brake light on and constant chime - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-18-2012, 08:42 PM   #1
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Default brake light on and constant chime

94 bonneville- yesterday as i driving the brake light came on and there was a constant chiming noise. I checked the brake fluid res and it was low. so I replaced the front brake pads, bled the brakes, and fill the res... the light went off for a second and then came back on with the noise. My abs wheel sensor is out on the passenger hub. And when i drive the car i smell a burnt smell coming from the passenger tire and the rim and rotors are hot to the touch. ne clues on what'* going on???
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Old 08-19-2012, 05:31 AM   #2
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With the wheel and rotor being hotter than the drivers side, this would indicate a brake caliper/or caliper piston not releasing and its still "braking".

When you replaced the pads, did you clean/lube the guide pins for the calipers?
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Old 08-19-2012, 11:32 AM   #3
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The other thing you might want to check is the switch at the top of the park brake pedal. If it is out of position it may think the park brake is depressed when it is not.

Bleed your brakes some more.

Pull and clean the adjuster pins on the front left brake caliper, apply proper grease, and re-install.

Check the condition of the brake hoses at all 4 wheels.
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Old 08-19-2012, 11:29 PM   #4
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ok thanks will try...I also noticed today than my reservoir tank is at min level again after being on max right after i changed the front pads yesterday
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Old 08-29-2012, 10:54 PM   #5
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Quote:
Originally Posted by mckcuzzi View Post
94 bonneville- yesterday as i driving the brake light came on and there was a constant chiming noise. I checked the brake fluid res and it was low. ?
I don't know if you have this resolved yet, but...

The brake light and chiming is notice to get off of the road, because your brake system is losing pressure. (The reservoir was low, right?)

I can't know if your discs are having a problem. But if you can't find anything...

Either pull the covers off of your rear drums, or reach/look around from underneath the car. Check to see if the brake cylinders on either side are leaking fluid. There will be a fluid stain. They can do it easily without you noticing it in normal day to day use.

The way our brake systems work (it'* almost like 2 systems) you can lose a little fluid and a lot of effective pressure in the rear, before the fluid shortage appears in the reservoir and the system knows it'* losing pressure.

Also, if you are losing pressure at the drums, you're stopping on your front brakes. Which is not a world-ender, because the discs normally have the majority (80%?) of the stopping work. But you'll stress the fronts, and go through pads faster.
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Old 08-30-2012, 10:12 PM   #6
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X2 on the leaking rear brake cylinders inside the drums.

You may have a rusted brake line that is seeping brake fluid under pressure while stopping. You may have a leak in the master cylinder losing brake fluid.

The front brake dragging on the passenger side is the most likely problem. The pins that hold the calipers on that design ride inside rubber tubes. Those rubber tubes are held in the metal "ears" on the caliper. The rubber hardens. The inside of the ears rust and that squeezes inward on the rubber around the slide pins. You may also have a problem with the seal on the piston inthe caliper. My suggestion is to replace both calipers with remanufactured calipers. Work quickly so you don't lose much brake fluid at the connection for the brake fluid line at the caliper.

You already put on new pads. Assuming your rotors are straight, this should get you back to a good brake system.
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