GM Corsica/Beretta 1988-1996 Repair Guide

Window Regulator Motor

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REMOVAL & INSTALLATION



Front

See Figures 1, 2 and 3

Remove the regulator.

It is important to perform Step 2. The regulator lift arm is under tension from the counterbalance spring and can cause personal injury if the sector gear is not locked in position. Inspect the regulator for a counter balance spring. Some 1990-92 Corsica models do not use a counterbalance spring.

  1. Drill a hole through the regulator sector gear and backplate and install a screw and nut to lock the sector gear in position. Do not drill the hole closer than 1 / 2 in. (13mm) to the edge of the sector gear or backplate.
  2.  
  3. Drill out the rivets using a 3 / 16 in. drill bit.
  4.  
  5. Remove the motor.
  6.  

Depending on the position of the regulator, it may be necessary to remove portions of one of the remaining rivets later.

To install:
  1. Attach the motor to the regulator using a 1 / 4 in. x 31 / 32 in. rivets.
  2.  
  3. Once at least 2 rivets are installed, remove the screw and nut locking the sector gear in the fixed position. Use an electric power source to rotate the regulator in the desired direction to provide access to the remaining rivet.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Secure the regulator sector gear to the regulator back plate



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Fig. Fig. 2: Motor-to-rivet staking procedure



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Fig. Fig. 3: Regulator sector gear modification

It may be necessary to grind a portion off the corner of the sector gear on some models to provide space to remove the remaining rivet.

  1. Once the remaining rivet can be removed install a new one.
  2.  
  3. Install the regulator and motor assembly to the door inner panel using 1 / 4 in. 1 / 2 in. peel type rivet.
  4.  

Rear
  1. Remove the regulator.
  2.  
  3. Remove the motor by drilling out the rivets holding the motor to the actuator using a 1 / 4 in. (6mm) drill bit.
  4.  

To install:
  1. Attach the motor to the regulator using a 1 / 4 in. x 31 / 32 in. rivets.
  2.  
  3. Install the regulator.
  4.  

 
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