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Anonymous Posted on Jan 09, 2018

Grand am abs trac control I have a 2002 grand am 3.4l I have replaced the wheel bearings and front brakes and one of the brake calapers the abs light is an with the trac control and the service vehic lights are on I am going to fix this myself can someone tell me what to look for

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Joe Salvino

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  • Posted on Jan 09, 2018
Joe Salvino
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Most likely that one of the ABS Wheel Sensors is disconnected or got damaged during repairs that you made. Check connectors for ABS wheel sensors at front brakes. If look ok, you need to check computer codes to know which sensor is damaged and replace sensor.

5 Related Answers

Anonymous

  • 3 Answers
  • Posted on Jun 29, 2009

SOURCE: got new brakes but my abs service vehical soon

Most likely one or more bad wheel sensors. Very common problem on this car. However, you have to replace the entire hub assembly as it comes with the sensor attached.

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Anonymous

  • 1 Answer
  • Posted on Nov 28, 2009

SOURCE: abs light and trac off light on

hey, ihad this problem with abx and trac off light on all the time even after having replaced the wheel bearing twiice. how i fixed it was to replace the wiring harness and poof issue resolved. a technical service bulletin is available for this issue

john h

  • 29494 Answers
  • Posted on Jul 26, 2010

SOURCE: 2001 impala- Traction, Abs, Brake lights on

abs sensor is built into hub[bearing]common problem when changing them and or brakes r that the sensor connection is not properly reconnected or wire got damaged recheck the sensor wiring and that connector is connected to clip by strut clip is part of system

Anonymous

  • 1 Answer
  • Posted on Aug 29, 2010

SOURCE: abs light and brake light are on. also service

abs an trac control light on replaced abs wheel sensor lights still on

allobd2

  • 1207 Answers
  • Posted on Jul 17, 2012

SOURCE: why won't the abs trac and service engine soon lights go off?

may be the fault codes still exist in your service system.
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I have a 2004 grand am and the ABS,trac off and service veh.soon dash lights are still on. I have replaced the front two hub wheel bearings and have all new brakes on. I still hear a grinding noise in the...

Were you able to read the ABS trouble codes? I have pasted the codes below. You might want to check the torque on the wheel bearing bolts and axle nut.

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Check your rear brakes and inside the rear Rotors. There are ABS scanners and if Autozone or Oreillys have that type of scanner, they will scan for free.

Because the Trac Control is on the Rear axle all of your problems are probably rearward. What usually happens is the Emergency brake material and the Rotor pads wear down and blind the sensors. Sometimes the Trac Control will destroy the brake linings. The Trac Control works by applying the rear brake to the fastest spinning wheel in an effort to match each rear wheels speed.

When the sensors have debris flying in front of them, they miscount and include the debris in figuring RPM. Someone needs to disassemble and inspect the back brakes.
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First thing I would check if brakes were installed is that the abs wires did not accidentally get disconnected. If that did not occur you will need a scan tool to determine why the abs light came on. It is probably due to a bad wheel speed sensor.The trac light is on because currently your abs is disabled and the traction control requires use of the abs system to function.
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You can test the wheel speed sensors by unhooking the connectors and put ohmeter test leads on the sensor terminals should read around 1100-1600 ohms also the connectors themselves were bad for wires breaking inside the insulation at the connectors from flexing when the wheel is turned back and forth..Note excessive wheel bearing noise from bad bearings have also been known for interferring with clean abs signal also causing abs codes good luck
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I'm sorry to say that you will need to see a dealer or repair shop so they scan your ABS for trouble codes first and then find your problem.
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I will bet money that it is the ABS/TRACS module. It is mounted under the master cylinder on the bottom of the ABS unit. These are very, very, very common failures. I have replaced hundreds of them in my career. To answer your other question, the TRACS system uses brakes. For example: in the snow, when the L or R wheel is spinning faster than the opposite, the TRACS will apply brake to the spinning wheel to slow it down to an equal speed. Hope this helps.
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