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What would cause the brake light on the dash to come on in a 1995 gmc sierra?
Wiki User
∙ 17y ago
IS it the BRAKE LIGHT or the Parking Brake Light? If it is the BRAKE LIGHT, then your pedal must be going down far enough to hit a sensor that sets off the brake light to tell you your brakes need serviced. Normally this means you are low on brake fluid. If you are low on brake fluid FIND OUT WHY! You may have excessive brake pad wear, or a leaking brake cylinder, or your master cylinder may be going out. If you keep pumping the brakes and then stand on it hard, feel for the pedal to eventually go soft, if it does, then normally the seals in the master cylinder are going out. If you pump the brakes and the pedal never gets hard, then you have a serious brake fluid leak. If the Parkign Brake light stays on, then your parking brake is not fully releasing, at least where the contacts are to remind you it is on. This can be adjusted.
Wiki User
∙ 17y ago
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What would cause brakes to suddenly go out completely?
Any sudden brake loss can be the cause of 1. brake line damage 2. master cylinder disfunction
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These lights are probably all related. When there is a problem in the ABS system, this will disable the TRACTION system, which will inturn illumiinate the Service Vehicle Soon light. A common cause for this is there is a problem in the ABS. A faulty wheel speed senor or the harness to the sensor may be faulty. When the ABS computer (EBCM) sees a problem in the ABS, it can cause all these lights to come on. A scan of the ABS computer would be the first thing needed. Then, diagnosis of the system / circuit that is at fault would be needed. Tech JK -----------------------------------------------
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