1. Preparation:
* Disconnect the battery: This is crucial to prevent accidental short circuits.
* Gather tools: You'll likely need a trim removal tool (plastic pry tool is ideal to avoid scratching), a screwdriver (Phillips and possibly flathead), and possibly a socket set (depending on screw types).
2. Removing the Door Panel:
* Window Crank Handle (if applicable): If your car has manual window cranks, remove the crank handle. This usually involves removing a small screw or simply pulling it off.
* Door Handle: Locate the screws securing the door handle. These are usually hidden under small caps or covers. Remove these screws.
* Armrest: Many LeSabres have an armrest. Remove any screws holding the armrest to the door panel. It may also simply pop off after removing the screws holding it.
* Window Switch Panel: The power window switch panel may be attached to the door panel with screws or clips. Remove it carefully. Note the orientation of the wiring connector before disconnecting it.
* Interior Door Release Handle: This usually has a small screw or two holding it in place. Remove these.
* Locate and Remove Remaining Clips and Screws: Carefully examine the door panel perimeter. There will be several plastic retaining clips hidden along the edges. These are usually fairly easy to pry off with a trim removal tool, working your way around the panel. Start at the bottom. Be gentle to avoid breaking them. Work your way around the panel, carefully popping the clips loose with the trim tool. Do not force anything!
* Disconnect Wiring Harness: Once all the clips and screws are removed, the panel should be loose. Gently pull the door panel away from the door, being mindful of the wiring harness connected to the window switch and possibly other things like door lights. There may be connectors to disconnect to completely remove the door panel.
3. Accessing the Power Window Motor:
* Locate the Motor: Once the door panel is removed, the power window motor will be visible. It's usually located within the door itself, often behind a plastic cover or access panel.
* Remove the Motor: This usually involves removing some screws or possibly unbolting it. Take note of the motor's position and how the linkage connects to the window regulator.
* Reverse the process to reassemble.
Important Considerations:
* Take Pictures: Before you start, take pictures of everything. This will be invaluable when putting the door panel back on.
* Be Gentle: Plastic clips are easily broken. Use the trim removal tool carefully.
* Label Wires: If you disconnect any wiring harnesses, label them clearly to avoid confusion during reassembly.
* Consult a Repair Manual: A repair manual specific to your 1990 Buick LeSabre will provide detailed instructions and diagrams, making the process much easier and safer. These are often available online or at auto parts stores.
This is a general guide. The exact procedure may differ slightly based on the specific year, model, and trim level of your Buick LeSabre. Always refer to a repair manual for the most accurate instructions. If you're uncomfortable performing this repair yourself, it's best to take your car to a qualified mechanic.
