Here's a general outline. Specifics may vary slightly depending on your vehicle's trim level and condition. Always consult a repair manual specific to your year and model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
1. Interior Panel Removal:
* Remove the door panel: This usually involves removing screws around the armrest, door handle, and possibly under the window crank or switch panel. There might be plastic clips holding parts of the panel in place; carefully pry these loose using plastic trim tools to avoid scratching the panel. Once all fasteners are removed, the panel should come off.
* Locate the window regulator and motor assembly: With the door panel removed, you should see the window regulator mechanism and the motor attached to it.
2. Accessing the Window Motor:
* Disconnect the electrical connector: Unplug the electrical connector from the window motor.
* Remove the window regulator: This step is crucial and varies considerably depending on the design of your regulator. Some regulators are simpler to detach than others. You might need to:
* Remove the window: Lower the window completely before starting. Sometimes, you may need to partially or fully detach the window from the regulator to access the motor. Be extremely careful, as the window can be heavy and easily damaged.
* Detach the linkage: The motor is likely connected to the regulator via a linkage. You may need to disconnect this.
* Unbolt the motor: The motor will be secured to the regulator with bolts or screws.
3. Removing the Motor:
* Once the linkages and connections are disconnected and bolts are removed, carefully remove the motor from the regulator.
4. Reassembly (Reverse of Disassembly):
* Carefully reassemble the regulator and motor, ensuring that everything is properly connected and aligned.
* Reinstall the window, making sure it's smoothly operating before you put everything back together.
* Reattach the door panel.
Important Considerations:
* Rust and seized parts: On a vehicle this age, rust and seized parts are common. Penetrating oil (like PB Blaster) can help loosen bolts and fasteners. Be patient and gentle to avoid stripping threads.
* Window Regulator Condition: While you're in there, inspect the window regulator for wear and tear. It's often wise to replace it if it shows signs of damage since you're already taking the door apart.
* Professional Help: If you're uncomfortable with any part of this process, consider seeking professional help from a mechanic. Improper disassembly can cause damage to the window, regulator, or door panel.
Remember to consult a repair manual specific to your 2002 Mercury Mountaineer for detailed instructions, diagrams, and torque specifications. These instructions are a general guide and may not cover every specific detail for your vehicle. Taking pictures as you disassemble will help with reassembly.
