Ignition ON Switch in engine bay (for EFI installation) | FerrariChat

Ignition ON Switch in engine bay (for EFI installation)

Discussion in '308/328' started by DanielGA, Aug 14, 2020.

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  1. DanielGA

    DanielGA Karting

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    Hello,

    I have a Mondial 8, which has the 2v 308 engine, and I am installing EFI and full aftermarket ECU (AEM brand). Anybody know of a convenient source in the stock engine bay to get "ignition on". I see that to solenoid of the starter I get the "ignition start" signal, but what I am searching for is the ignition on ... I have some electric wiring diagrams but cannot decipher where in the engine bay is such a signal ... I'd rather not have to run a wire all the way to the ignition switch in the cockpit...

    Any suggestions?
     
    DanielGA, Aug 14, 2020
    #1
  2. Crowndog

    Crowndog F1 Veteran

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    I think the fuel pump goes on at ignition on and if so might be used as an ignition on signal?
     
    Crowndog, Aug 15, 2020
    #2
  3. thorn

    thorn F1 Rookie Silver Subscribed

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    Don't know anything about the Mondial 8. But I'm almost positive that you're going to get an ignition source at the harness that feeds the stock digiplex.
     
    thorn, Aug 15, 2020
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  4. Crowndog

    Crowndog F1 Veteran

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    I was thinking the same but don’t know on that car where the box is located.
     
    Crowndog, Aug 15, 2020
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  5. Ferraridoc

    Ferraridoc F1 World Champ Owner Silver Subscribed

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    I think the fuel pump only works when cranking or the air plate in the fuel distributor is deflected. Just use a test light and take one of the wires off the coil or Digiplex
     
    Ferraridoc, Aug 15, 2020
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  6. Ferraridoc

    Ferraridoc F1 World Champ Owner Silver Subscribed

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    D'oh! Didn't see your replies - I let my subscription lapse, and the pop-ups often obscure some of the page :mad:
     
    Ferraridoc, Aug 15, 2020
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  7. Brian Harper

    Brian Harper F1 Rookie Owner Silver Subscribed

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    I would imagine the + terminal on the coils is a pretty solid signal for ignition being on.
     
    Brian Harper, Aug 15, 2020
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    Saabguy and Crowndog like this.
  8. miketuason

    miketuason F1 World Champ Owner Silver Subscribed

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    One of the three wires that goes to the solenoid is connected to the ignition switch, you can tap it from there but use a test light to find out which one is connected to the ignition switch.
     
    miketuason, Aug 15, 2020
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  9. tbakowsky

    tbakowsky F1 World Champ Consultant Professional Ferrari Technician

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    Use your ignition switch as the power source. Run a new fuse and wire directly. Dont try to jump into any existing harness connection points.
     
    tbakowsky, Aug 15, 2020
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  10. thorn

    thorn F1 Rookie Silver Subscribed

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    Well, since he's going with an aftermarket ECU - the existing harness connections will already be reused, yes?
     
    thorn, Aug 16, 2020
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  11. tbakowsky

    tbakowsky F1 World Champ Consultant Professional Ferrari Technician

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    If that is the case..then build a complete stand alone harness completely separate from the cars existing harness. Power it up by it own fuse board using key on ignition power direct from the ignition..just like the factory would do. Distribute power from the fuse board as needed.
     
    tbakowsky, Aug 16, 2020
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