Anyone figure out how to jump the cooling fans

Discussion in 'SRT Hellcat Performance' started by paul suloff, Aug 4, 2015.

  1. paul suloff

    paul suloff Silver Member

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    Want to run them with engine off to cool at the track.
    Old cars could do it by jumping the fuse with some alligator clips. Terminals are different in 15s.
     
  2. B5 Blue

    B5 Blue Platinum Member

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    Nope:mad: Pulse width signal from ECM
     
  3. paul suloff

    paul suloff Silver Member

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    Would think you could find the power supply at the plug for the fans and jump it from the hot terminal and ground under the hood?
     
  4. B5 Blue

    B5 Blue Platinum Member

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    The cooling fan is a module already has constant power and ground, the third wire is from ECM and is a pulse width signal sent to fan module (fan) no way to jump anything like 2014 on down
     
  5. Nycsrt

    Nycsrt BANNED

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    It my mistake of information you can turn it on hp scanner not suite (scanner)or start wit this wire diagram
     

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  6. Racist Cat

    Racist Cat Gold Member

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    Bump.

    On our dodges we used to put a switchable resistor in the water temp signal to trick the truck into 240* water temp, high idle, and full fan would ensue.

    Might be able to leave the ignition on, and trick the car into thinking high water temp? I know some cars will run the fans engine off if excessive water temps.

    A thought.....
     
  7. clickr

    clickr Silver Member

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    what ever you do, might want to unplug the fan first so you don't feed any current back upstream to the computer. Might have to make a jumper wire set and power it from an aux. battery. Then when you are ready, unplug and replug into the original wire connector.
     
  8. dragrcr

    dragrcr Gold Member

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    Could turn your PCM into a Samsung Note 7

    . 160902121639-samsung-galaxy-note-7-fire-front-780x439.jpg
     
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  9. yellaheep

    yellaheep Silver Member

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    With the car not running, and fans on, all you're cooling is the fluid in the radiator...... why not let it idle with the A/C on? The A/C being on triggers the fans to run and at idle, the water pump will be circulating coolant through the engine.

    If you want it cooler than idle temp, maybe get a large cage fan and have it blowing into the lower grille to hopefully get air through the radiator and around the block to cool it?

    [​IMG]
     
  10. Mike Comp T/A #57

    Mike Comp T/A #57 Gold Member

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    You have to start the car ever so often to let the water circulate.
     

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