Before You Begin:
* Disconnect the battery's negative terminal: This prevents accidental short circuits.
* Gather your tools: You'll likely need a trim removal tool (plastic pry tool is best to avoid scratches), a Phillips head screwdriver, and possibly a Torx screwdriver (depending on your specific car).
* Protect your interior: Lay down some towels or blankets to prevent scratching.
Steps (General Procedure - Verify with your repair manual):
1. Remove the Door Handle: There are usually screws hidden behind the armrest or the door handle itself. You may need to carefully pry off the cover around the handle to access them.
2. Remove the Window Crank (if applicable): If you have a manual window crank, remove it after removing any screws securing the handle. This may involve pulling the knob off or unscrewing a retaining nut.
3. Remove the Door Panel's Armrest (if applicable): Often, the armrest is held in place with clips or screws. Carefully pry it loose using your trim tool, being mindful of any wires or connectors.
4. Disconnect Electrical Connectors: Locate the connectors for the power window switch, door lock, and courtesy light. Gently disconnect these connectors by pressing the release tabs. Take pictures or make notes of the connector placement before disconnecting to aid reassembly.
5. Remove the Door Panel Screws: Look for screws around the edges of the door panel. They are often hidden under small plastic caps or covers that can be removed with a trim tool.
6. Carefully Pry the Door Panel Away: Start at the bottom edge of the panel. Use your trim tool to carefully pry the panel away from the door. Work your way around the perimeter, releasing the clips that hold it in place. These clips can be brittle, so gentle pressure is key. The panel may be attached to the door by a combination of clips and screws.
7. Remove the Door Panel Completely: Once all clips are released, carefully pull the panel away from the door. Be mindful of any remaining connectors or wires.
Important Considerations:
* Clips: The most common point of failure is breaking the plastic clips that hold the door panel on. Work slowly and carefully to avoid this. Replacements are usually readily available.
* Wiring: Take your time disconnecting electrical connectors to prevent damage.
* Repair Manual: A factory service manual for your specific 1990 Oldsmobile Regency is invaluable. It provides detailed diagrams and instructions specific to your vehicle, minimizing the risk of damage.
This is a general guide. The exact procedure might differ slightly depending on the specific trim level of your Regency. Always consult a repair manual for your vehicle to avoid damaging your car. If you're not comfortable performing this task yourself, consider taking your vehicle to a qualified mechanic.
