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Thread: Dual Cooling Fans Question

  1. #1

    Default Dual Cooling Fans Question

    Is it possible to run the Output #1 wire light blue with the Output #2 wire light green into the the same relay ground? I have dual relays for the fans, and would like both fans to come on at same time. My wiring harness came from American Autowire with the dual relays for the fans.

  2. #2


    Not sure how your relays are wired, but I have dual fans & two relays. I'm using just the single light blue wire to trigger both of them.

  3. #3


    Does it matter if it's the light blue wire or light green wire to trigger both. Thanks for the info.

  4. #4
    Join Date
    Dec 2009


    Light blue is Fan #1 (Output #1), might as well use that one (LINK - page 17 & 50). They operate in numerical succession.
    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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