Roadmaster 1992

Windshield Wiper Systems


Removal & Installation

Wiper Motor
  1. Before servicing the vehicle, refer to the Precautions Section.
    Disconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.

    If working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.

    For vehicles equipped with OnStar (RPO UE1), with battery backup, the backup battery is a redundant power supply to allow limited ONStar functionality in the event of a main battery power disruption to the OnStar module (VCIM). Do not disconnect the main vehicle battery or remove the OnStar fuse with the ignition key in any position other than OFF. Retained accessory power should be allowed to time out or be disabled by opening the driver-s side door before disconnecting power. Disconnecting power to the module in any way while the ignition is ON or with the retained accessory power activated may cause activation of the OnStar backup battery system and will discharge and permanently damage the backup battery. Once the backup battery is activated it will stay on until it has completely discharged. The backup battery is not rechargeable and once it is activated, it must be replaced.

  3. Disconnect the negative battery cable.
  5. Remove the wiper arms and blades.

    Click image to see an enlarged view

    Fig. Wiper arm and blade assemblies-1991-1993

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    Fig. Wiper arm and blade assemblies-1994-1996

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    Fig. Cowl vent screens and related components

  7. Remove the cowl screen.
    To prevent possible windshield damage the left screen must be removed before the right screen is removed.

  9. Remove the linkage hole cover.
  11. Disconnect the transmission drive link from the motor crank arm.
  13. Disconnect the wiring
  15. Disconnect the washer hoses.
  17. Remove the motor retaining bolts.
  19. Remove the component from its mounting.

    Click image to see an enlarged view

    Fig. Windshield wiper motor and related components


To install:

Be sure to use new fasteners, as required.

Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread sealer are identified. Do not use paints, lubricants or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners.

  1. Installation is the reverse of the removal procedure.
    Be sure that the wiper motor is in the park position, see illustration.

    Click image to see an enlarged view

    Fig. Windshield wiper motor transmission and related components

  3. Using the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.