2G Anti-Lock light on Help

[02HtownSubie]

I have read threads about anti-lock light and only end up with confusion.

The light is on as the car start and stay on. What steps should I follow to diagnosis? Where is the sensor located? front wheels left or right, back wheels? Over all the car is running and braking fine. It is just the fact the light is annoying.

 

[viperlp01]

i believe there is one on all wheels. Look into your wheel well and your notice that group of wires that come down and is bolted to the main control arm. That is the abs stuff. And it is expensive to replace those. Just letting you know. My light is on and i really don't bother. I am reading a code but it dosen't show up on my logger so im ok with it

 

[Artago]

My ABS light came on just before my transfer case seized... check your transfer case fluid level just to be sure.

Tom.

 

[02HtownSubie]

ok I decided to left up the car a bit and craw under there to check. Visually I can see the sensor for each wheel however I have a question. There's a ring like with teeth, seems to be in two pieces or broken. Anyone knows if it suppose to be one ring of teeth, two or several?
The front seems to be one and the back seems to be in two pieces.

 

[turbobird14]

ok... the wheel speed sensors that effect the abs act like a hall effect switch (basically a fancy magnet that detects when metal passes by it) what happens is that toothed wheel has splines on it and when they pass by the switch the switch relates the imput to the abs module. (when the tooth is right on the switch it jumps up the voltage, when the gap is right on the switch there is low voltage)... basically like an on/off. this is what is used control your abs... think of when you slide or lock the tires up.... if some of the other sensors are reading on/off...on/off.... and you have one wheel not going anywhere (1 constant reading of voltage...no switching)... it detects it.... ANYWAY... to make a long story short that ring should be a solid spline pattern all the way around. that gives the sensors the input they need. i would replace that... cause as long as your abs light is on... the abs will be inoperative! hope that helps

 

[02HtownSubie]

Do I have to replace the whole hub wheel bearing with the ABS splines or I can just replace the ABS splines? Is that two separate piece?