Chrysler Full-Size Trucks 1989-1996 Repair Guide

ABS Control Module

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On 1996 models, this component was renamed the Controller Anti-lock Brakes (CAB).

TESTING

The electronic module controls all phases of anti-lock system operation. The module also differentiates between normal and anti-lock model braking.

The module monitors and processes signals generated by the system sensors at all times.

The module operating program includes a self-check routine that test each of the system components. A failure of the self-check program will cause illumination of the amber warning light. The light will also illuminate if a solenoid or other system component fails during the dynamic phase of initialization.

If a system malfunction should occur, do not immediately assume the control module is the problem. A blown system fuse, bad ground, or loss of feed voltage will cause system faults similar to a module failure.

Do not replace the module unless the scan tool verifies the module is actually at fault.

Beyond the general tests of the ABS system components listed in this section, all specific tests of this component require the use of the DRB II, or equivalent, scan tool.

REMOVAL & INSTALLATION



Pick-Ups
  1. Disconnect the negative battery cable.
  2.  
  3. Release the controller connector locking handle and remove the connector.
  4.  
  5. Remove the 2 controller mounting bolts and remove the controller from the bracket.
  6.  

To install:
  1. Install the controller in the mounting bracket.
  2.  
  3. Install the mounting bolts.
  4.  
  5. Connect the harness and lock into place with the locking handle.
  6.  

Dakotas

See Figure 1

  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the upper control harness connector from the module.
  4.  
  5. Lift the connector locking handle to release the main harness connector from the module. Rotate the handle upward to clear the connector.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Install the ABS electronic control module as shown-Dakota models

  1. Lift the connector up and out of the retaining lugs on the module.
  2.  
  3. Remove the screws attaching the module to the mounting bracket, then remove the module.
  4.  

To install:
  1. Position the module in the mounting bracket, then install the mounting screws.
  2.  
  3. Connect the main harness plug to the module. Seat the connector in the module retaining lugs, then start the connector into the module.
  4.  
  5. Rotate the connector locking handle downward into the locked position to seat and retain the connector.
  6.  
  7. Connect the upper wire harness to the module.
  8.  
  9. Connect the negative battery cable.
  10.  

 
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