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Cooling fan wire

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  • Cooling fan wire

    Ok, so I was letting Ol' red warm up today to check and make sure the altenator was working properly. The fan was not kicking on, so I thought I would test it by grounding the wire to the sensor. Well, as soon as I unplugged the sensor, the fan turned on. Is that normal? I thought that wire had to be grounded to turn the fan on? Any help is appreciated. Thanks
    The normal is not always normal... MOST is not ALL... And any job can be hard if you don't have the right tools!!!

    My Fleet:
    89 L 4spd (Daily Driver(if it isn't broke down)) "Spanky"

  • #2
    That this the correct functioning of the fan.
    '93 Blue 5spd 230K(down for clutch and overall maintanence)
    '93 White B6 swap thanks to Skeeters Keeper
    '92 Aqua parts Car
    '93 Turquoise 5spd 137K
    '90 White LX Thanks to FB71

    "Your God of repentance will not save you.
    Your holy ghost will not save you.
    Your God plutonium will not save you.
    In fact...
    ...You will not be saved!"

    Prince of Darkness -1987

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    • #3
      Thanks for the info. I was just thinking that it had to be grounded for some reason.
      The normal is not always normal... MOST is not ALL... And any job can be hard if you don't have the right tools!!!

      My Fleet:
      89 L 4spd (Daily Driver(if it isn't broke down)) "Spanky"

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      • #4
        Default is fan ON, safer that way.
        Original owner of silver grey carburetted 1989 Festiva. 105k km as of June 2006. 140k km as of June 2021.

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        • #5
          Originally posted by WmWatt View Post
          Default is fan ON, safer that way.
          I would agree on that thought... you never know when that darn switch might quit... Thanks
          The normal is not always normal... MOST is not ALL... And any job can be hard if you don't have the right tools!!!

          My Fleet:
          89 L 4spd (Daily Driver(if it isn't broke down)) "Spanky"

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          • #6
            The fan relay is active until the fan sensor reaches set point and switches the relay off...you can test the fan sensor by placing it in an oven at around 110deg celsius, it should go to open and close again when the temp drops (check it with a multi-meter)
            "all I ask is the chance to prove that money won't make me happy":simon:

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            • #7
              The "fan sensor" also has a weird name, i think it might be.... ummmm.... a thermostat

              When the engine heats up and the thermostat opens, it breaks the ground circuit which then causes the fan to kick on
              Last edited by Damkid; 11-02-2009, 08:47 PM.

              1988 323 Station Wagon - KLG4 swapped
              1988 323 GT - B6T Powered
              2008 Ford Escape - Rollover Survivor

              1990 Festiva - First Ever Completed KLZE swap (SOLD)

              If no one from the future stops you from doing it, how bad of a decision can it really be?

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