GM Full-Size Trucks 1988-1998 Repair Information

Windshield Wiper Motor

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REMOVAL & INSTALLATION



1988-91 R/V Series

See Figure 1



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Fig. Fig. 1: Windshield wiper motor mounting-1988-91 R/V series

  1. Make sure the wipers are parked.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Disconnect the wiring harness at the wiper motor and the hoses from the washer pump.
  6.  
  7. Reach down through the access hole in the plenum and loosen the wiper drive rod attaching screws. Remove the drive rod from the wiper motor crank arm.
  8.  
  9. Remove the wiper motor attaching screws and the motor assembly and linkage.
  10.  
  11. To install, reverse the removal procedure.
  12.  

Lubricate the wiper motor crank arm pivot before reinstallation.

Except 1988-91 R/V Series

See Figures 2 through 7



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Fig. Fig. 2: Remove the cowl vent grille



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Fig. Fig. 3: Disengage the wiring connector from the motor

  1. Disconnect the negative battery cable.
  2.  
  3. Pivot the wiper arm away from the windshield, move the latch to the open position and lift the wiper arm off of the driveshaft.
  4.  
  5. Remove the cowl vent grille.
  6.  
  7. Unplug the wiring connector from the motor.
  8.  
  9. Remove the drive link-to-crank arm fasteners and slide the links from the arm. Do not remove the arm!
  10.  
  11. Remove the motor mounting bolts and lift the motor out.
  12.  

To install:
  1. Install the motor and tighten the bolts to 62 inch lbs. (7 Nm).
  2.  
  3. Install the drive link-to-crank arm fasteners and slide the links onto the arm.
  4.  
  5. Attach the wiring connector into the motor.
  6.  
  7. Install the cowl vent grille.
  8.  
  9. Install the wiper arm and move the latch to the closed position.
  10.  
  11. Connect the negative battery cable.
  12.  



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Fig. Fig. 4: Remove the drive link-to-crank arm fasteners



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Fig. Fig. 5: Slide the links from the arm



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Fig. Fig. 6: Remove the motor mounting bolts



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Fig. Fig. 7: Remove the motor from the vehicle

 
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