How can i tell which wheel speed sensor is bad on my 1998 buick lesabre? also, will the light go out once a new one is installed

Question edited for clarity and spelling.
Question moved to model category.

In the link with fuse list.

Buick LeSabre (1996 - 1998) - fuse box diagram

https://www.autogenius.info > buick-lesabre-1996-1998...

Jan 25, 2017 - The driver's side fuse block is to the left of the steering wheel, under the instrument panel. Buick LeSabre - fuse box - under wheel ...

Unfortunately there is not a reset feature. You will either need to install a new lock tumbler with key sensor, or install the correct resistor in the harness to bypass the key sensor.

Very common. Bad wheel speed sensor. Read this
http://ricksfreeautorepairadvice.com/abs-light-on-traction-control-off-gm-products/

ABS light on Traction Control Off GM products Ricks Free Auto Repair Advice

TAC is traction assist control. It cycles your brakes as it thinks you are spinning your wheels or one is locked up while others are free. You probably have one bad wheel speed sensor.

Gerry

The ABS system has nothing to do with replacing the pads and rotors, the abs is anti braking system the system is designed to keep the wheels from locking up when brakes are applied hard, . you will first need to have the abs computer scanned for codes, the computer will pick up a problem in the system and turn off the system and then turn the abs light on and last it stores a code in the computer, the code will tell you what part of the system has failed. the codes or code are very helpful in pinpointing the problem. the abs system contains speed sensors on all four wheel and a anti braking module and computer, the most common reason for a abs code is a bad wheel speed sensor. this is the most common problem seen, the code for example may read something like this poXXXXX right front speed sensors.again start by getting the codes,good day.

front left wheel sensor is bad giving computer false information. replace and issue should go away.the clicking you hear is the the modulator trying to adjust the wheel speed.

Hello mobrien.
Depending on what your car is equipped with. Antilock brake systems work in conjunction with traction control.So if the antilock system has a fault, traction control will also default system off. It may also turn on low pressure in a tire if your car has that feature.
In the bearing/hub assembly on your Buick there is a sensor ring that rotates with the axle. A sensor is positioned close to that ring to read wheel speed.
A failed bearing doesn't necessarily damage the sensor, nor will a bad sensor mean the bearing is bad. But on your vehicle if one fails the assembly must be replaced as a unit.
I hope this answers your question.If you have another leave it in a comment and I will answer you.

KL

Take it to a real mechanic, not the phoney physics at the zone. The speed sensor will not respond if the car is not moving. May be an air flow sensor. They will go bad if it has ever been wet. They can be checked with a scan tool.

you will have to have the codes checked it is most likely one of the wheel speed sensors after its fixed and the codes cleared the light should go off

it is a warning that the computer has detected an error in the anti-lock braking system. it could be caused a number of different reasons, you could be low on brake fluid, or you could need new front or rear brake pads or need adjusted, there could be a loss of pressure in the system and the lines may need bled