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Foot brake 'on' switch

Discussion in 'Suspension, Steering & Brakes' started by NBurns, Nov 10, 2019 at 4:17 PM.

  1. NBurns

    NBurns Senior Member

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    I have just been looking at my foot brake and given the mechanical parts a good lubrication. Then I realised it was actually working pretty well. However when I release the foot brake the foot brake light stays on. Went to look on mbepc to see if the switch was within the mechanism but it doesn't appear to be. I am just going to look elsewhere however if someone already knows where it is so I can see why it is sticking, that would be awesome. Thank you in advance.



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  2. Wighty

    Wighty Senior Member

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    Are you sure it’s brake lights staying on , not fog lights ?
     
  3. OP
    NBurns

    NBurns Senior Member

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    What, when I'm looking at the dashboard?!
    Perhaps, like the Apple support guy I spoke to earlier I need to mention my background. I don't have any major mechanical qualifications however I do know the basics. My background bar my naval career has been in telecomms engineering with my degree being in the same area. Hence why I told myself I was quite capable of doing the repairs I have done this year.
    Just as you asked me that I think I have found the switch on mbepc. Right where I was hoping it would not be,....on the foot pedal itself but further up. According to the diagram. Hey ho, there you go!!!


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  4. EmilysDad

    EmilysDad Senior Member

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    A WEM or WEA? :)

    Brake switches are usually adjustable. When fitting you generally press the pedal down, pull the switch plunger out and then release the pedal which will push the plunger back to the correct position. A click in or out might then be needed.

    I'm assuming it's like the brake switch on my Smart and as my Omega was
     
    Last edited: Nov 10, 2019 at 6:36 PM
  5. Flyinspanner

    Flyinspanner Senior Member

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  6. LostKiwi

    LostKiwi Senior Member

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    Brake light indication on the dashboard? That's a first...
    Or are you talking about the parking brake?
     
  7. OP
    NBurns

    NBurns Senior Member

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    Neither!! I was in communications. But ironically just before my medical discharge I was keen to move to Collingwood to retrain as a WEM and more. So i did Not want to come out. And to prove my point I graduated in communications systems engineering with a 2:1!! Hence would have been a WEO or similar.



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  8. OP
    NBurns

    NBurns Senior Member

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    Yes. Quite possibly



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  9. OP
    NBurns

    NBurns Senior Member

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    Yes the parking brake light.


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  10. AMGeed

    AMGeed Senior Member

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    The brake light switch has nothing to do with the parking brake. It's connected to the actual foot brake.
    After releasing the parking brake handle, try lifting the pedal upwards with your foot. The brake light on the dash should then go out.
    That was happening on my Dad's W203 through insufficient use of the parking brake and it partly seized on. Probably needs lubricating on the adjuster which I believe is under the rear passenger seat. (Could be located elsewhere as I can't remember what year your car is?)
     
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  11. EmilysDad

    EmilysDad Senior Member

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    Well done!

    I never thought that of that much braid! :D

    I went to Collingwood for a time .... must've been for the electrical part of being a MEA .... but it's that long back I can't remember :eek::D
     
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  12. OP
    NBurns

    NBurns Senior Member

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    According to mbepc it is just above the foot pedal hinge point. Which if that is the case it could be difficult to get to.



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  13. OP
    NBurns

    NBurns Senior Member

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    [​IMG]


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  14. AMGeed

    AMGeed Senior Member

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    Ah, not the easiest position is it?
    That part needing freeing up is more than likely why the light is staying on after releasing the parking brake
     
  15. OP
    NBurns

    NBurns Senior Member

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    Yep. Any tips or ideas welcome!!!



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  16. AMGeed

    AMGeed Senior Member

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    If you can actually see the cable and mechanism I'd start by by giving it a liberal spraying with WD40 and operating the park brake up and down to try and free it up.
     
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  17. OP
    NBurns

    NBurns Senior Member

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    Yep. Have done that.


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  18. d215yq

    d215yq Senior Member

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    Some cars allow the mechanism to be accessed under the seats. Mine doesnt have that though so its under the car. I pointed some silicon spray there and it sort of improved but with the cold i just have to help it up with foot. Its fine once warm/in summer.

    By the way if constantly on despite parking brake fully up it can also mean low brake fluid warning too atleast on mine... (though maybe yours ismodern enough to have a different light for that?)
     
  19. M80

    M80 Senior Member

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    Under the rear seat, the mechanism is open to the elements from below.

    As said, lift upward with your left foot on the pedal to diagnose.

    If you're lucky it will be tight with rust, if unlucky it has snapped the return spring.
    Even with a snapped spring you can fashion a repair, and with your superior knowledge it shouldn't be too difficult.

    If just tight, clean it with white spirit perhaps,
    plenty of scrubbing up with a wire brush in both operated and released positions.
    Here it's better removed to get to it properly.
    Apply grease into the hinge, but this may well attract muck over time.
     

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