GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Optra 🢒 Brakes 🢒 Antilock Brake System 🢒 Front Wheel Speed Sensor Wiring Harness Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1290260 Size: SH
  1. Disconnect the negative battery cable.
  2. Disconnect connector from the electronic brake control module (EBCM).
  3. Remove the appropriate terminals from connector:
    4. • Right-side--terminals 4, WH, and 5, GY
    • Left-side--terminals 6, BN, and 7, L-BU

    Object Number: 1290261 Size: SH
  4. Both speed sensor harnesses break out of the antilock brake system (ABS) wiring harness just beyond the ABS connector. The right-side speed sensor harness crosses the top of the fire wall to the right-side fender area. The left-side speed sensor harness goes directly to the left-side fender area.
  5. Free the speed sensor harness from the wiring harness.
  6. Remove the front wheel speed sensor electrical connector from the retaining clamps and disconnect the harness from the sensor connector.

Installation Procedure

    Object Number: 1290262 Size: SH
  1. Install the front wheel speed sensor jumper harness.
  2. Connect the front wheel speed sensor electrical connector and secure it into the clamps.

    3. Object Number: 1290102 Size: SH
  3. Replace the jumper harness into the wiring harness.
  4. Insert the terminals into connector as they had been removed:
    5. • Right-side--terminals 4, WH, and 5, GY
    • Left-side--terminals 6, BN, and 7, L-BU
  5. Connect EBCM connector.
  6. Connect the negative battery cable.