GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

ABS Hydraulic Modulator Assembly

Print

REMOVAL & INSTALLATION



See Figure 1

To avoid personal injury, use the Tech I scan tool or equivalent to relieve the gear tension in the hydraulic modulator. This procedure must be performed prior to removal of the brake control and motor assembly.

  1. Disconnect the negative battery cable.
  2.  
  3. Unplug the 2 solenoid electrical connectors and the fluid level sensor connectors.
  4.  
  5. Unplug the 6-pin and 3-pin motor pack electrical connectors.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: The hydraulic modulator assembly is secured to the master cylinder

  1. Wrap a shop towel around the hydraulic brake lines and disconnect the 4 brake lines from the modulator.
  2.  

Cap the disconnected lines to prevent the loss of fluid and the entry of moisture and contaminants.

  1. Remove the 2 nuts attaching the ABS hydraulic modulator assembly to the vacuum booster.
  2.  
  3. Remove the ABS hydraulic modulator assembly from the vehicle.
  4.  

To install:
  1. Install the ABS hydraulic modulator assembly to the vehicle. Install the 2 attaching nuts and tighten to 20 ft. lbs. (27 Nm).
  2.  
  3. Connect the 4 brake pipes to the modulator assembly. Tighten to 13 ft. lbs. (17 Nm).
  4.  
  5. Engage the 6-pin and 3-pin electrical connectors and the fluid level sensor connector.
  6.  
  7. Properly bleed the system.
  8.  
  9. Connect the negative battery cable.
  10.  

 
label.common.footer.alt.autozoneLogo