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Thread: CAN Hook Up

  1. #1

    Default CAN Hook Up

    So If I'm using a Racepak IQ3 Dash and the Holley 6.86" Pro Dash in my vehicle, can I just use the existing CAN plug on the LS1 Dominator harness and daisy chain them both. Or do I need to use the 558-412 CAN kit and take those pins out and populate the correct J3 plug inputs for one and the LS1 harness CAN plug for the other? Thanks in advance for the input.

  2. #2


    You'll need to use both CAN networks. In the software, you'll need to set one to Holley and one to Racepak. You can daisy chain multiple Holley can items on 1 network, but the Racepak stuff uses a different protocol.

  3. #3


    Great, thank you for the info.

  4. #4
    Join Date
    Dec 2009


    There are two CAN Bus #1 & #2 Types in Basic I/O (System ICF). One will be set to "Holley Standard", and the other "Racepak". Change the appropriate protocol channels to "Holley Standard" & "Racepak".
    CAN Bus 1 Type: ECU pins J1-A32 (High) & J1-A24 (Low).
    CAN Bus 2 Type: ECU pins J3-B20 (High) & J3-B14 (Low). (Holley EFI Wiring Manual - Pages 6 & 8)
    May God's grace bless you in the Lord Jesus Christ.
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