Abs light will not go off change both rear sensors

can be front sensors --bad hub --damaged harness or or abs unit failing

left front wheel sensor is not reading replace wheel speed sensor

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.

The ABS and BRAKE warning lights are on in the cluster because there is an active fault in the ABS module. The speed sensors that you have replaced are not direct inputs to the instrument cluster. Your truck should have one or possibly two front wheel speed sensors and one speed sensor in the rear diff. These are all direct inputs to the ABS module which are then calculated and sent out on the "bus" communication wire which is read by the cluster. It would be much easier to diagnose this problem by knowing what the active codes are in the ABS module.

If the ABS (and likely the traction control) light came on at the same time that the speedometer stopped working, you likely have a faulty wheel speed sensor at the right rear wheel. You can test this by swapping the two rear wheel speed sensors (ABS sensors). If the speedometer then works (but the ABS & Traction control lights stay on), replace the sensor that is now at the left rear (was at the right rear). If no change, you may have a fault in the ABS & Traction control - control unit.

Rear wheel speed sensor at www.bavauto.com

http://www.bavauto.com/shop.asp?HC1=0&Htarget=search.asp&HCY=2001&HCM=330i&SearchStr=rear%20abs%20sensor

if this has rear abs,the sensor on the rear axle housing might be bad.low brake fluid can also cause the abs light to come on.check the resistance of the rear abs sensor.if it reads more than 100 ohms,or is open,replace it.

you have a problem with a wheel speed sensor or abs ecm/pump motor have the code checked to see where the problem is. you still have normal brakeing just no antilock brakes

sensor in rear diff may need replaced

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.

replace the left front wheel hub assy. with 4 wheel abs. The spedometer works off of the left front wheel sensor. It will fix the abs/brake light and the spedometer will start working