Tools You'll Likely Need:
* Socket set: Various sizes, likely including 10mm, 13mm, and possibly others.
* Ratchet and extensions: To reach fasteners in tight spaces.
* Screwdrivers: Phillips and flathead, various sizes.
* Pliers: Needle-nose and possibly slip-joint.
* Wrench: Possibly an open-end or combination wrench.
* New wiper motor: Ensure you get the correct part for your 1997 Grand Marquis.
* Shop rags or towels: To keep things clean and protect surfaces.
* Possibly a plastic trim removal tool: To avoid scratching the plastic parts.
Steps (General Outline - Refer to 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 usually involves removing the wiper arms (after disconnecting the linkage), the cowl (the plastic cover under the windshield wipers), and potentially some other trim pieces. The motor is typically located under the cowl, near the base of the windshield. Your repair manual will show you exactly where it is and what needs to be removed.
3. Disconnect Electrical Connections: Carefully unplug the electrical connector(s) from the wiper motor. Take pictures before disconnecting to help you remember how to reconnect everything later.
4. Disconnect Linkage: The wiper motor is connected to the wiper arms via a linkage. Disconnect this linkage carefully. Again, photos are helpful here.
5. Remove the Wiper Motor: This often involves removing several bolts or nuts holding the motor in place. Be mindful of the location and orientation of the motor to avoid damage.
6. Install the New Wiper Motor: Reverse the removal process. Carefully align the new motor and secure it with the bolts/nuts.
7. Reconnect Linkage: Reattach the wiper linkage, ensuring it's properly aligned.
8. Reconnect Electrical Connections: Plug the electrical connectors back into the new motor, making sure they are securely seated.
9. Reinstall Cowl and Trim: Put everything back together, ensuring all fasteners are tightened to the correct torque specifications (found in your repair manual).
10. Reconnect Battery: Reconnect the positive (+) terminal last.
11. Test the Wiper Motor: Turn on the wipers and check their operation. They should work smoothly and effectively across all speeds.
Important Considerations:
* Repair Manual: A repair manual specific to your 1997 Mercury Grand Marquis is invaluable. It will provide detailed diagrams, torque specifications, and troubleshooting tips.
* Safety: Always disconnect the battery before working on any electrical components. Be careful not to drop any small parts into the engine compartment.
* Patience: This is not a quick job. Take your time and be methodical.
* Professional Help: If you're not comfortable working on your car, it's always best to take it to a qualified mechanic.
This is a general guide. The exact steps and tools required might vary slightly depending on your specific vehicle. Refer to your repair manual for precise instructions. Failing to do so could lead to damage or injury.
