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2G Wiring both fans to run together

Posted by Kai Hefner, Apr 11, 2019

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  1. Kai Hefner

    Kai Hefner Proven Member

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    To preface this question, I will likely be deleting my AC soon. Blah blah comfortable driving whatever; I'll drive fast and roll the windows down.

    For clearance issues with a new radiator, I was looking to keep one fan pulling, and one fan pushing. Are there any problems with wiring these two fans to turn on together? Was thinking of maybe putting in seperate switches in the cabin for each fan but is there an issue with cooling the car too much?
     

    Street Build 279  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

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    1998 Eagle Talon TSi AWD
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  2. DSMPT

    DSMPT Proven Member

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    This is what I do.
    Assuming the OP's car is 2g, not 1g.
    Use a short wire and make the two terminals connected on the fan relays between the green circles in the attached pics. With this way, the A/C fan will automatically be triggered via the factory a/c fan relay when the radiator fan gets turned on by ecu (no need to turn on the A/C). And you can install a switch between the two red circles if you don't need the A/C fan always.

    DSC_0933.JPG
    DSC_0932.JPG
    DSC_0931.JPG
     

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    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

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    1998 Mitsubishi Eclipse GSX
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  3. Kai Hefner

    Kai Hefner Proven Member

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    I like that wiring, I might try that, thank you for the responses.

    I should probably clarify my question, both fans will have their own wires. I was thinking of wiring them independently to two switches in the cabin (one for each fan). Is there any problem with having both fans on at all times? Can my car be cooled too much?
     

    Street Build 279  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

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    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  4. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    You can run both at the same time, I have to myself. I run the pusher with the A/C button and its relay and run my puller on the stock 1g setup also. I used to have a 3rd fan and it had a separate switch/relay. Got too crowded so took it out and went with 2 big Spal fans. I would suggest a good fan, not the cheap Ebay fans that "claim" to move "X" amount of air but really don't.
     

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  5. Kai Hefner

    Kai Hefner Proven Member

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    Calgary, AB, Canada
    Yeah I will be switching to SPAL soon enough, have these Mishimoto slim fans that came with the car. I thought they were ebay special fans at first but god damn it seems like they move air. Sounds like a fighter jet when I'm parked and have the fans on.
    Regardless, you answered my question, can't really have too much cooling LOL
     

    Street Build 279  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 509  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  6. Vegas smith

    Vegas smith Proven Member

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    You can turn the fans on at any temp, rpm, boost etc that you like if you have ecmlink. I wouldn't run them all the time because you're just needlessly putting wear and tear on the fans.
     

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  7. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Never.
     

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  8. Detail

    Detail Supporting VIP

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    How do you actually do this? I can't see anything except the coolant offset option.
     

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    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

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    1995 Eagle Talon TSi AWD
    14.000 @ 109.000 · 2G DSM
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