abs wheel speed sensor problems.

[Knoitaull]

I'm having abs wheel speed problems.
I have replaced the sensor and wheel hub assembly. OBD JScan shows a LF wheel speed of 0 and wheel impulses indicate FF. I have checked the wiring and conectors, all are OK. The harness does have a y split that goes to a sensor on the left side axal tube. Could someone educate me as to what the sensor is.

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[mwilk012]

how did you check the wiring? Resistance test from module to sensor? Or did you just kind of look at it?

 

[alphawolff]

With key on you should be getting B+ voltage at the connector with both wires pinned. I suspect you are not getting this, which means you need to test the resistance of both wires between the ABS sensor and the ABS module. If both are OK replace the module.

IIRC the l/f speed sensor goes to another connector on the left side frame rail before going to the ABS module. Be sure to test at the sensor side and that frame side inline.

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