Fan won't stop spinning help!!!!

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Trayn8387, May 3, 2016.

  1. pup

    pup Light Load Member

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    Dec 3, 2011
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    What engine does the truck have?
     
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  3. Trayn8387

    Trayn8387 Bobtail Member

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    Jan 21, 2013
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  4. pup

    pup Light Load Member

    252
    256
    Dec 3, 2011
    n.h.
    0
    the ecm could be commanding the fan on due to inputs from the ac system, intake temp, & coolant temp. You will need to connect a scan tool to the engine to see if the fan is being commanded on. A sensor could fail in range & not cause a check engine light. If the ecm says it should be off check the wire between the ecm & solenoid for damage.
     
  5. Trayn8387

    Trayn8387 Bobtail Member

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    Jan 21, 2013
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    Ok I ll check the wires from the ecm to the sensors thanks
     
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