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Thread: Holley Stand-Alone Digital Dash I/O Questions

  1. #1

    Default Holley Stand-Alone Digital Dash I/O Questions

    I have the Holley 553-109 stand-alone Digital Dash installed in my LS swap car with a T-56. I know there are I/O that can be switched through the Digital Dash, but can they be switched through other inputs? For example, I want to have the fans turn on when the engine reaches 205°F and off at 195°F. Can I program this somehow? Also was wanting to use a ground output to activate the reverse lockout switch when the vehicle is reading under 2 MPH. Is this something that can be done through the GPS input?

  2. #2
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    Quote Originally Posted by 217_Firebird View Post
    For example, I want to have the fans turn on when the engine reaches 205°F and off at 195°F. Can I program this somehow?
    No, the Digital Dash doesn't have the "Hysteresis Mode" to turn it on, then back off at a lower temperature.
    http://documents.holley.com/199r10954rev2.pdf (Holley 558-432 Digital Dash I/O Adapter Instructions)
    http://documents.holley.com/199r11021.pdf (Holley 553-109 Stand-Alone Digital Dash Instructions)
    http://documents.holley.com/199r10746rev1.pdf (Holley EFI 553-106 Digital Dash Instructions)

    Also was wanting to use a ground output to activate the reverse lockout switch when the vehicle is reading under 2 MPH.
    It does have an "SSR Out 2 amp ground output suitable for use in triggering relays", but I think it's just for the Virtual Switch panel use.
    The instruction manual states, "SSR Out: These outputs can be controlled by placing a ‘Switch’ type on one of the screen layouts.
    Note: For more detailed instructions on how to customize gauges & screens, please refer to the instruction manual provided with the 553-106 Digital Dash."
    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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    I appreciate the help sir. I've read all manuals that came with it looking for answers. The user manual is pretty poor. DEFINATELY could contain more info and help with setup, wiring options, etc. Thank you again for the info!

  4. #4

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    Quote Originally Posted by Danny Cabral View Post
    No, the Digital Dash doesn't have the "Hysteresis Mode" to turn it on, then back off at a lower temperature.
    http://documents.holley.com/199r10954rev2.pdf (Holley 558-432 Digital Dash I/O Adapter Instructions)
    http://documents.holley.com/199r11021.pdf (Holley 553-109 Stand-Alone Digital Dash Instructions)
    http://documents.holley.com/199r10746rev1.pdf (Holley EFI 553-106 Digital Dash Instructions)


    It does have an "SSR Out 2 amp ground output suitable for use in triggering relays", but I think it's just for the Virtual Switch panel use.
    The instruction manual states, "SSR Out: These outputs can be controlled by placing a ‘Switch’ type on one of the screen layouts.
    Note: For more detailed instructions on how to customize gauges & screens, please refer to the instruction manual provided with the 553-106 Digital Dash."

    Another issue. Just today the Digital Dash is not reading voltage. Is there any way I can diagnose this? I assume the Digital Dash reads the voltage of the main power supply wire?
    Last edited by 217_Firebird; 04-16-2018 at 12:23 PM.

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