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Replace the wiring harness to abs sensor on 2002 impala ls

ABS an dtractioncontrol light ar eon in 2002 impala. Needs new sending unit or connection

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Posted on Jan 02, 2017

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BigBlue77
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SOURCE: 2002 2WD CHEVY TAHOE ABS

Its possible that right wheel speed sensor is dropping out early making the truck think that wheel is locking up. That will activate the ABS and let the brake go on the right wheel which will make the vehicle pull slightly left. The only way to know for sure is to watch the wheel speeds on a scanner and see which one is drpping out first and replacing that speed sensor/bearing assembly.

good Luck

Posted on Sep 20, 2008

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SOURCE: ABS Light and Parking brake light on

check your fuses, then check the ABS valve located beside the master cylinder and the wiring to it and finally check your speed sensor, which is located on the transmission on a 2 wheel drive and on the transfer case on a 4 wheel drive. but make sure hat your E-brake is released as it will cause these lites to come on.

Posted on Oct 09, 2008

tripletauto
  • 1450 Answers

SOURCE: 2005 Impala abs & traction control problem

The traction control works off of the abs.So when abs has problem traction is disabled. If problem started when brakes changed most likely one of these sensors. Check rear wiring and see if you can see any physical damage.

Posted on Nov 11, 2008

  • 7353 Answers

SOURCE: how do i repare a 98 chevy malibu ls abs sensor

There is no "repairing" sensors, they must be replaced. Maybe built into the wheel bearing

Posted on Feb 05, 2010

gtvernon
  • 2 Answers

SOURCE: abs light stays on and traction control stays off

abs, traction control, tire pressure monitor and fuel economy indicators all use a speed sencer in the wheel hubs, save yourself a lot of greaf and have a mechanic do a code read and test the sencers, i had the same issue and it messes up the whole system, i ended up replacing one hub assembly for about $190,
as for your transmission acting up, put the fuse back in and change the fluid, DO NOT HAVE THE TRANNY FLUSHED, JUST A FLUID CHANGE!!! if you want to drive another day. todays tranmissions are way more complex than they need to be and have many solinoids and sencers that can and do fail, good luck.

Posted on Mar 02, 2010

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1 Answer

Antiskid and abs light stays on


On many GM cars the traction and ABS lights are caused by the wire harness at the left front wheel. The problem starts out with an occasional warning that goes away when you shut it off and restart it. It eventually gets worse until it comes on every time you start the vehicle. You have to unplug the speed sensor at the left front wheel, unclip all the retaining clips that hold the harness and follow it up as far as you can. You now have to cut it and replace the wires with new ones. A whole harness with connector is available from parts stores that can be spliced in but it is a costlier option at about $35. I just used bulk 16 guage wire and replaced about an 18" section. Haven't seen an ABS light since. Wrap it up tight with weatherproof conectors and black tape. The original wires that I replaced showed no obvious signs of breakage. They were twisted together tightly and frayed inside the insulation from years of turning and stretching.

Sep 16, 2012 | 2007 Chevrolet Impala LS Sedan New Cars

1 Answer

Abs light stays on and track stays on have an emmission test coming up


The ABS (antilock brake sytem) and the "track" are interconnected. Your ABS system has generated an error code and is not working and therefore your traction control system is disabled also. In most cases it is a failed abs speed sensor located in 2 or all 4 wheels that is creating the problem. The codes and locations can be read with a scanner. Worse case scenario is your abs booster pump has failed and would need replacing if you want the ABS function to work. You can also try disconnecting the electrical cord in the front/bottom of the ABS pump and spray the connectors with an electrical parts cleaner aerosol and reconnecting. This worked for my 2002 Impala LS, just had a bad connection from one of the sensors from all the years. Your brakes are still working just no anti-lock feature.

Jun 04, 2011 | 2005 Chevrolet Impala

1 Answer

Trac off light comes on when driving. causes hard shift of auto transmisssion. howdo i fix it?


Ran into the same on a chevy lumina and impala. found that it is the wiring connections to the abs usually the fronts if you clean the up tweak the connections a little in the connectoors it usually solves the problem. if it fixes it for a while and it comes back you will either need a new harness and senors or just sensors. fixed one like that the other worked for a while then had the problem again had to replace the abs sensors on both front wheels

Sep 19, 2010 | 2002 Chevrolet Cavalier Coupe

1 Answer

I have a 2003 LS Sport Impala I have relpaced the front wheel bearings twice and have lost the humming noise but still have an issue with the ABS and traction control warning lights being on. I had it...


