BRAKE light on and off while driving
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This is a discussion on BRAKE light on and off while driving within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Anyone else seen this? Could it be yet another cold-weather trick for the 02 WRX's? When I would disengage the ...

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    Registered User grizzle's Avatar
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    BRAKE light on and off while driving

    Anyone else seen this? Could it be yet another cold-weather trick for the 02 WRX's? When I would disengage the e-brake, the BRAKE light on the inst. panel would stay on. Lately, it will come on when I accelerate hard. But, the traction is good and tires are new, is this some sort of traction warning, does anyone know? The BRAKE staying on after disengaging the e-brake seemed to go away with the cold weather, but i still get the BRAKE indicator at times when driving. usually pops up during hard accel in 2nd or 3rd gear.
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    He simply abides. SD_GR's Avatar
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    As your brake pads wear down, the fluid level in the reservoir drops. This causes the floater to trip the circuit and the light comes on. Check your brake fluid level, and if it's been some time or you've put on hard use, check your brakes (you should be checking the brakes anyway every time you rotate wheels since the wheels are off to begin with).
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    Hammerdown Mod of Thunder josnroh's Avatar
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    Had the same problem,it was low on brake fluid.
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    Registered User grizzle's Avatar
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    Quote Originally Posted by SD_GR View Post
    As your brake pads wear down, the fluid level in the reservoir drops. This causes the floater to trip the circuit and the light comes on. Check your brake fluid level, and if it's been some time or you've put on hard use, check your brakes (you should be checking the brakes anyway every time you rotate wheels since the wheels are off to begin with).

    thanks. can I simply add brake fluid? i try to be a DIYer, but i must admit i am noob on the brakes.
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    Registered User 68sprintb's Avatar
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    yep, it's real easy... open the hood and check that it's actually low, then just add some DOT3 (i think) brake fluid to the brake fluid master reservoir
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    Yes DOT 3 or DOT 4.
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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by grizzle View Post
    thanks. can I simply add brake fluid? i try to be a DIYer, but i must admit i am noob on the brakes.
    Yes. The manual (and usually the reservoir cover) specify the type to be used. Do keep in mind though that your pads are not as thick as they used to be, and it's a great idea to figure out exactly what's left. Many shops provide free brake inspections if you're not up to it, or look here and/or scoobymods for instructions.

    Since the light only comes on when you're accel/decelerating it's unlikely there's a leak. A solid light and silly feel to the pedal would be cause for alarm though. Every time you rotate wheels it's a terrific idea to check the brakes (pad thickness and make sure no juice is coming out the lines or calipers).
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
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    It may also just need a computer reset. I was having this same problem in my Honda, and I happened to need an oil change / tire rotation and when they did it the brakes were looked at and still had like 70% of their pads left. The fluid was checked and it was fine too. Took it to a honda specialist and the guy checked brakes / fluid and since there was nothing wrong he didn't charge me and just told me how to reset the computer.. This was about 9k miles ago and I haven't had any problems.

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    Registered User grizzle's Avatar
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    Quote Originally Posted by SD_GR View Post
    Yes. The manual (and usually the reservoir cover) specify the type to be used. Do keep in mind though that your pads are not as thick as they used to be, and it's a great idea to figure out exactly what's left. Many shops provide free brake inspections if you're not up to it, or look here and/or scoobymods for instructions.

    Since the light only comes on when you're accel/decelerating it's unlikely there's a leak. A solid light and silly feel to the pedal would be cause for alarm though. Every time you rotate wheels it's a terrific idea to check the brakes (pad thickness and make sure no juice is coming out the lines or calipers).
    THANKS! added a little DOT3 and the light went away. it is hard to tell the level on the reservoir, though. I skimped a little out of caution. I will need the wheels rotated soon, so i will do the brake check. as for now, pedal feels normal and no squeaks from the stoppers.
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    He simply abides. SD_GR's Avatar
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    Quote Originally Posted by grizzle View Post
    THANKS! added a little DOT3 and the light went away. it is hard to tell the level on the reservoir, though. I skimped a little out of caution. I will need the wheels rotated soon, so i will do the brake check. as for now, pedal feels normal and no squeaks from the stoppers.
    OK great. Another thing to check while the wheels are off are the shafts; make sure they are dry. Of course make sure the brake lines are dry too. Then, when the wheel is back on, check for bearing wear by grasping the wheel at the top and bottom edges and pulling -- there should be no play.
    Be careful though, and make sure the car is supported correctly, especially if you're going to get close to it to check the pad thickness.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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