Tools you'll likely need:
* Socket set (metric)
* Ratchet and extensions
* Screwdrivers (Phillips and flathead)
* Pliers
* Wire cutters/strippers (if splicing wires)
* Electrical tape
* New wiper motor (ensure you get the correct part number for your vehicle)
* Shop rags or towels
* Possibly a torque wrench
Procedure (General Steps - Consult your repair manual for specifics):
1. Disconnect the Battery: This is crucial to prevent electrical shorts and injury. Disconnect the negative (-) terminal first.
2. Access the Wiper Motor: This is usually located under the cowl (the area under the windshield wipers). You'll likely need to remove the plastic cowl cover. This often involves removing wipers, various screws and clips holding the cowl in place. Your repair manual will detail the specific removal process for your Silhouette.
3. Disconnect Electrical Connectors: Carefully disconnect the electrical connectors from the wiper motor. Take photos or make notes to ensure you reconnect them correctly later. Some connectors may have locking tabs – gently release these.
4. Disconnect Linkage: The wiper motor is connected to the wiper arms via a linkage. Disconnect this linkage. This may involve removing bolts or clips. Again, your repair manual is key here as the linkage design can vary.
5. Remove the Wiper Motor: The motor is usually held in place by bolts. Carefully remove these bolts to free the motor.
6. Install the New Wiper Motor: Position the new wiper motor in place, aligning it with the mounting holes. Install the bolts and tighten them securely (but don't overtighten!). Consult your repair manual for proper torque specifications.
7. Reconnect Linkage: Reconnect the wiper linkage to the new motor. Ensure it's properly seated and functioning correctly.
8. Reconnect Electrical Connectors: Carefully reconnect the electrical connectors to the new motor, matching them to the connections you noted earlier. Secure the connectors.
9. Reinstall Cowl Cover: Carefully reinstall the cowl cover, ensuring all clips and screws are secured.
10. Reconnect the Battery: Reconnect the positive (+) terminal to the battery.
11. Test the Wiper Motor: Turn on your wipers to ensure the new motor is working correctly and the linkage is operating smoothly. Check for proper speeds and functionality.
Important Considerations:
* Repair Manual: A factory repair manual or a reputable aftermarket repair manual specifically for your 1999 Oldsmobile Silhouette is absolutely essential. This will provide detailed, vehicle-specific instructions and diagrams.
* Safety: Always disconnect the battery before working on any electrical components. Be cautious when working with sharp or potentially damaging objects.
* Splicing Wires: If any wires are damaged, you may need to splice them. Use proper crimping techniques and electrical tape to ensure a secure connection.
This guide provides a general overview. Failure to follow the correct procedure and use the appropriate tools can lead to damage to your vehicle. If you're not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic.
