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FRONT WHEEL SPEED DESCRIPTION A speed sensor is used at each wheel. The front sensors are mounted to the steering knuckles. The OPERATION The sensors convert wheel speed into a small AC electrical signal. This signal is transmitted to the A gear type tone ring serves as the trigger mecha- nism for each sensor. The tone rings are mounted at Different sensors are used at the front and rear wheels (Fig. 1). The front/rear sensors have the same FRONT SENSOR AIR GAP Front sensor air gap is fixed and not adjustable. Only rear sensor air gap is adjustable. Although front air gap is not adjustable, it can be checked if diagnosis indicates this is necessary. Front REAR SENSOR AIR GAP A rear sensor air gap adjustment is only needed when reinstalling an original sensor. Replacement sensors have an air gap spacer attached to the sensor Sensor air gap measurement, or adjustment proce- dures are provided in this section. Refer to the front, REMOVAL (1) Raise vehicle and turn wheel outward to access the sensor. (2) Disconnect sensor wire connector at harness plug. (3) Remove sensor wire from mounting retainers. towel before removal. (5) Remove bolt attaching sensor to steering knuckle and remove sensor (Fig. 2). INSTALLATION (1) If original sensor will be installed, wipe all traces of old spacer material off sensor pickup face. (2) Apply Mopar Lock N’ Seal or Loctite t 242 on bolt that secures sensor in steering knuckle. Use new Fig. 1 Typical Wheel Speed Sensors 1 - FRONT SENSOR Fig. 2 Front Wheel Speed Sensor 1 - WHEEL SPEED SENSOR PIGTAIL TJ BRAKES - ABS 5 - 41 |