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    Buick Regal 1997-2000

    Windshield Wiper Systems

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    Wiper Arms



    Removal & Installation

    The wiper arms are attached to an assembly known as the wiper transmission, sometimes also called the wiper pivot or the wiper arm shaft.

    1. Turn the ignition switch to the ACC position.
    2.  
    3. Set the wiper switch to the PULSE position.
    4.  
    5. Turn the ignition switch OFF when the wiper arm is in the innermost wipe position and not moving.
    6.  
    7. Disconnect the washer hose from the nozzle.
    8.  
    9. Remove the protective cover from the wiper arm retaining nut.
    10.  
    11. Remove the nut from the wiper arm and transmission shaft.
    12.  
    13. Remove the wiper arm from the transmission drive shaft. Use a rocking motion. In some cases, a small puller like a battery terminal puller can be used to coax to wiper arm from the transmission shaft.
    14.  



    Click image to see an enlarged view

    Fig. Disconnect the washer hose and remove the protective cap from the wiper arm



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    Fig. Remove the wiper arm retaining nut



    Click image to see an enlarged view

    Fig. Insert a suitable pin through the two holes located next to the arm pivot to hold the arm off the glass, making it easier to rock the arm back and forth and remove it from the pivot shaft

    To install:

    1. Clean any metal shavings from the knurls of the wiper transmission shafts.
    2.  
    3. Return the wiper transmission to the PARK position using the following procedure:
      1. Turn the ignition switch to the ACC position.
      2.  
      3. Set the wiper switch ON and then OFF.
      4.  
      5. Turn the ignition switch OFF .
      6.  

    4.  
    5. Install the wiper arm and position the wiper arm slightly below the stop surface of the park ramp. Push the wiper arm down slightly onto the wiper transmission drive shaft completely,
    6.  
    7. Install the wiper arm retaining nut and tighten to 17 ft. lbs. (23 Nm). Snap the cover back into place. Lubricate the washer hose with windshield wiper fluid to make it easier to connect the washer hose.
    8.  
    9. Inspect the installation. In the parked position, both wiper arm assemblies must be snug against the park ramps. Check the wipe pattern. Wet the glass and run the wipers briefly. There should be 2.17-5.20 inches (55-132mm) from the tip of the driver's side wiper blade on the outerwipe to the edge of the glass. The correct park position and outerwipe dimensions are determined with the wipers operating at low speed on wet glass.
    10.  

    Wiper Motor



    The windshield wiper/washer system consists of a permanent-magnet depressed-park wiper motor assembly, wiper/washer switch, washer solvent container with a pump, wiper arms and blade assemblies and a wiper drive system (also called a wiper transmission). The wiper drive system is installed on the vehicle as a complete assembly called a module. The wiper drive system module consists of a wiper motor assembly and wiper transmission assembly assembled on a tube frame.

    The wiper/washer system is a pulse (delay) type. Pulse timing and demand wash functions are controlled electronically. The pulse type windshield wiper/washer system includes an operating mode in which the wipers make single sweeps with an adjustable time interval between sweeps. The time interval is controlled by a solid state timer in the wiper motor cover assembly. The duration of the delay interval is determined by the delay resistor in the wiper/washer switch assembly. The length of delay time between sweeps is controlled by the variable pulse delay resistor. The delay is adjustable from 0 to 25 seconds.

    Removal & Installation
    1. Remove the wiper arms from the vehicle using the procedure found earlier in this section.
    2.  
    3. Remove the air inlet grille panel retaining screws (or plastic push-in retainers) and remove the panel from the vehicle. The panel may be in two pieces, left side and right side.
    4.  
    5. Detach the connectors from the wiper motor assembly.
    6.  
    7. Remove the three screws and the wiper drive system module from the vehicle.
    8.  
    9. The wiper motor crank arm is attached to the wiper drive by a ball-joint type connection that snaps together. GM recommends their special tool J 39232 which is a pliers-like tool with U-shaped jaws that are placed between the components. When the handles are squeezed, the jaws separate the components. Use care if using substitutes.
    10.  
    11. Remove the nut from the wiper motor crank arm.
    12.  
    13. Remove the three screws and separate the wiper motor from the tube frame.
    14.  



    Click image to see an enlarged view

    Fig. Exploded view of a typical W-Body windshield wiper motor and related components



    Click image to see an enlarged view

    Fig. Separating the wiper linkage using GM's special tool



    Click image to see an enlarged view

    Fig. Assembling the wiper linkage using GM's special tool



    Click image to see an enlarged view

    Fig. Transmission/linkage socket screw and related components



    Click image to see an enlarged view

    Fig. View of the transmission assembly



    Click image to see an enlarged view

    Fig. Use a suitable tool line up the holes in the module carrier plate and bell crank.

    To install

    1. Install the wiper motor assembly and bracket onto the tube frame with three screws. Tighten to 106 inch lbs. (12 Nm).
    2.  
    3. Install the wiper motor crank arm onto the wiper motor assembly with the nut and tighten to 18 ft. lbs. (25 Nm).
    4.  
    5. Snap together the wiper motor crank arm onto the wiper transmission. GM recommends their tool J 39529. Use care if using substitutes.
    6.  
    7. Install the wiper drive system module onto the vehicle and tighten the three screws to 106 inch lbs. (12 Nm).
    8.  
    9. Assemble the electrical connectors and verify that they are secure.
    10.  
    11. Install the air inlet grille panel. Use care to align the clearance holes to the wiper arm pivot shafts. If the grilles are in two pieces, look for a small connecting pin which aligns the two pieces and make sure it is correctly registered into its mating opening.
    12.  
    13. Install the wiper arms to the vehicle.
    14.  

    Wiper Switch



    Removal & Installation
    Dash Mounted Switches

    NOTE
    This procedure covers dash mounted switches only. For steering column mounted switches, please refer to Section 8 of this manual.

    1. Disconnect the negative battery cable.
    2.  
    3. Unfasten the screw from the instrument panel, under the switch.
    4.  
    5. Remove the assembly by carefully pulling the switch out to release the two spring clips at the top.
    6.  
    7. Installation is the reverse of the removal procedure.
    8.  

     
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