

Basically what I want to do is put a switch in my passenger compartment that will allow me to turn my two cooling fans on in my car for when I am in the staging lanes at the racetrack. Casper's Electronics makes a plug and play unit that I can get for 80 bux that consists of 3 relays, a switch, an LED, and all that crap... but I don't want to spend 80 bux for something I might be able to make myself. What I'm looking for is the wiring diagram for either my 01 GAGT 3.4L's cooling fans, or the diagram for the casper's unit. Plus anybodies insight on how to accoplish this. I know how diodes and relays work, but I need somebody elses input. thanks

Replies:

Posted By: xetmes
Date Posted: August 20, 2003 at 5:15 AM

i dont see how it can be that difficult, do you have a shop manual for it?

Posted By: dxtreme_85
Date Posted: August 20, 2003 at 8:47 PM

well the thing is...the casper's uses three relays and I don't know why. I would think just find the wire that needs to be hot and use a relay to make it hot when I need it to be...Problem solved. I have the diagram for the 99+GA 3.4L engine's cooling fan system, but it is pretty dificult for me anyways.

Posted By: EvernhamMS
Date Posted: August 21, 2003 at 10:40 AM

There should be some sort of temp sensor that is used to turn on the fanswhen the coolant exceeds a pre-determined temp when the engine is off(soak back). It probably has a single wire running to it - you should be ableto tap into that with a switch and run the other side to ground. This shouldgive you the override operation that you are looking for.