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Thread: E-fan wiring?

  1. #1
    Join Date
    Aug 2011
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    Ellsworth Air Force Base, SD
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    E-fan wiring?

    I have the factory 05' Silverado dual fans installed on my truck, are these fans single or dual speed fans? I am not sure whether I need to wire them with a 2 or 3 relay setup.
    1994 Chevy C1500 RCSB 05' DBW 5.3 Conversion Complete
    My build

    Coming soon ....... Full Repaint, 214/220 Cam, Yukon Posi with 3.73's, remove body lift

  2. #2
    Join Date
    Mar 2013
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    how many wires coming out of each? if 2, then they are single speed and need 3 relay setup. if 3 wires, then they are dual and only need 2 relays.
    Like Tumbler in "Gone in 60" I'll drive anything with wheels or without

    My 95 ECSB LQ9 build thread - http://www.ls1truck.com/forums/lsx-t...to-95-obs.html
    CALI LEGAL ENGINE SWAP!
    Stock 03 LQ9, DBW, 95' 4l80e w/ Transgo shift kit, 2010 50# GM injectors, 2800 Circle D stall, Spectre CAI, Upgraded trans cooler, Home-made E-fans/shroud, Dual EP-381 fuel pumps w/Home-made hotwire kit
    NEXT ON LIST: Dual Battery setup, CAM/Valvetrain upgrade, Build my own rear mount turbo, TRU-TRAC, HIT THE STRIP!!!

  3. #3
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    Those fans have a one speed motor.

  4. #4
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    So this is how Brendan from Lt1swap.com told me to wire the fans.



    Is this the proper way to wire these fans because that's how I wired them?
    1994 Chevy C1500 RCSB 05' DBW 5.3 Conversion Complete
    My build

    Coming soon ....... Full Repaint, 214/220 Cam, Yukon Posi with 3.73's, remove body lift

  5. #5
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    Mar 2013
    Location
    Long Beach California
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    637
    yep. thats the same guide i used. works great. assuming your pcm is programmed to turn them on....
    Like Tumbler in "Gone in 60" I'll drive anything with wheels or without

    My 95 ECSB LQ9 build thread - http://www.ls1truck.com/forums/lsx-t...to-95-obs.html
    CALI LEGAL ENGINE SWAP!
    Stock 03 LQ9, DBW, 95' 4l80e w/ Transgo shift kit, 2010 50# GM injectors, 2800 Circle D stall, Spectre CAI, Upgraded trans cooler, Home-made E-fans/shroud, Dual EP-381 fuel pumps w/Home-made hotwire kit
    NEXT ON LIST: Dual Battery setup, CAM/Valvetrain upgrade, Build my own rear mount turbo, TRU-TRAC, HIT THE STRIP!!!

  6. #6
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    Aug 2011
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    Ellsworth Air Force Base, SD
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    That's what I asked for, the donor vehicle for the engine and PCM had dual fans on it. I will have to wait till Monday to test it, my tracking number shows my computer gets delivered back to me then.
    1994 Chevy C1500 RCSB 05' DBW 5.3 Conversion Complete
    My build

    Coming soon ....... Full Repaint, 214/220 Cam, Yukon Posi with 3.73's, remove body lift

  7. #7
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    Ya, that's an oem wiring schematic, works great.

    regardless of pcm, you'll be able to use both fans and have them function correctly. programming takes care of that.

  8. #8
    Join Date
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    4,033
    ^^^ MAKES A DAMN GOOD HARNESS TO SOLVE ANY ISSUES ALSO ^^^

    still running one of the first ones ever made
    Simple: 408 on steroids!
    single digits coming soon!

  9. #9
    Join Date
    Aug 2011
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    Ellsworth Air Force Base, SD
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    Have to wait till tomorrow to test it, my computer did not show up in the mail even though the tracking number said today. My original plan was to buy one from Nelson, but my wife dug into my budget a little. I am putting the Nelson's fan harness on my summer upgrades list with a cam, stall, Nelson tune, and full repaint.
    Last edited by Bear; 03-10-2014 at 06:37 PM.
    1994 Chevy C1500 RCSB 05' DBW 5.3 Conversion Complete
    My build

    Coming soon ....... Full Repaint, 214/220 Cam, Yukon Posi with 3.73's, remove body lift

  10. #10
    Can someone repost that wiring diagram. Or link it the one posted said it's been deleted

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