Question about 1999 Pontiac Grand Am GT
Either your ABS controller has problems, or (more likely) one or more wheel speed sensors is damaged or faulty. Most of the time the wheel speed sensors are mounted into the hubs of the car, behind the rotors. It's a very easy location for them to be damaged by road debris or fouled by exposure to the elements.
Posted on Aug 14, 2008
Probably the hydraulic modulator. I had the same problem but my regular brake light was on also. I found they are expensive and some places will rebuild it for $500. I found one at a junk yard for $75 and has worked great ever since. It is located under the battery and is easy to replace.
Posted on May 02, 2009
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Posted on Jan 02, 2017
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