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brake failure light 200

posted by  NHvolvo on  Thu Aug 1 10:58 CST 2019
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the light goes on because fluid is low refill and light goes out.now I refilled and light stays on,brakes seem fine but this is a new issue.could it be the rings in the brake booster going flat and bad....just thinking if any 240 owner has had this prob. thanxs








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    brake failure light 200

    posted by  james_a_sousa on  Fri Aug 2 17:55 CST 2019
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    last visit: Thu Oct 23 18:51 CST 2014
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    On some volvos, the switch plunger falls into a valley and it will not reset until the switch is raised so that the piston can return to its normal position.








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      brake failure light 200

      posted by  NHvolvo on  Tue Aug 6 09:52 CST 2019
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      so this plunger problem would lead to loss of fluid ? how can I access this plunger? thanks








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        brake failure light 200

        uid 27's pic
        posted by  Art Benstein on  Tue Aug 6 10:49 CST 2019
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        last visit: Fri Oct 17 20:10 CST 2014
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        Never mind. The plunger that needed reset was last used in a 140 volvo. Really is best if you would confirm what year your car is to avoid the guesswork we are doing.
        --
        Art Benstein near Baltimore

        A woman has twins and gives them up for adoption. One of them goes to a family in Egypt and is named "Ahmal." The other goes to a family in Spain; they name him "Juan." Years later, Juan sends a picture of himself to his birth mother. Upon receiving the picture, she tells her husband that she wishes she also had a picture of Ahmal. Her husband responds, "They're twins! If you've seen Juan, you've seen Ahmal."








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          brake failure light 200

          posted by  NHvolvo on  Fri Aug 9 13:36 CST 2019
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          thanks art ...91 245 wagon 3.1 engine.my bulb failure light also stays on but the fact remains I am losing fluid slowly








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            brake failure light 200 1991

            uid 27's pic
            posted by  Art Benstein on  Fri Aug 9 15:04 CST 2019
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            last visit: Fri Oct 17 20:10 CST 2014
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            One of the most difficult mistakes to correct is the Juan/Ahmal syndrome. While Juan and Ahmal are identical twins we might be pretty safe to say if you've seen one you've seen them all. Now I have a couple sets of identical twins in my extended family, and I can assure you similarity in looks is indeed superficial.

            Problem is, people new to Volvo get this idea one 245 is just like another, and don't bother telling us what year, trim, transmission, etc. figuring they're all the same. But they're not.

            Model years 75 to 90 had a pressure differential sensor (brake failure warning switch) to trigger the brake failure light. 91 through 93 used a float level sensor in the reservoir.

            A torn seal in the master cylinder might leak out through the booster to be eventually burned in the engine -- a brake fluid leak well hidden from view. You'd have to separate the cylinder from the booster to confirm this. However there are many other places fluid could leak and not be noticed without a diligent inspection. You need to get your mechanic to do a thorough inspection to find the leak and fix it.
            --
            Art Benstein near Baltimore

            If you have any trouble sounding condescending, find a UNIX user to show you how it's done. -Scott Adams








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    brake failure light 200

    posted by  Trev29 on  Fri Aug 2 05:26 CST 2019
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    last visit: Fri Oct 17 05:56 CST 2014
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    "I refilled and light stays on,brakes seem fine "
    Why are you losing brake fluid?

    I'd suspect that the piston in the brake junction block is stuck to the side which is losing fluid.
    --
    1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.








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      brake failure light 200

      posted by  Rolandp on  Fri Aug 2 15:28 CST 2019
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      last visit: Wed Oct 15 17:36 CST 2014
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      "I'd suspect that the piston in the brake junction block is stuck to the side which is losing fluid."

      It could very well be what Trevor is suspecting above.

      After the brake system is well purged, I would try to pump rapidly and hard in order to free the piston in the junction box.

      It is spring loaded at both ends and it should return in the center of the junction box.

      That should apply on 1986 and older version of 240 in my opinion.








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        brake failure light 200

        uid 27's pic
        posted by  Art Benstein on  Fri Aug 2 19:34 CST 2019
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        last visit: Fri Oct 17 20:10 CST 2014
        [RELATED]

        I checked back on some of the OP's other posts. He posts about a '91. 1991 was the year they did away with the octopus in all 240 models ABS or not. The brake failure light is activated by a float switch in the reservoir. Normally, when it lights, it is time to change brake pads, and if it isn't, it is time to look for the leak.
        --
        Art Benstein near Baltimore

        Pilfered from Eric:

        The Parts Man Prayer

        I work behind the counter
        In an auto parts store
        Sometimes I'm called a genius
        Sometimes I'm called much more.

        I say I'm no mechanic
        But when their job goes sick
        Everyone comes in and asks me
        What makes the damn thing tick.

        I'm supposed to know the number
        Of nuts and bolts and gears
        For every machine ever made
        For more than a hundred years.

        I'm supposed to have the answer
        For everything unknown
        To every Tom, Dick, and Harry
        For all their questions thrown.

        My life would be a pleasure
        And I'd grin from ear to ear
        If only they would tell me
        Their Model, Make, Year







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