505, unconnected fly wheel sensor?
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  1. #1
    Fellow Frogger! tomb's Avatar
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    Default 505, unconnected fly wheel sensor?

    Just doing some work on the 505 GTi and there is a wire connected to the the base of the fly wheel, a timing sensor prehaps, goes up to a three point plug in the engine bay but this is not plugged into anything.

    Obviously not very important as th car goes fine, but what is it and what should it connect to?

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  2. #2
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by tomb View Post
    Just doing some work on the 505 GTi and there is a wire connected to the the base of the fly wheel, a timing sensor prehaps, goes up to a three point plug in the engine bay but this is not plugged into anything.

    Obviously not very important as th car goes fine, but what is it and what should it connect to?
    Some of the diesel cars had a tacho operated of a flywheel sensor I believe?

    Could the car have "donor" parts?

  3. #3
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    Quote Originally Posted by tomb View Post
    Just doing some work on the 505 GTi and there is a wire connected to the the base of the fly wheel, a timing sensor prehaps, goes up to a three point plug in the engine bay but this is not plugged into anything.

    Obviously not very important as th car goes fine, but what is it and what should it connect to?
    Connect to tuning equipment, the GR/SR has this as well.
    Graham

  4. #4
    Fellow Frogger! tomb's Avatar
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    Thanks Robmac and Graham, didn't think it was too important,

    Tom

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    1000+ Posts Beano's Avatar
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    There used to be a special diagnostic machine which you could connect to that 3-point plug in the engine bay. But it really has been donkeys years since I saw one. I usually cut off the plug and wiring just to simplify things in the engine bay.

  6. #6
    Fellow Frogger! Uffee's Avatar
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    Quote Originally Posted by GRAHAM WALLIS View Post
    Connect to tuning equipment, the GR/SR has this as well.
    Graham
    As does my '83 504 diesel ute. Identical to the diesel tach inductive pickup but ends in a terminal block on top of the rocker cover.
    504 GL Coupe '73 Silver
    504 GTDT Pickup Mini-Motorhome '83 Coral Red
    407 HDi Sedan '05

  7. #7
    1000+ Posts catshamlet's Avatar
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    My '87 GTi has it, it just hangs about doing nothing.



    Mike.
    Started out with nothing, still got most of it left.

  8. #8
    Fellow Frogger! Doush_504's Avatar
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    My 1982 504 SR has it too.
    It's written in the owners manual that the car has a "Prise de diagnostic" but does not specify it's location.
    Quote Originally Posted by GRAHAM WALLIS View Post
    Connect to tuning equipment, the GR/SR has this as well.
    Graham
    Any idea what sort of tuning exactly ? Just curious
    Chadi

    1982 504 SR white manual sedan with A/C (266 000 Km)
    2012 308 1.6 VTi Vapor Grey manual H/B (52000 Km)
    1994 405 1.6 white manual sedan (236 000 Km)
    1992 605 SV24 (91 000 Km)
    2005 406 2.0L automatic (Replaced with a 2013 C5)
    1983 505 GR white manual sedan with A/C (170000 Km)

    All since new


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