Tools You'll Need:
* Screwdrivers: Phillips head and possibly flathead, depending on the specific screws used.
* Panel Removal Tools: Plastic trim removal tools are highly recommended to avoid scratching the interior.
* Socket Set: May be needed for some fasteners.
* Pliers: Needle-nose pliers can be helpful for reaching small fasteners or connectors.
* New Power Window Motor Assembly: Ensure you get the correct one for your specific door (driver's side or passenger's side).
* Possibly a Window Regulator: If the regulator is damaged, you might need to replace it along with the motor. Often they're sold together as an assembly.
Steps:
1. Disconnect the Battery: Disconnect the negative battery terminal to prevent accidental shorts.
2. Remove the Door Panel:
* Start by removing the screws securing the armrest and any other visible screws around the perimeter of the door panel.
* Carefully pry the panel away from the door using plastic trim tools. There are usually clips holding it in place. Work your way around the perimeter, releasing the clips gently.
* Be mindful of the door panel connectors (power window switches, courtesy lights, etc.). Unplug them carefully.
3. Access the Window Regulator and Motor: Once the door panel is removed, you should see the window regulator mechanism and the power window motor. The location and access vary slightly by year and door, but it's generally at the bottom of the door.
4. Disconnect the Motor:
* Disconnect the electrical connector from the motor.
* You might need to remove some screws or clips holding the motor in place on the regulator.
5. Remove the Old Motor Assembly: This may involve removing some fasteners holding the motor to the regulator. Sometimes the motor and regulator are a single unit, making this step easier.
6. Install the New Motor Assembly: Carefully install the new motor assembly, reversing the steps you took to remove the old one. Make sure everything is securely fastened.
7. Reconnect the Electrical Connector: Ensure the electrical connector is securely plugged into the new motor.
8. Reinstall the Door Panel: Carefully align the door panel and re-attach it, ensuring all clips are properly engaged and all screws are tightened.
9. Reconnect the Battery: Reconnect the negative battery terminal.
10. Test the Window: Test the power window to make sure it works correctly.
Important Considerations:
* Consult a Repair Manual: A repair manual specific to your 1995 Mercury Grand Marquis is highly recommended. It will provide detailed diagrams and instructions for your specific vehicle, making the process much easier and less prone to error.
* Window Regulator Condition: Inspect the window regulator while you have the panel off. If it's damaged or shows signs of wear, replace it along with the motor. A failing regulator will often render a new motor useless.
* Patience: This is not a quick job. Take your time and be careful not to break any plastic clips or damage the door panel.
If you're uncomfortable with any of these steps, it's best to take your vehicle to a qualified mechanic. Attempting this repair without the proper knowledge and tools could lead to further damage.
