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Thread: Holley 12-912 Wiring

  1. #1

    Default Holley 12-912 Wiring

    Installing a 12-912 in a new installation. There's a small male spade lug and a large one. Is the large power and the small ground?
    1981 Jeep Cherokee FSJ

  2. #2
    Join Date
    Dec 2009
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    Connecticut
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    I'm not familiar with this pump. Doesn't the harness connector (red & black wires) only fit one way? Anyway, yes, the large spade terminal is usually +12V power.
    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

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    It came with no wiring. And I'm using on a retrofit installation where this pump was not original to this vehicle. I really tried to find tech data before I asked the question.
    1981 Jeep Cherokee FSJ

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    19,283

    Default

    Quote Originally Posted by az chip View Post
    I really tried to find tech data before I asked the question.
    I understand.

    It came with no wiring.
    The Holley 12-912 picture illustrates the red wire as positive +12V & the black wire as Ground. So use that reference for orientation.

    And I'm using on a retrofit installation where this pump was not original to this vehicle.
    I realize that, but you should still use the mating harness connector. I think it's supposed to include the pigtail harness (LINK), or at least the connector.
    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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