GM Corvette 1984-1996 Repair Guide

Speed Sensors

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REMOVAL & INSTALLATION



Front
1986-90 VEHICLES

See Figure 1

Keep the replacement wheel speed sensor in its packaging until right before installation.

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle, then remove the wheel and tire assembly.
  4.  
  5. Detach the sensor wiring harness connector from the ABS wiring harness connector. Unclip the connectors from the bracket and separate.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: The front wheel speed sensor is mounted in the front knuckle

  1. Remove the sensor wiring harness with the grommets from the remaining brackets. Make sure to note the position of the grommets and harness routing for installation.
  2.  
  3. Unfasten the sensor retaining bolt, then remove the sensor from the knuckle.
  4.  
  5. Clean all sealant from the sensor and sensor opening in the knuckle.
  6.  
  7. Check the front sensor O-ring and spacer for damage and replace as necessary.
  8.  

To install:

The wheel speed sensors are a tight fit into the knuckle and must be pushed in by hand. Do NOT hammer the sensor into position. There are 4 individual wheel speed sensors that must be installed in the proper locations. Each replacement wheel speed sensor is identified with a white tag, located near neck of the sensor and labeled L or R. You must apply an anti-corrosive sealant to the sensor prior to installation to avoid galvanic corrosion.

  1. Properly position the O-ring and spacer, then install the coated sensor into the knuckle.
  2.  
  3. Install the retaining bolt and tighten to 86 inch lbs. (10 Nm).
  4.  
  5. Place the sensor wiring harness with the grommets into the brackets. Make sure to route the wiring and place the grommets as noted during removal.
  6.  
  7. Plug the sensor electrical connector into the ABS wiring harness connector and make sure the connection is tight. Snap the connectors into the bracket.
  8.  
  9. Install the tire and wheel assembly.
  10.  
  11. Carefully lower the vehicle, then perform the ABS system check, as outlined in the accompanying chart.
  12.  

1991-95 VEHICLES

On these vehicles, the front wheel speed sensor is integral with the wheel hub and bearing. Refer to Suspension & Steering for removal and installation procedures.

Rear
1986-95 VEHICLES

See Figures 2, 3, 4, 5 and 6

  1. Disconnect the negative battery cable.
  2.  
  3. Raise and safely support the vehicle, then remove the wheel and tire assembly.
  4.  
  5. Detach the sensor wiring harness connector from the ABS wiring harness connector. Unclip the connectors from the bracket and separate.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: The rear wheel speed sensor is mounted on the top of the rear knuckle

  1. If necessary, remove the bracket and bolt from the knuckle.
  2.  
  3. Remove the sensor wiring harness with the grommets from the remaining brackets. Make sure to note the position of the grommets and harness routing for installation.
  4.  



Click image to see an enlarged view

Fig. Fig. 3: Detach the wheel speed sensor connector, and unroute it from all of its retaining clips



Click image to see an enlarged view

Fig. Fig. 4: View of the rear wheel speed sensor wire harness routing

  1. Unfasten the sensor retaining bolt, then remove the sensor from the knuckle.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: Unfasten the rear wheel speed sensor mounting bolt ...



Click image to see an enlarged view

Fig. Fig. 6: ... then remove the sensor from the knuckle

  1. Clean all sealant from the sensor and sensor opening in the knuckle.
  2.  

To install:

The wheel speed sensors fit tightly into the knuckle and must be pushed in by hand. Do NOT hammer the sensor into position. There are 4 individual wheel speed sensors that must be installed in the proper locations. Each replacement wheel speed sensor is identified with a white tag, located near neck of the sensor and labeled L or R. You must apply an anti-corrosive sealant to the sensor prior to installation to avoid galvanic corrosion.

  1. Install the coated sensor into the knuckle, then install the retaining bolt and tighten to 86 inch lbs. (10 Nm).
  2.  
  3. Place the sensor wiring harness with the grommets into the brackets. Make sure to route the wiring and place the grommets as noted during removal.
  4.  
  5. If removed, install the bracket and bolt to the knuckle. Tighten the bolt to 86 inch lbs. (10 Nm).
  6.  
  7. Plug the sensor electrical connector into the ABS wiring harness connector and make sure the connection is tight. Snap the connectors into the bracket.
  8.  
  9. Install the tire and wheel assembly.
  10.  
  11. Carefully lower the vehicle, then perform the ABS system check, as outlined in the accompanying chart.
  12.  

 
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