Question about 2002 Chevrolet Astro

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Abs light will not reset have replaced wheel sensor wires are good as i replaced speed sensor wires are good what next ??

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  • Chevrolet Master
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Cluster warning lights

Whenever this warning light or any other stays on in the dash it is indicating that the systems control module (or the system sensor in the case of lights like low oil pressure, door open indicators etc.) has detected a fault, it then disables the system (this applies to ABS,TCS, TCM, SRS, TPMS, MIL, CEL and BCM faults and others) as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Legend of Abbreviations. ABS Anti-lock brake system. TCS Traction control system, TCM Transmission control module, SRS Supplemental restraint system, BCM Body control module. TPMS Tire Pressure Monitor System, MIL Malfunction Indicator Lamp, CEL Check Engine Light.

Posted on Dec 06, 2012

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Posted on Jan 02, 2017

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SOURCE: 2006 chevy uplander 2wd shakes at all speeds while

apart from trading it in for a new model you could try changing the back wheels for the front wheels and see if this cures the wobble.the car battery is fine if its starting ok so leave that well alone as no doubt the firestone have a special on the batteries where the mechanic gets so many cans of beer for each battery sold .forget the service engine light thats their to make you take vehicle to dealer to have it done to put the light out ,change the battery in the key fob but be warned this vehicle has to be put on the dealer diagnostic machine to reset ,another wheeze to keep the dealers in business so use another battery with the wires on to hook into contacts on the key fob before you change the battery ,save about 80 euros + labour .now the ABS light ??? thinking ,could be lots of things but here you may need a local mechanic to have a look for you as the cause could be sensor on a wheel or the wheel bearing as the modern motor uses a gray paste on the back of the wheel bearing instead of a metal ring with teeth and this paste/paint can get damaged by a twig or plastic bag getting caught behind the bearing rubbing it off ,i have the teashirt for this so dont ask.see how you get on and if you need anything else just answer the reply

Posted on Oct 24, 2010

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SOURCE: My chevrolet equinox 2005 abs ligh is on. after

Theres a problem with a speed sensor at the wheels, there are four abs sensors one on each wheel and they read the wheel speed of each wheel, what is happening is that when you step on the brake the computer is reading the speeds of each wheel and sees one wheel is moving slower than the other and thinks that whell is skidding so intern its release the braks very very fast and thats the vibration you are feeling but the wheel is not skiding theres a problem with a sensor thats giving a flase reading, a scan tool will be needed to be conected to the compuetr and truck driven to see which sensor is bad or acting up, hope this is helpful. some times it can be dangerous if it keeps releasing the brakes while you are trying to stop.have this checked out.

Posted on Feb 26, 2011

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SOURCE: how to reset the ABS

i think you have metal shavings on the abs wheel sensor. did you go metal to metal on the brakes? new caliper right? disconect the battery for 10 mins that should do it. first clean that sensor off it might reset itself good luck

Posted on Sep 20, 2008

  • 248 Answers

SOURCE: All Wheel Drive Disabled

I would take it back to place where it was repaired, it is possible that the part they replace is defective..

Also they should have clear all codes in the system at that time!!!

Posted on Jan 03, 2010

  • 1 Answer

SOURCE: 2001 cavalier, abs, trac, service lights on.

I have the same ABS problem... I just had new brakes and front wheel bearings done. A couple weeks later the Service light, ABS, light and Trck off light came on. While driving on the highway it sounded like the breaks were scraping or something to that effect. In any event, there was a rather loud intermittant vibration. Is this a serious mechanical problem caused by the ABS failure?? Appreciate any help!

Posted on Mar 09, 2010

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2000 Cadillac deville brake abs trac control lights on. Code c1214 resets every time car is started after clearing.

follow the instruction and fix it. God bless you
When a wheel speed sensor (WSS) fails or there's a problem in the sensor's wiring circuit, it usually disables the ABS system and causes the ABS warning light to come on. Loss of a wheel speed signal is a serious problem because the ABS module needs accurate input from all its sensors to determine whether or not a wheel is locking up. Without this vital information, the ABS system can't do its thing.
Wheel speed sensors produce an alternating current (AC) output voltage that varies in frequency and amplitude with wheel speed. The faster the wheel turns, the greater the frequency and amplitude of the sensor's output signal. The strength of the signal can be affected by resistance in the sensor, resistance in the wiring and connectors, metallic debris on the end of the sensor, and the air gap between the sensor and tone ring mounted on the axle, hub, brake rotor, drum or CV joint.
A narrow air gap is usually necessary to induce a strong signal in the sensor's magnetic windings. Air gaps typically range from .016 in. to as much as .050 in. (0.40 to 1.3 mm) depending on the application. If the ABS warning light is on and you find a code for a wheel speed sensor (and the sensor is adjustable), the problem may be nothing more than too wide an air gap. Use a brass or nonmagnetic feeler gauge set the gap to the factory recommended specs.
Variations in the air gap can also cause fluctuations in the sensor's output signal. These may be caused by bad wheel bearings or missing, broken or chipped teeth on a tone ring. Even minor damage to the tone ring that's nearly impossible to see can sometimes cause a problem. One equipment supplier makes a test bench with a magnetic pickup and oscilloscope to check tone rings on remanufactured FWD axle shafts. The setup simulates the signal produced in a wheel speed sensor. Tests have shown that a variation in height of only about .010 inch on a single tooth can cause a noticeable fluctuation in the sensor's output signal!
One way to check a suspicious wheel speed sensor is to measure its output voltage. One way to do this is to plug a breakout box into the ABS module's wiring harness and attach the test leads from a digital volt ohm meter (DVOM) to the appropriate pins for the WSS circuit.
A good wheel speed sensor will generally produce an alternating current (AC) voltage reading of 50 to 700 MV when the wheel is spun by hand at about one revolution per second. Refer to a shop manual for the sensor's exact voltage specifications.
A low voltage reading or no reading calls for a direct measurement of the resistance in the WSS circuit (with the key off). This should be done through the breakout box to check the entire circuit. A good wheel speed sensor and circuit will typically have a resistance of 800 to 1400 ohms (specs vary, so refer to a manual for the exact numbers).
If the sensor circuit has too much resistance, reads open or is shorted (little or no resistance), measure the resistance across the sensor itself. If the sensor itself reads within specs, the problem is in the wiring or connectors. If not, then you have identified a bad sensor that needs to be replaced.


