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  #1 (permalink)  
Old 28 Sep 2010, 10:45 am
edb edb is offline
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Default brake light

Last night, when my PT hit a bump, just a regular bump we normally see on road, the brake light came up, and an alert sound was heard, both were very brief and lasted for less than a second. Other than that, the driving was just fine. The same thing happened a few days ago.

At this point, it looks like random events, and did not happen at every single bump.

Is anything coming loose?
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Old 28 Sep 2010, 01:38 pm
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Default Re: brake light

You are approaching the need for new pads.
The brake light is turned on by a low fluid level sensor in the master cylinder.
When you accelerate, hit bumps, etc, the brake fluid sloshes around and exposes the sensor. The fluid level is low because your barkes have worn down.
You will get the "ding" and light more often until you :
1) put in new brakes - or -
2) add brake fluid. If you add fluid, it may overflow later when you do new brakes.
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Old 28 Sep 2010, 01:46 pm
edb edb is offline
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Default Re: brake light

Quote:
Originally Posted by quicksilverdon View Post
You are approaching the need for new pads.
The brake light is turned on by a low fluid level sensor in the master cylinder.
When you accelerate, hit bumps, etc, the brake fluid sloshes around and exposes the sensor. The fluid level is low because your barkes have worn down.
You will get the "ding" and light more often until you :
1) put in new brakes - or -
2) add brake fluid. If you add fluid, it may overflow later when you do new brakes.
Thank you very much, it seems I have another project to work on.

I went to Pep Boys for brake system check last month, they told me the rear ones have 50% left, and the front has 80% left.
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Old 29 Sep 2010, 01:52 pm
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Default Re: brake light

Don is a little mistaken here. The low fluid certainly does not mean your pads are worn, but is probably the reason your light flashes on. You may just need to top off the fluid. There may or may not be a leak in the system.

Sounds like your pads are just fine.
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Old 29 Sep 2010, 02:12 pm
edb edb is offline
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Default Re: brake light

Quote:
Originally Posted by heifetz17 View Post
Don is a little mistaken here. The low fluid certainly does not mean your pads are worn, but is probably the reason your light flashes on. You may just need to top off the fluid. There may or may not be a leak in the system.

Sounds like your pads are just fine.
Thank you for letting me know that.

Though I changed plugs and wires by myself last week, I am still new to car maintenance. Is adding brake fluid a DIY job? or do I have to go to a shop? I heard that air bubbles should not be allowed in the brake system. BTW, where I can find the brake fluid for PT?

Thanks again.
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Old 29 Sep 2010, 04:29 pm
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Default Re: brake light

As long as you do not wait til all the fluid is gone, you can top off the brake fluid. The PT uses standard DOT 3 brake fluid which can be found at any auto parts store.
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