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Thread: cooling fans

  1. #1

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    cooling fans

    does anybody know the best way to put in A toggle switch to run your cooling fans i remember reading somewhere how to do it using the relay port if some one can explain it would be greatly appreciated

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    Guy Incognito WhatTheFehl's Avatar
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    First of all... does your state have emissions testing? Because if you do a manual override for your cooling fans it WILL NOT pass emissions...
    Mike F

    1999 Pontiac Grand Prix GTP - 196,000 miles, SD headers, FWI, Toy/Money Pit
    . Car of the Quarter 2nd quarter 2013
    2004 Subaru Outback Wagon - 140,000 miles, 2.5 H4 EJ251, Tsudo headers, HID fogs, DD

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    gpchris's Avatar
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    Quote Originally Posted by 95GPSE View Post
    First of all... does your state have emissions testing? Because if you do a manual override for your cooling fans it WILL NOT pass emissions...
    Explain???



    heres the diagram
    2009 Pontiac G8 GT 6.0/A6

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    Guy Incognito WhatTheFehl's Avatar
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    If you leave the switch on, the fans will run constantly and the vehicle most likely will never get up to operating temperature for the emissions testing. That is a fail right there. If you leave the switch off, the fans won't run, causing your car to overheat. Either way it will fail emissions. At least that's the way I understand it. The inspection mechanic isn't going to sit there and flip cooling fan switches for you.
    Mike F

    1999 Pontiac Grand Prix GTP - 196,000 miles, SD headers, FWI, Toy/Money Pit
    . Car of the Quarter 2nd quarter 2013
    2004 Subaru Outback Wagon - 140,000 miles, 2.5 H4 EJ251, Tsudo headers, HID fogs, DD

  5. #5
    gpchris's Avatar
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    Actually you have it wrong. The fans operate normally when the switch is off. The switch just allows you to override the pcm and turn the fans on at any temperature.
    2009 Pontiac G8 GT 6.0/A6

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