In addition to thrumming, your brake pedal can give you other indications that your car's braking system might need examining.
A mushy pedal, one that goes practically to the floor before engaging the brakes, could indicate worn pads or a problem with the hydraulic system, such as air in the line, an air leak or a brake fluid leak. To check for a fluid leak, put an old white sheet or piece of light cardboard under the car overnight. In the morning, examine any fluid that collects. Brake fluid will be practically clear and the consistency of cooking oil.
The opposite of a mushy pedal is one that causes the brakes to grab immediately at the slightest touch. This could indicate an unevenly worn rotor, dirty brake fluid or contamination of the fluid by moisture. You can solve such a problem with a relatively inexpensive change of fluid that you could do yourself or have done at your mechanic's shop.
Finally, if stopping the car seems akin to Fred Flintstone putting his feet through the bottom of the car to bring it to a halt, you might have a brake line obstruction or a problem with the vacuum system. Both situations would make the brake pedal extremely hard to operate and require immediate servicing.
For lots more information about your brakes, check out the next page.
- 5 Things You Can Do to Make Your Car Safer for Driving in Foul Weather
- Top 10 Safe Driving Tips
- How Brake Bleeding Works
- How Brake Failure Works
- How Brake Lines Work
- How to Check Brake Fluid
- What tests work for diagnosing brake problems?
- What do the brake warning lights mean in my car?
- Why does your steering wheel shake when braking?
- AA1car.com. "How To Fix Common Brake Problems." Oct. 3, 2010. (Oct. 6, 2010)http://www.aa1car.com/library/bfixes.htm
- Anson, Mike. "Brakes, tires, shocks ensure safety." The Washington Times. Jan. 8, 1999. (Oct. 5, 2010)http://www.highbeam.com/doc/1G1-56769300.html
- Autos.com. "How to Spot a Brake Fluid Leak." July 1, 2010. (Oct. 8, 2010)http://www.autos.com/auto-repair/how-to-spot-a-brake-fluid-leak
- Calka, Lou Jr. "Pulling You In to Brake Diagnostics." Tomorrow's Technician. May 1, 2005. (Oct. 5, 2010)http://www.tomorrowstechnician.com/Article/610/pulling_you_in_to_brake_diagnostics.aspx
- Canadian Tire Corporation. "Brake System." 2010. (Oct. 9, 2010)http://www.canadiantire.ca/browse/subcontent_landing.jsp?FOLDER%3C%3Efolder_id=2534374303521995&bmUID=1286366853227
- Car Junction Ltd. "Consumers Can Avoid Problems by Watching for Warning Signs." Feb. 9, 2009. (Oct. 10, 2010)http://www.carjunction.com/consumers_can_avoid_problems_by_watching_for_warning_signs.html
- duPre, Peter D. "How well do you know your brakes?" iCARumba. 2010. (Oct. 9, 2010)http://www.icarumba.com/cobrands/contentmodules/resourcecenter/articles/icar_resourcecenter_articles_brakes.asp
- Daily Herald. "Brake maintenance crucial for a safe car." March 20, 2010. (Oct. 7, 2010)http://www.highbeam.com/doc/1G1-221668035.html
- Hakim, Danny. "Average U.S. Car Is Tipping Scales at 4,000 Pounds." The New York Times. May 5, 2004. (Oct. 5, 2010)http://www.nytimes.com/2004/05/05/business/average-us-car-is-tipping-scales-at-4000-pounds.html?ref=danny_hakim
- Jedlicka, Dan. "Stop brake problems before they stop you." Chicago Sun-Times. July 25, 1990. (Oct. 5, 2010)http://www.highbeam.com/doc/1P2-4009028.html
- James Madison University. "Tables of speed and stopping distances." Oct. 2, 2009. (Oct. 8, 2010)http://www.jmu.edu/safetyplan/vehicle/generaldriver/stoppingdistance.shtml
- J.D. Power and Associates. "Warning Signs You Need New Brakes." 2010. (Oct. 5, 2010)http://www.jdpower.com/autos/articles/Warning-Signs-You-Need-New-Brakes/
- Just Brakes. "Warning Signs." 2010. (Oct. 6, 2010)http://www.justbrakes.com/warning-signs.asp
- KGUN9 ABC. "Brake Warning Signs." 2010. (Oct. 5, 2010)http://www.kgun9.com/Global/story.asp?S=10931406
- Longhurst, Christopher J. "The Brake Bible." July 12, 2010. (Oct. 6, 2010)http://www.carbibles.com/brake_bible.html
- Midas International Corporation. "Brakes: What to Watch For." 2010. (Oct. 7, 2010)http://www.midas.com/AutoEducation/Brakes/WhattoWatchFor/tabid/91/Default.aspx
Want to know how to check brake pads? Visit HowStuffWorks to learn how to test brake pads.