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Re: Brake Wear Warning Light

Steve Schock All Messages By This Member #104412 One more point with regard to brake pad wear sensors, is that they are embedded in each brake pad at the uppermost point of the inboard pad of each brake caliper. This is right at the inner side at the outer edge of each brake rotor. Looking at a brake rotor from a view of the edge, the shape of the rotor changes, when new, from a flat surface, to some like this )(....meaning that they become somewhat concave and have a lip at the perimeter of the disc. This is the portion of the rotor that will first make contact with the sensor and cut thru the wire. This is often the reason why there is plenty of friction material remaining in the middle of the brake pad, yet the wear sensor light has illuminated in your instrument cluster. It is usually an indication the the rotors are beyond the wear limit and should be discarded and replaced with new ones. Personally, I never "turn" or reface any of my brake rotors on any of our vehicles. I feel that this procedure is silly and a thing of the past. If the rotors are in good shape, simply put the new pads on and go easy on the brakes for the first day or two. The will become "bedded in", conforming to the shape of the old rotor very quickly. If the rotors are scored or have been overheated, warped, etc, then chuck them out and replace them. It is that simple. I don't profess this because I want to sell brake rotors. It is simply a matter of safety. More important than making your car go, is making it stop quickly and safely and brakes are one of the most important systems in your vehicle. Your safety, your family's safety and that of everyone else on the road depends upon it. Steve Schock EUROPARTS-San Diego The Eurovan parts source Website: europarts-sd.com Phone: 858-451-0020 Secure online ordering at: Sea2river@... wrote: toggle quoted message Show quoted text Fifty thousand miles is about the right time to need new pads, particularly in the heavier EVC. The front and the rear pads are sized to wear out about the same time. While the front pads are larger, they apply most of your stopping power. One brake pad on each wheel has a wire embedded in it. When any one of those four pads is worn down to that wire such that the wire is severed, "brake warning light" circuit continuity is now lacking and the light on the dash board illuminates. In addition, if for some reason a wire elsewhere in the circuit gets severed or a connector is loose, circuit continuity is also broken and the light will illuminate. In my case, the front pads were the first to need replacement. When the light illuminated at 73,000 miles, I found that one of the front pads had worn to the extent that the wire in the pad was severed. Measuring that pad revealed that I could expect about another 40,000 miles from the pad before the pad's backing plate scraped the rotor. But that would mean 40,000 more miles with a light and periodic buzzer. Hence, I changed the front pads and the dashboard light extinguished. About 2000 miles later, the light again illuminated and I found that the wire in one of the rear pads was severed. After replacing the rear pads the light extinguished and remains so at 124,000 miles. I suspect that the wire in each pad is embedded at an imprecise depth such that once the wire is severed, one may have anywhere from zero to five mm of pad remaining and perhaps more. If you want to "reset the warning system" then you must restore circuit continuity. My suspicion is that replacing the pads on all four wheels will solve your problem. There are instructions in our files section for DIY pad replacement. Good luck, Bob W. In a message dated 6/10/2008 7:32:39 P.M. Eastern Daylight Time, clyde318000@... <mailto:clyde318000%40msn.com> writes: I have a '02 EVC with 50k miles on it. Last week a warning light came on indicating that the brake pads needed replacement. My friendly Les Schwab dealer pulled the tires and found that the pads were in good shape - more than 50% wear left. That's the good news, the bad is warning light remains on and emits an earspliting buzzing sound about every third time I start up the van (same sound as the low fuel buzzer). Any thoughts on resetting the warning system? Thanks. Clyde the Guide ****Vote for your city's best dining and nightlife. City's Best 2008. ( <>)

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#104412

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