Oct 18, 2012 | Cadillac DeVille Cars & Trucks

1 Answer

I have a 1999 dodge ram 2500 with a diesel. i changed both speed sensors and my speedo dont work and my abs, light and brake light is on as well, when they run a code scanned no codes come up for the

NO code ? the first thing is to make sure all the fuse are good, the next thing is to connect a scan tool and check for readings to speed sensors.

Some of these use the wheel speed sensors to control the speedo and abs , the speed sensors in the transmission are used to control gear shifting, make sure the wheel sensors are working, the most common problems are the wiring to the rear sensor and the rear sensor itself, check on the rear end on the top and make sure connection is good and maybe replace that sensor and see what happens, i have run into this problem a few time but some were diffrent. one was a bad rear speed sensor another one was the cluster and the last was the abs module.

I would start with checking all the fuses first, then move on to replacing the rear speed sensor located on the rear top of the diffrential . good day.

May 19, 2012 | Cars & Trucks

1 Answer

Change front brakesensor saab 9-5

Step 1 - First, you must locate the malfunctioning wheel sensor. This is done by using a scan tool or multi-meter. Plug in an ABS scan tool and follow the prompts to retrieve the trouble code associated with a failed wheel speed sensor.

Step 2 - If a scan tool is not available you can use a voltage multi meter. Disconnect the wiring connector at each wheel. Next attach the meter leads to each of the ABS connector terminals that lead to the wheel sensor being tested.

Step 3 - Once the failed wheel sensor has being discovered remove the sensor mounting bolts, or remove the tire and bearing hub. (Some ABS wheel sensors are intergraded into the wheel bearing hub)

Step 4 - Next, Inspect the sensor stator ring to confirm that there is no damage existing to the ring. If the ring shows signs or damage replacement is required.

Step 5 - Then, reinstall the new sensor or wheel bearing hub and reassemble.

Step 6 - Reconnect the electrical connector.
Once the new sensor is installed the system should run tests confirming is operating normally. At this point the warning light will go out. Some systems might require a ABS scan tool to reset the system, but this not typical.

Mar 24, 2012 | Cars & Trucks

2 Answers

ABS light won't go off recently had both front wheel bearings replaced on a 1999 gmc jimmy - the ABS light came on immediately during a test run, i told the mechanic about it and i was told it would...

There are ABS wheel speed sensors on the front wheels behind the hubs. It is possible if the hub where replaced either the pick up ring mounted to the hub itself was not installed or might have purchase non abs hubs or they just did not switch the wheel speed pickup ring on the new hub. Another thing could be either the wheel speed sensors are mis adjusted or when they replaced the hubs they hung the spindle by the abs wire and either pulled it out of socket or messed up the wires internally. Here is a basic abs system if you have any other questions please let me know. Also please leave good feedback.

Jun 23, 2011 | 1999 GMC Jimmy

3 Answers

Where is the abs speed sensor on a 5 series bmw?as the abs light and traction light have both illuminated

You have 4 wheel speed sensors. There is one at each wheel located just behind the hub. You can trace it by loacting the black insulated wire leading out from the wheel well and going behind the wheel.

Mar 27, 2010 | 2001 BMW 5 Series

2 Answers

ABS and Traction light on after replacing pass

Had same problem , Replaced hub speed sensor wire to that wheel and it took care of problem, Got it on Ebay for $17,95 have to splice wires but simple job.

Mar 09, 2010 | 2002 Buick Rendezvous

2 Answers

Abs light and brake light are on. also service

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

Nov 06, 2009 | 2004 Pontiac Grand Am

1 Answer


There is a good chance that the wheel speed sensor, (ABS sensor) has gone bad or gotten to dirty. It's common for the ABS sensor to get too dirty and can not read the speed ring on the wheel hub since it's magnetic. The common repair is to spray Brake Parts Cleaner on the ABS and speed ring on the hub and inspect for damages to the wire harness. The ABS sensor is on the inside of the wheel hub so it's easy to get to, if you not sure what your looking for. Remove the wheel and along the A-arm, you will find a wire harness which leads to the wheel hub (Bearing). There is where your going to find the sensor, just clean it and inspect for corrosion and gap, you can take paper and fold it 5 times and place it between the sensor and speed ring for the proper gap. Good luck and keep me posted, if there is a Auto Zone around your area, have them scan the car just to make sure it's not your ABS modulator which would cast $$$ to replace.

Nov 02, 2009 | 1997 Buick LeSabre

2 Answers

Abs lights keep coming on? 2006 Monte Carlo. 44,000 miles. Started car this morning, antilock brake yellow light and ABS yellow light both came on. No change in braking performance I can feel. Is it under...

yes it would be under warenty go to the dealer and have them look at it if you need help after that contact me for more help. It could get expensive to fix yourself and it takes special tools to work on abs, it could be as simple as a bad wheel sensor and has to be fixed and the light reset, the dealer has a computer to test and fix it and it would be no cost to you, the only thing they would not cover is if the brakes needed replaced but the ABS would be covered, and hurry time is short for Gm.

May 28, 2009 | 2006 Chevrolet Monte Carlo

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