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Thread: brake/clutch fluid reservoir sensor

  1. #1
    Join Date
    Dec 2011
    Location
    New York, NY
    Posts
    42
    My Cars
    2002 porsche carrera

    brake/clutch fluid reservoir sensor

    i assume the float in the brake/clutch reservoir and the wires coming off the reservoir cap are for a level sensor?

    i was bleeding the clutch, and i guess i was a little too vigorous moving the cap around: i pulled the cap electrical plug right off its wires.

    no big deal, i know there's fluid in there as i just flushed and bled it, and i can repair the connector tomorrow...

    but why am i getting no warning lights in the dash?

    is this in fact a level sensor?

    [1988 m6]

  2. #2
    Join Date
    Aug 2010
    Location
    West Nyack, New York
    Posts
    1,391
    My Cars
    86 635csi 98 740i 96 MB
    Yes, the bottom of the cap is a level sensor.
    If the wires were pulled off the sensor, the circuit will be interrupted to trigger the brake light on the dash.

    See page 6210-2 lower left corner

    https://www.millerperformancecars.co...g%20Manual.pdf
    Last edited by 1986series6; 01-08-2023 at 07:00 AM.

  3. #3
    Join Date
    Jul 2008
    Location
    Boston, Ma
    Posts
    1,647
    My Cars
    86 635,72 E3, 88M6,73 E9
    or, just connect the two if you want to see the light!
    Rob E3

  4. #4
    Join Date
    Dec 2011
    Location
    New York, NY
    Posts
    42
    My Cars
    2002 porsche carrera
    thanks guys!
    exactly what i was looking for.
    interesting that its a normally open switch rather than normally closed.

    and thanks for the manual link. the e24 has been the one car of mine that i havent needed to hunt down manuals for... yet.

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