Question about 2000 Pontiac Grand Am GT

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Here is a Problem for you all! 2000 Grand Am GT ram air v6 ABS and Brake light always on, No trouble codes, and no rear brakes at all key on or off. Has fluid at M/C and to ABS unit but not from unit to rear Calipers. Also when starting with foot on brake no abs and brake light, when pedal released lights come on and abs unit clunks a few times still no cpu codes.

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This problem sounds like and ABS module that has gone bad, the ABS module has toothed gears inside that actuate the ABS motor, if one of these gears slips a tooth or "unwinds" itself if will not circulate brake fluid to where it needs to go (ex: the rear brakes) alot of times the brake and ABS light will come on, but will not set any trouble codes. My recommendation is to take this to a repair shop and have them verify the problem and replace the ABS module, the motor gears have to be properly aligned when replacing or the lights will stay on and you will still have the same problem. Hope this helps.

Posted on Mar 11, 2009

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Sounds like you need a new abs unit.

Posted on Mar 11, 2009

  • Eldric Venne
    Eldric Venne Mar 11, 2009

    Sounds like you need a new abs unit.

  • Eldric Venne
    Eldric Venne Mar 11, 2009

    Sounds like you need a new abs unit.

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Go here to read files on ABS issues

http://autos.groups.yahoo.com/group/villagerquest/

  • Anti-Lock Brake Warning Indicator Always On
  • Fuse(s).
  • Circuit.
  • Hydraulic solenoid relay.
  • Hydraulic pump motor relay.
  • Brake anti-lock sensor(s).
  • Hydraulic anti-lock actuator assembly.
  • Anti-lock brake control module.
  • GO to ABS Quick Test .

QT5 PERFORM ABS TROUBLE CODE RETRIEVAL
  • Key OFF.
  • Jump Pin 4 of the data link connector to ground.

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  • Key ON.
  • Observe the anti-lock brake warning indicator.
NOTE: The first code to flash will be the start code (12). Also, each code is repeated three times before proceeding to the next trouble code.

Does the anti-lock brake warning indicator flash codes? Yes No RECORD code(s). GO to the following ABS Trouble Code Identification Chart in this section and PERFORM Pinpoint Test specified for first code retrieved. If indicator is illuminated constantly, GO to Pinpoint Test D1 . If indicator is not illuminated, GO to Pinpoint Test A1 .


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