GM Corsica/Beretta 1988-1996 Repair Guide

ABS Hydraulic Modulator Assembly

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REMOVAL & INSTALLATION



See Figure 1


CAUTION
To avoid personal injury, use the Tech 1®, or equivalent scan tool 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. Detach the 2 solenoid electrical connectors and the fluid level sensor connector.
  4.  
  5. Unplug the 6-pin and 3-pin motor pack electrical connectors.
  6.  
  7. Wrap a shop towel around the hydraulic brake lines and disconnect the 4 brake lines from the modulator.
  8.  

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.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the ABS hydraulic modulator mounting

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. Uncap and connect the 4 brake pipes to the modulator assembly. Tighten to 13 ft. lbs. (17 Nm).
  4.  
  5. Attach the 6-pin and 3-pin electrical connectors and the fluid level sensor connector.
  6.  
  7. Properly bleed the brake system.
  8.  
  9. Connect the negative battery cable.
  10.  

 
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