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Thread: Fan Speed 3 Not Working

  1. #11
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

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    Someday I need to look into replacing that resistor with a PWM circuit. My new Toyota has a lot of fan speeds so I guess it has PWM.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  2. #12
    Senior Member DMC-81's Avatar
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    Quote Originally Posted by Bitsyncmaster View Post
    Someday I need to look into replacing that resistor with a PWM circuit. My new Toyota has a lot of fan speeds so I guess it has PWM.
    After needing to ask my friend Google what PWM means, I think this would be great.

    For other readers: "PWM = Pulse-Width Modulation. A modern duty cycle control allowing fans and pumps to perform on demand. Unlike voltage control PWM control actually lowers power draw."

    You are an electrical wizard Dave!
    Dana

    1981 DeLorean DMC-12 (5 Speed, Gas Flap, Black Interior, Windshield Antenna, Dark Gray)
    Restored as "mostly correct, but with flaws corrected". Pictures and comments of my restoration are in the albums section on my profile.
    2006 Dodge Magnum R/T (D/D)
    2010 Camaro SS (Transformers Edition)

  3. #13
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    7,229

    My VIN:    03572

    Quote Originally Posted by DMC-81 View Post
    After needing to ask my friend Google what PWM means, I think this would be great.

    For other readers: "PWM = Pulse-Width Modulation. A modern duty cycle control allowing fans and pumps to perform on demand. Unlike voltage control PWM control actually lowers power draw."

    You are an electrical wizard Dave!
    Yes PWM turns power on and off fully so there is no heat generated. A resistor or analog design produce a lot of heat.
    Dave M vin 03572
    http://dm-eng.weebly.com/

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