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Thread: Allen, do the Efans with your harness have a low and high setting??

  1. #1
    Join Date
    Oct 2003
    Location
    LaPorte TX
    Posts
    835
    like the title says was wondering if the harness has a low, and high setting for the fans???
    mine seem to not be running very fast, and I am a little concerned about it..
    Thanks
    Daniel

    1999 Pewter Z28
    Sold - 2001 Onyx Black Silverado Stepside "Thunder"

  2. #2
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    <div class='quotetop'>QUOTE(01Thunder &#064; Jul 28 2006, 10&#58;44 AM) [snapback]59274[/snapback]</div>
    like the title says was wondering if the harness has a low, and high setting for the fans???
    mine seem to not be running very fast, and I am a little concerned about it..
    Thanks
    Daniel
    [/b]
    First of all, where in the hell have you been, LOL, jk, glad to see you made it to the site.

    They kind of do.

    a/c on: 1 fan high
    pcm on: 2 fans low
    a/c on-pcmon: 2 fans high

    If you want manual control, run a toggle to the blue pcm wire and ground it on the other side, this will make both fans turn on low.

    allen

  3. #3
    Join Date
    Oct 2003
    Location
    LaPorte TX
    Posts
    835
    Oh I&#39;ve been lurking alot lately..
    dont have much to post, but I do frequent the site often...
    I will try harder to post something..


    thanks for the answer
    But, is there anyway I can bypass the AC/on PCM/on and have the fans run high without the ac on. ???

    1999 Pewter Z28
    Sold - 2001 Onyx Black Silverado Stepside "Thunder"

  4. #4
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    If you jumper across the blue and green wires from the PCM, you get high fans any time the fans turn on.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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