Testarossa wiring questions | FerrariChat

Testarossa wiring questions

Discussion in 'Technical Q&A' started by jratcliff, Dec 5, 2007.

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  1. jratcliff

    jratcliff Formula 3

    Sep 7, 2004
    1,024
    Texas
    I wonder if there is anyone here who can answer a few questions on the Testarossa (91) wiring?
    What are the items that are powered when the ignition is turned on that apply to running the motor? This would include any inter-ralational components.
    John
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,932
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    Is this a US version TR?

    Do you mean with the key "on" and the engine not actually running?

    If your answers to the above questions are both "yes", the only engine components that receive +12V power with the key "on" and the engine not running are the ignition ECU and the coils/power modules. Everything else (injection ECUs, fuel pumps, various heaters, etc.) gets +12V power only if the key is "on" and the engine is actually running, or if the key is in Pos III (i.e., starter motor cranking).

    Can you clarify your quest?
     
  3. jratcliff

    jratcliff Formula 3

    Sep 7, 2004
    1,024
    Texas
    Steve,
    I will be in position to confess all in a few weeks.
    John
     

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