The parking brake light comes on and goes off periodically, and it has nothing to do with me setting the parking brake. It just happens while I'm going down the street. Kind of annoying, but not a big deal.
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Re: Brake light comes and goes
Go to the vehicle, raise the hood. Observe the level of brake fluid in the reservoir in the master cylinder (plastic bottle in front of the driver side firewall)...Look at the side of the plastic bottle...if the fluid is low, this will cause the brake light on the dash to blink on & off. There is a sensor in the cylinder reservoir, that measures the volume of brake fuid. As the brakes wear, the fluid level drops proportionatly. If you have low fluid, you may need some front brakes. Get the brakes checked. If you add fluid, just ot make the light go out, please understand that when you DO get new front brakes, the fluid that you added will be squeezed out of the cylinder, and it will get all over the paint in the engine compartment. Brake fluid damages paint. Hope this helps, and Thanks for choosing FixYa.
The graciousness of a FixYa rating would really be appreciated on my solution to you. Thanks.
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Year/make/model?? Try disconnecting the electrical connector at the master cylinder to see if the light goes out. If it does, suspect a float issue in the reservoir. If light stays on, disconnect plug at park brake to see if it goes out. If it does, suspect park brake switch issue
Apply the parking brake with the vehicle parked, engine turned off and transmission in Park. Release the parking brake completely, then apply it again, and ensure that it is fully released. Turn the ignition on, check to see if the Parking brake warning light is on. If it is NOT on, apply the parking brake and check to see if the warning light comes on. If the light come ON wihen the Parking brake is applied,.....fully release the parking brake and check if the warning light goes OFF. If it does NOT go off, then an adjustment is needed at the parking brake switch.
The brake light is actuated by the float in the brake fluid resevoir. When the sensor travels down the light comes on. When the sensor travels or floats in the fluid the light goes off. Check to see that the brake fluid level is at the full line on the resevoir under thje hood. Most cars of this model use standard dot 3 fluid. Another thing that will turn on the brake light is if the parking brake is applied. Check to see if the park brake is locked in its fully released setting. Sometimes you have to pull the park brake pedal up as you pull the release lever to ensure it is up all the way. riding around with the park brake engaged will burn the rear brake shoes up in a very short time.
there is a sensor in the brake fluid resovoir. if the fluid gets low, the brake light comes on. i'd say its borderline low and when you go up a hill it goes below the sensor level. add a little brake fluid to the resovoir and see if that helps
Do you have a separate parking brake light and a "regular" brake light? Most vehicles only have one light, it illuminates when the parking brake is set, but it also illuminates when the system detects a failure anywhere in the brake system.
You could have a separate light for the anti-lock brake system (ABS ).
Your description of a light that is on till you apply the brakes is usually a sign of some sort of system brake failure. Start with brake fluid level, then inspect the brakes at each wheel, looking for a leak.
If nothing detected there, then you likely have something more serious. (Master brake cyclinder bad, possible something in the ABS brakes, etc.)
Others may disagree, but I would suggest not driving the vehicle (except to a mechanic) until this is corrected.
The problem is the car think the park brake is on (intermittently). I would check the park brake switch, perhaps it's loose, or perhaps the park brake is pushed down to the first "click" spot. Also check the wiring connection to the switch, and the wiring nearby. Good luck!