Mondial 8 -- Tach signal from Engine to Dash | FerrariChat
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Mondial 8 -- Tach signal from Engine to Dash

Discussion in 'Mondial' started by DanielGA, Jul 24, 2025 at 10:05 AM.

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  1. DanielGA

    DanielGA Karting

    Mar 19, 2018
    145
    Midwest
    Full Name:
    Daniel A.
    #1 DanielGA, Jul 24, 2025 at 10:05 AM
    All,

    I am doing an EFI conversion for my '82 Mondial 8: AEM ECU, coil on plug, EFI, etc.

    Needless to say, the original ECU boxes are removed as well as distributor.

    I am trying to connect things up to the dash.

    Does anyone know where/which wire reaches the tachometer?

    The 9-pin and 15-pin connectors near the former coils drive many things but not the tachometer.

    I have searched around and found mentioning of a "brown with black stripe wire" somewhere, but its totally vague. Did the tach signal leave the Digiplex ECU (so its one of the wires in the Digiplex connector?)
     
  2. Paulmendit

    Paulmendit Rookie

    Feb 26, 2024
    38
    Full Name:
    Paul Coles
    #2 Paulmendit, Jul 25, 2025 at 10:15 AM
    On my QV, there is a brown / black wire that runs from the 11 way connector block on the Digiplex box, disappears into a wiring loom which then runs from the engine bay along the left hand side of the car into the dashboard where it eventually ends up in one the multiplugs behind the clocks before going to the tacho.

    It was pin 10 of the Digiplex and it is only fitted to one of the ECU's - the other is left empty.
     
    Steve Magnusson likes this.
  3. 85QVEuro

    85QVEuro Formula Junior

    Jan 15, 2021
    546
    NYC
    Full Name:
    Joe
    #3 85QVEuro, Jul 25, 2025 at 1:41 PM
    I think this is what you are looking for...Contact Afterburner here on FC and get his wiring diagrams - you'll save a lot of headaches...Hope this helps

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