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Home >> Ford >> 1997 >> Expedition 4.6 W, RWD >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System - 4-Wheel >> Intermittent Failures >> Sensor Failure Test >> Check Sensor Pigtail

Check Sensor Pigtail

  1. Enable maximum resistance hold feature. Monitor resistance between suspect wheel speed sensor terminals while wiggling pigtail. See SENSOR MAXIMUM RESISTANCE  table. If resistance does not remain within specification, replace sensor.
    SENSOR MAXIMUM RESISTANCE

    Sensor Resistance (Ohms)
    Front
    2WD 4000
    4WD 500
    Rear 1500
  2. Enable minimum resistance hold feature. Monitor resistance between suspect wheel speed sensor terminals while wiggling pigtail. See SENSOR MINIMUM RESISTANCE  table. If resistance does not remain within specification, replace sensor.
    SENSOR MINIMUM RESISTANCE

    Sensor Resistance (Ohms)
    Front
    2WD 2000
    4WD 300
    Rear 900
  3. Monitor resistance between ground and suspect wheel speed sensor terminals while wiggling pigtail. If meter indicates anything but an open circuit, replace sensor.
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