WHEN YOU PRESS THE BRAKE PEDAL DOES THE PEDAL SEEM TO JUMP? IF SO THE MODULE HAS SEEN A WHEEL SPEED SENSOR MPH DROP SIGNALING A BRAKE LOCK UP . OR LOSS OF WHEEL SPEED , IF THATS THE CASE THE MOST COMMON PROBLEM IS A BROKEN WIRE IN THE VEHICLE HARNESS NEAR THE WHEEL SPEED SENSOR CONNECTOR USUALLY WHERE THE HARNESS MAKES A U TURN UPWARDS .

IS THE ABS LIGHT ON ALL THE TIME ORDOES IT RESET WITH A KEY CYCLE?

FIRST OF ALL THE TRACTION CONTROLL AND THE ABS SYSTEM ARE BASICALLY THE SAME SYSTEM.

THERE SHOULD BE SERVICE CODES FOR THE MALFUNCTIONS , FIRST THING IS TO RETRIEVE ALL ABS CODES THEN MONITOR WHEEL SPEED SENSOR INPUTS WHILE DRIVING

HOPE THIS HELPS

Aug 08, 2010 | 2003 Chevrolet Impala

1 Answer

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

Jul 26, 2010 | 2001 Chevrolet Impala

1 Answer

2005 impala ls the abs light and the traction control light comes


You'll need to have the codes read from the computer. You will have a code that indicates one of the front wheel sensors is bad. This could be the case, but they are very expensive as they are built into the wheel bearing assemblies. It is more likely that the wiring harness between the frame and the part of the front spindle that holds the harness, has broken internally. It is a very common problem and can be repaired with a new wiring harness section or by tracking down the fault and repairing it.

May 31, 2010 | 2005 Chevrolet Impala

1 Answer

The abs and trac lights stay on when the engine is running. how do I fix the problem ?


Something as simple as a different tire size can cause the abs to go nuts. I even had it where the two tires were the same size. But a different brand name. Each manufacture has their own tire sizing so not all tires a equal in size. Even though it says on the side of the tire that they are the same size.

Sometimes the cooper inside the insulation of the wires going to the sensors corrodes. Especially on the front units. It reads more ohms than normal but not open and is very intermittent. However moving the wires my make it work for a while. That's why replacing bearings seems to fix the problem but it comes back after a while.

You can test the speed sensors yourself...
Front sensor specs:
956 to 1240 ohms in 41 to 110 degree weather
at least 100mV AC (NOT DC!) volts when hub is spun by hand
Rear sensor specs:
950 to 1300 ohms in 41 to 110 degree weather
At least 100mV AC (NOT DC!) volts when hub is spun by hand

Here is some information from service bulletins that could be related to the problem. The traction control, antilock brakes, and tire inflation monitor all use wheel speed sensor input.

This first bulletin seems like it could be the problem because engine movement is involved:

GM Corporate Bulletin 00-06-04-049B
This Bulletin covers a problem that can cause multiple failures, one of which is an Antilock brake problem, and covers 2000-2003 Impala and Monte Carlo built prior to 2/03.
Check to make sure the wiring harness adjacent to the AC accumulator/dryer is not rubbing against the ac accumulator chaffing through the insulation of the wires in the harness.

GM Corporate Bulletin 03-05-25-008 overview:
GM front wheel speed sensor harness replacement - 2001-2003 Buick Century, Regal; 2001-2003 Chevrolet Impala, Monte Carlo; 2001-2002 Oldsmobile Intrigue; 2001-2004 Pontiac Grand Prix
This bulletin is about inspecting the harness going to the front wheel speed sensor for wear from contact with front suspension parts.
Repair harnesses/leads are available that can be spiced onto the main harness.
2001-2003 impala & Monte Carlo – Right side - 10340313
2001-2003 impala & Monte Carlo – Left side - 10340314

SERVICE BRAKES, HYDRAULIC:ANTILOCK:ABS WARNING LIGHT
• TSB #030525008 -- INTERMITTENT/CONSTANT ANTI-LOCK BRAKING SYSTEM (ABS) MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED. *TT (NHTSA ID #10004719, OCTOBER 01 2003)

Hope helped.

Nov 05, 2009 | 2001 Chrysler Concorde

3 Answers

Anti Lock, No Traction and Service Engine Light on


The wheel speed sensors are in the wheel bearings, so they should be okay. There is a a technical service bulletin for issues with the wiring harness that sends the signal from the sensors...if the harness is damaged it will act like a faulty sensor.

Sep 21, 2009 | 2001 Oldsmobile Alero

1 Answer

2005 impala


All the hubs on the car have the abs sensor built into the hub. The abs system has to be re set to read the sensor . The rear hub bearing if noisy should be replaced. There are wiring harnesses that connect to the abs sensor. The harnesses to each of the abs sensor should be replaced.

Mar 18, 2009 | 2005 Chevrolet Impala

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