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Thread: Fan setup?

  1. #1

    Default Fan setup?

    I have my fan setup from a little temp box that has a probe and I turn the dial a what temp I want it to come on at, but I want my Sniper to turn it on. On the temp box from my relay, is #86 goes to switch then output is grounded, so I hooked #1 fan wire to #86 on relay, but fan won't turn on unless I flick my manual switch which is on #86 then grounded on other side. I have temp set at 180° on and 170° off just to get it setup for now. Pic of switch and how relay is:
    https://photos.app.goo.gl/Mcdoq9bHM38FKO6x1
    https://photos.app.goo.gl/CuLyd6MLVrFs8O0K3

  2. #2
    Join Date
    Dec 2009
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    Connecticut
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    Default

    The Sniper EFI electric fan ground wires (pin C, light blue - Fan #1 & pin D, light green - Fan #2) trigger the relay coil − (terminal #85). Yes, terminal #85/Ground is the industry standard for good quality relays, with or without a diode. Sniper EFI instruction manual: LINK - page 17 & 50.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

    Default

    OK, did more Googling and found this setup from Holley. I think this is what I need, the first relay setup?
    Quote Originally Posted by Danny Cabral
    https://forums.holley.com/showthread...Fan-Holley-EFI (Wiring an Electric Cooling Fan - Holley EFI)

    Electric Fan #1/#2 relay terminals (ECU ground signal scenario):
    #85 - Ground signal from ECU Output.
    #86 - Fused +12V power to relay coil.
    #30 - Fused +12V power to relay contact.
    #87 - +12V power to electric fan.
    #87A - Not used in this application.
    Terminals #30 & #87 can be reversed.
    http://www.autoshop101.com/forms/hweb2.pdf (Understanding Relays)

    Electric Fan #1/#2 relay terminals (ECU +12V signal scenario):
    #85 - Ground to relay coil.
    #86 - +12V signal from ECU Output.
    #30 - Fused +12V power to relay contact.
    #87 - +12V power to electric fan.
    #87A - Not used in this application.
    Terminals #30 & #87 can be reversed.
    http://www.autoshop101.com/forms/hweb2.pdf (Understanding Relays)

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
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    Default

    Quote Originally Posted by 383cj View Post
    OK, did more Googling and found this setup from Holley. I think this is what I need, the first relay setup?
    Yes, as I stated in post #2.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5

    Default

    Thanks Danny. I needed to see a pic to figure it out, and it seems to work now from the small test I tried. Thanks.

  6. #6
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    18,637

    Default

    You're welcome.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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