3800 Brake Question

[BlkJak]

A friend of my GF's has a 99 Grand Prix GT and is currently having a problem with the brakes. When she hits the brakes, they grind something terrible. Then the anti-lock brake light comes on and the grinding stops. Any ideas??? They mechanic she had look at it scratched his head and told her to disconnect the anti=lock brake system!! WHO DOES THAT????!!! So I told her I would ask you guys....... If you have any ideas, let me know.


Thanks guys.

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[Blownbyyou]

Originally posted by BlkJak@Aug 24 2005, 06:42 AM
A friend of my GF's has a 99 Grand Prix GT and is currently having a problem with the brakes.  When she hits the brakes, they grind something terrible.  Then the anti-lock brake light comes on and the grinding stops.  Any ideas???  They mechanic she had look at it scratched his head and told her to disconnect the anti=lock brake system!!  WHO DOES THAT????!!!  So I told her I would ask you guys.......  If you have any ideas, let me know.


Thanks guys.

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Any codes, if you just unplug the abs fuse it would be okay(no abs obviously). If you unplugged the fuse did the problem go away? If not check the brake pads and shoes. If the regular "brake" light is going on it might be low on flood which could be caused by low life on the pads.

 

[alexgtp]

check to make sure the brake pads are not down to the rivets.

this would cause the brake light to go on because there is low fluid in the resovoir..because more fluid is in the lines and calipers because of the lack of pads..

 

[12secGTP]

if after applying the brakes a grinding noise is heard, that sounds like the pads are worn down too far and the rivets for the pads are scoring the rotors... what do the rotors look/feel like?
the ABS light coming on could also be an indication of the pads worn down too far. the abs system may patially engage therefore not clamping down completely onto the rotors (due to low fluid, due to wornout pads).
I would check the pads. if they are gone that bad, you might need to replace the rotors as well if they cannot turn out the scoring from the rivets in the wornout pads.

 

[BlkJak]

Thanks for the input. I haven't actually looked at the car, she only asked me if I might know what was wrong. I'll let you guys know more since now I'll go look at it this week.


Thanks again!!!