Your Best Source for Genuine Mazda Parts!
Your Best Source for Genuine Mazda Parts!
Page 1 of 2 12 LastLast
Results 1 to 15 of 16

Thread: Brake light coming on in cold weather?

  1. #1
    Registered Member


    Join Date
    Jul 2003
    Location
    Wilmington, NC
    Posts
    18

    Brake light coming on in cold weather?

    I've noticed recently that my brake light has started coming on in cooler weather when I brake. Sometimes it only flicks on when I'm braking, sometimes it stays on while idling and then goes off when I start moving again, and sometimes it just stays on the entire time i'm driving after I brake initially. it doesnt seem to matter whether the motor is warm or not, but what the weather is like outside. I have a 2003 P5 with about 14k on it and have never had work done. And yes, I know the e-brake it not on
    I'm getting mixed reactions from people-- some say it cant be the fluid cause the light isnt hooked up to it, some say it cant/can be the pads (there is no squeeling at all) some say the light is just sticking, but then why would it come on only while braking?
    I dont know much about P5s (I owned a geo before and did most of my own work) but I'd hate to bring it in if its just low on fluid. However, I dont even know HOW to check the fluid in this car, and it IS under warentee so I dont want to screw with it....
    Any advice? I tried a search and got nothin...

  2. #2
    '04 Mazdaspeed MX-5 #1089 jersey_emt's Avatar

    04 MSM #1089

    Join Date
    Aug 2003
    Location
    Center of infinity
    Posts
    9,429
    Most likely the fluid. Take a look at the brake fluid reservoir, and add fluid if necessary

  3. #3
    Missing my Protege vindication's Avatar
    Donated: $10

    2001 Pro 2.0 LX

    Join Date
    Feb 2003
    Location
    Formerly in NY, Now in Portugal!!
    Posts
    5,146
    once more, another damn thread. it's the brake fluid, due to the cold weather the fluid contracts. So when the car is cold, not warmed up, fill it up. There are 1000000 threads flyin around. SEARCH people.
    It's like I'm smoking their thoughts.

  4. #4
    Registered Member Dimitrios's Avatar
    Donated: $20

    2012 CWP MS3

    Join Date
    May 2003
    Location
    Chicago
    Posts
    4,553
    yep, check the fluid as it's a common reason for the light to flicker and exhibit that behavior

  5. #5
    Registered Member


    Join Date
    Jul 2003
    Location
    Wilmington, NC
    Posts
    18
    ^^I ran a search under "brake light" and didn't see anything related. I do appreciate the info, though.

    I spose I need to go buy a hayes manual and figure out how to fix this eh?

  6. #6
    Missing my Protege vindication's Avatar
    Donated: $10

    2001 Pro 2.0 LX

    Join Date
    Feb 2003
    Location
    Formerly in NY, Now in Portugal!!
    Posts
    5,146
    no manual needed. Go buy DOT-3 brake fluid and when the car is cold fill the brake reservoir. It's the thing in the drivers side against the firewall
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  7. #7
    ...and it was all yellow cbcbd's Avatar
    Donated: 5$

    02 P5

    Join Date
    Jan 2003
    Location
    Seattle,WA
    Posts
    3,027
    There is no fix. If you're low on fluid,put in some more. If you are not, then just get new pads, they are low.

    Last winter I drove for 3 months with the brake light coming on every day and only going away sometimes during my commute. Fluid was fine. Changed pads and the light went away
    2002 Yellow Pro5 #100,994



  8. #8
    Banned
    Donated: $10

    2001 Mazda MP3

    Join Date
    Jan 2003
    Posts
    8,304
    weird that the light went away when you put new pads on since the car has no idea how much pad is left.... thats why when you ARE Low on the pads, you get a nice metaly noise to indicate they are on their last leg.

  9. #9
    Registered Member


    Join Date
    Jul 2003
    Location
    Wilmington, NC
    Posts
    18
    ^^yeah thats what I thought too...I didnt think there were sensors that could indicate the thickness of the pads, I figured the only way to tell was from the sound...?

  10. #10
    Registered Member alexlitov's Avatar


    Join Date
    Sep 2002
    Location
    Bay Area
    Posts
    3,051
    my noise and brake light went away and my pads are still low

  11. #11
    ...and it was all yellow cbcbd's Avatar
    Donated: 5$

    02 P5

    Join Date
    Jan 2003
    Location
    Seattle,WA
    Posts
    3,027
    Quote Originally Posted by pdhaudio83
    weird that the light went away when you put new pads on since the car has no idea how much pad is left.... thats why when you ARE Low on the pads, you get a nice metaly noise to indicate they are on their last leg.
    I don't remember hearing the noise, but who knows, maybe it was just because of loud music?

    When the pads are low it takes more fluid to push them against the rotor, so the fluid taken from the reservoir is increased, making the sensor see low fluid, which triggers the brake light.
    Add that to the whole cold weather and fluid contracting and needing to warm up and you have a car that doesn't have too low brakes, but that with the winter weather causes the light to be on 24/7.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

  12. #12
    Banned
    Donated: $10

    2001 Mazda MP3

    Join Date
    Jan 2003
    Posts
    8,304
    this is true. you must have not been at max in the resv to begin with

  13. #13
    Registered Member


    Join Date
    Jul 2003
    Location
    Wilmington, NC
    Posts
    18
    So, for someone who has never done ANY kind of brake work, its going to be easy to find/fill the reservoir?
    also, how does the fluid get low other than having lowish pads? I was under the impression that it couldnt get low any way aside from the master cylinder leaking, but again, i'm used to a 93 geo so i could be wrong

  14. #14
    Banned
    Donated: $10

    2001 Mazda MP3

    Join Date
    Jan 2003
    Posts
    8,304
    yep. its mounted to the back of the firewall near the air intake pipe that connects to the throttle body.

  15. #15
    '04 Mazdaspeed MX-5 #1089 jersey_emt's Avatar

    04 MSM #1089

    Join Date
    Aug 2003
    Location
    Center of infinity
    Posts
    9,429
    Quote Originally Posted by pr5pixie
    So, for someone who has never done ANY kind of brake work, its going to be easy to find/fill the reservoir?

    It's right in the engine bay against the firewall on the driver's side.
    Sigs are visible only in your first post on a page. To change your thread display preferences, click here and enable 'Always Show Signature'.

Page 1 of 2 12 LastLast

Similar Threads

  1. emergency brake light on
    By shoelessdavis in forum Mazda MP3 Lounge & Welcome Area
    Replies: 3
    Last Post: 10-21-2004, 09:58 AM
  2. hand brake light problem
    By mopiko in forum Protege5 Lounge & Welcome Area
    Replies: 11
    Last Post: 01-13-2004, 04:11 PM
  3. Third (or is it fourth?) brake light help, please
    By Kain in forum Audio & Electronics
    Replies: 2
    Last Post: 07-27-2003, 07:44 PM
  4. brake light coming on...
    By deckedoutmp5 in forum Protege5 Lounge & Welcome Area
    Replies: 3
    Last Post: 07-11-2003, 02:38 PM
  5. CAI and cold weather
    By hawkwind101 in forum Protege5 Lounge & Welcome Area
    Replies: 8
    Last Post: 01-22-2003, 03:16 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •