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Thread: How do I connect Holley Digital Gauges to a Terminator ECU?

  1. #1
    Join Date
    May 2017
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    Grosse Ile Michigan
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    Question How do I connect Holley Digital Gauges to a Terminator ECU?

    I'm installing a dash in my boat. I want to use Holley digital gauges. How do I connect them to my ECU? I'm using a Terminator ECU running V4. I want to connect Oil Pressure, Air/Fuel Ratio & Fuel Pressure gauges. Any help would be greatly appreciated. Thank you in advance, Janet Law

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
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    Default

    Yes, you can use as many Digital or Analog EFI Gauges (LINK) as you'd like (1-wire daisy chain).
    The white/black wire on the gauge/module, connects directly to the ECU P1A connector - pin A15.
    J1A-A15 is the ECU's DGI-Tx (Data Gateway Interface-Telecommunication Transmission) connection wire.
    The gauge kit should be supplied with an ECU connector terminal (small round barrel terminal).
    The white/black wire doesn't connect to the I/O Harness, nor does it involve any ECU programming.
    The Holley EFI Analog Gauges require one analog Gauge Module (LINK) to connect to the ECU.
    http://documents.holley.com/199r10530rev2.pdf (Universal Gauge Instructions)
    http://documents.holley.com/199r10942.pdf (Analog Gauge Instructions)
    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
    Join Date
    May 2017
    Location
    Grosse Ile Michigan
    Posts
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    Default

    Thank you Danny very much. You helped me decide that I do not want the hassle of digital gauges. So I'm buying Holley EFI Analog Gauges. When selecting Air/Fuel gauges they offer a left & right gauge. Which one do I need?

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

    Default

    Quote Originally Posted by janetlaw View Post
    Thank you Danny very much. You helped me decide that I do not want the hassle of digital gauges. So I'm buying Holley EFI Analog Gauges.
    You're welcome. I don't see the digital gauges on the Holley website anymore anyway.

    When selecting Air/Fuel gauges they offer a left & right gauge. Which one do I need?
    The "right" is for the 2nd Dominator EFI dual WBO2 sensor applications.
    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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