break light turns on during hard breaks.

Reply
 
LinkBack Thread Tools Display Modes
Old 19 Sep 2004, 03:59 pm   #1 (permalink)
Tevfik Yücek
Guest
  • Posts: n/a
  • User Status:


Default break light turns on during hard breaks.

Hi all,

I have a 91 camry. During the last weeks, I realized that my break
light turns on when I do hard (not so hard) breaks. When the car
stops (or I stop breaking), it turns off. I did not have this
problem before.

What is the reason for this. Is there something wrong with the
breaks? By the way, the breaks work just fine, at least for now.

Thanks,
Tevfik
  Reply With Quote
Old 19 Sep 2004, 07:20 pm   #2 (permalink)
M. Hamill
Guest
  • Posts: n/a
  • User Status:


Default Re: break light turns on during hard breaks.

As brake pads wear, the volume of brake fluid needed to press the pads
against the rotors increases. Some brake fluid is temporarily withdrawn from
the reservoirs of your master cylinder during braking, and it returns to the
apparently correct level in the reservoirs when you let off the brakes, due
to the action of springs at the brake actuators (an internal spring-like
mechanism in the case of the calipers used with disc brakes).

Usually it will take more movement of the brake pedal to achieve braking
when this happens, too.

So the illumination of the brake light in your circumstance is a sign that
the brake pads are nearing the end of their useful life and will need to be
replaced soon, even if you don't hear a suspicious sound.

If you don't replace the brake pads before the end of their useful life,
you'll damage the brake rotors. They'll usually get a bit noisy before that
happens.

Each car has a specification for minimum brake pad thickness. If you take
off the wheels and inspect the pads, you can look at them and see if they
are in need of replacement.

So it doesn't take a brake fluid leak for this light to come on. And I've
never heard of a case where brake fluid leaked slowly; when it leaks, it
usually happens suddenly, as, for example, when the wheel cylinder of a drum
brake fails.
----
Tevfik Yücek <tevfik.yucek@gmail.REMOVE.com> wrote in message
news:slrnckrtoa.jr4.tevfik.yucek@eflani.eng.usf.ed u...
: Hi all,
:
: I have a 91 camry. During the last weeks, I realized that my break
: light turns on when I do hard (not so hard) breaks. When the car
: stops (or I stop breaking), it turns off. I did not have this
: problem before.
:
: What is the reason for this. Is there something wrong with the
: breaks? By the way, the breaks work just fine, at least for now.
:
: Thanks,
: Tevfik



  Reply With Quote
Old 19 Sep 2004, 10:20 pm   #3 (permalink)
Tevfik Yücek
Guest
  • Posts: n/a
  • User Status:


Default Re: break light turns on during hard breaks.

Hi Hamill,

Thanks for the valuable information. I will bring my car to a
mechanic as soon as I have time for it.

Thanks for your time again,

Tevfik

On 2004-09-20, M. Hamill <mhamill@fuse.net> wrote:
> As brake pads wear, the volume of brake fluid needed to press the pads
> against the rotors increases. Some brake fluid is temporarily withdrawn from
> the reservoirs of your master cylinder during braking, and it returns to the
> apparently correct level in the reservoirs when you let off the brakes, due
> to the action of springs at the brake actuators (an internal spring-like
> mechanism in the case of the calipers used with disc brakes).
>
> Usually it will take more movement of the brake pedal to achieve braking
> when this happens, too.
>
> So the illumination of the brake light in your circumstance is a sign that
> the brake pads are nearing the end of their useful life and will need to be
> replaced soon, even if you don't hear a suspicious sound.
>
> If you don't replace the brake pads before the end of their useful life,
> you'll damage the brake rotors. They'll usually get a bit noisy before that
> happens.
>
> Each car has a specification for minimum brake pad thickness. If you take
> off the wheels and inspect the pads, you can look at them and see if they
> are in need of replacement.
>
> So it doesn't take a brake fluid leak for this light to come on. And I've
> never heard of a case where brake fluid leaked slowly; when it leaks, it
> usually happens suddenly, as, for example, when the wheel cylinder of a drum
> brake fails.
> ----
> Tevfik Yücek <tevfik.yucek@gmail.REMOVE.com> wrote in message
> news:slrnckrtoa.jr4.tevfik.yucek@eflani.eng.usf.ed u...
>: Hi all,
>:
>: I have a 91 camry. During the last weeks, I realized that my break
>: light turns on when I do hard (not so hard) breaks. When the car
>: stops (or I stop breaking), it turns off. I did not have this
>: problem before.
>:
>: What is the reason for this. Is there something wrong with the
>: breaks? By the way, the breaks work just fine, at least for now.
>:
>: Thanks,
>: Tevfik
>
>
>

  Reply With Quote
Old 20 Sep 2004, 08:31 am   #4 (permalink)
jimhigh66
Guest
  • Posts: n/a
  • User Status:


Default Re: break light turns on during hard breaks.

I would not argue with having your brakes checked, but I have an '89 Camry
that has the brake warning light come on occasionally over the past year
and the fluid is always a little low. The fluid "sloshes" a little bit
when you brake and apparently triggers the low fluid sensor.
( Yeah, I need to check my brakes. )
Happy trails.


  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 05:40 am.

Attribution:
Autoblog
Powered by Yahoo Answers



ToyotaLexusForum.com is an unofficial community for car enthusiasts. ToyotaLexusForum.com is not affiliated with Toyota Motor Corporation in any way.
Toyota Motor Corporation does not sponsor, support, or endorse ToyotaLexusForum.com in any way.
Copyright/trademark/sales mark infringements are not intended or implied.