To find and replace them, follow these steps:
1. Locate the Wheel Speed Sensor:
* Jack up and secure the truck: Use jack stands to safely lift the truck. Never work under a vehicle supported only by a jack.
* Remove the wheel: Remove the lug nuts and take off the wheel.
* Locate the sensor: The sensor is usually mounted near the inner side of the wheel hub, often pointing towards the wheel's center. It's a relatively small, cylindrical component with a wire harness connected to it. You might need a flashlight to see it clearly. Sometimes, it's tucked behind a brake caliper or other components, so careful examination is needed.
* Consult a repair manual: A Chilton's or Haynes repair manual specific to your 1996 Ford F-150 will have diagrams showing the exact sensor location for your particular model and year. This is highly recommended as there's some variation depending on the trim level and axle configuration.
2. Replacing the Wheel Speed Sensor:
* Disconnect the electrical connector: Carefully unplug the electrical connector from the sensor.
* Remove the sensor: Depending on the type of sensor, you might need to unscrew it (common) or use a special tool to remove it. Again, your repair manual will be invaluable here. Sometimes there's a retaining clip.
* Clean the area: Clean any rust or debris from the sensor mounting location.
* Install the new sensor: Carefully install the new sensor, making sure it's seated properly. Tighten to the manufacturer's specifications (check your repair manual).
* Reconnect the electrical connector: Securely plug the electrical connector back onto the sensor.
* Reassemble everything: Reinstall the wheel, lug nuts (torque to specifications!), and lower the truck.
Important Considerations:
* ABS System: Wheel speed sensors are crucial for the Anti-lock Braking System (ABS). If you have any trouble with this system after replacing a sensor, have it professionally scanned for trouble codes to ensure proper function.
* Torque Specifications: Always tighten lug nuts and sensor mounting bolts to the correct torque specifications. Using a torque wrench is crucial to avoid damaging the components. The repair manual will provide this information.
* Safety First: Always work on your vehicle in a safe, well-lit area. Use jack stands and follow all safety precautions.
If you are not comfortable performing this repair yourself, take your truck to a qualified mechanic. Improper installation can damage the ABS system or cause other problems. The cost of a professional repair might be less than the cost of a mistake.
