Another 99 Explorer ABS Question

[thackergst]

I did a search on my diag fault code and this forum came up. I read the post regarding my code, but it didn't exactly answer the question I had.

I am in the Air Force and I am stationed in the UK. I have an ABS light on so I took it to a dealer to have it diagnosed.

The initial diag returned three codes, c1230, c1155 and c1102. The mechanic turned the light off to clear the "road faults". The only code that returned was c1230 (Wheel speed sensor rear center input circuit failure).

The possible faults are:
1. Open Circuit
2. Short to powr
3. Short to ground
4. Disconnected harness connectors
5. Sensor faulty
6. Possible ABS module fault

Because of the differences between British and American spec Fords, he told me would have to use trial and error to find/fix the problem - which could get very expensive in the UK paying by the hour.

Anyway, I was hoping to recieve some advice in correcting the issue myself.
Thank you for your time.

Gary

[way2old]

About 90% of the time if you have a code for a sensor, it is the sensor itself. The one in the top of the rear end housing will pick up little pieces of metal that come off the gears ans will give an erroneous reading. If you have a multimeter, jack the vehicle up place jackstands under all 4 corners, disconnect the speed sensor, and ohm the sensor. It should be somewhere around 1.118 kohms. Then with meter hooked up, switch to ac voltage and watch voltage as the vehicle is started ans placed in gear. Slowly run it up to about 30 mph, and look for a steady increase in voltage

[thackergst]

Thanks for your quick response way2old. I took your advice and went across the sensor with an ohm meter. Nothing! Wide open. The sensor is dead. Shorting the leads from the control module makes the ABS light go out. I'll order a new rear sensor tonight..

Thanks so much.

Gary

[way2old]

Glad it helped.