Repairing this usually involves replacing the regulator. Here's a breakdown of the process:
1. Diagnosis (Important before buying parts):
* Check the switch: Before assuming it's the regulator, make sure the window switch isn't faulty. Try the switch in other doors (if possible) to see if it's working correctly.
* Check the wiring: Visually inspect the wiring harness leading to the door. Look for any damaged, frayed, or disconnected wires. A simple break in the wiring could cause this. A multimeter can confirm continuity.
* Manually test the regulator: Try to lift the window manually (carefully!) If you can't move it at all, it strongly suggests the regulator is the problem.
2. Parts:
* Power Window Regulator: You'll need a replacement regulator specifically for a 2001 Ford Focus left rear door. You can find these online (e.g., Amazon, eBay, auto parts stores) or at your local auto parts store. Ensure you get the correct part number for your year and model.
3. Repair (This requires some mechanical skill):
This process involves removing the door panel, accessing the regulator, and installing the new one. Detailed instructions vary slightly depending on the specific door panel design and type of regulator, but the general steps are:
* Remove the interior door panel: This typically involves removing screws, carefully prying off clips (use plastic tools to avoid scratching), and disconnecting electrical connectors for the window switch, power lock, and speakers. Many online tutorials show how to do this for a 2001 Ford Focus. Search YouTube for "2001 Ford Focus rear door panel removal"
* Access the regulator: Once the panel is off, you'll see the window regulator mechanism.
* Disconnect the window motor: This usually involves disconnecting a few connectors.
* Remove the old regulator: This can be tricky; some regulators are held in place with screws, while others might require more careful manipulation. Take photos as you go to help with reassembly.
* Install the new regulator: Carefully install the new regulator, ensuring everything aligns correctly.
* Reconnect the window motor: Attach all the connectors securely.
* Reinstall the door panel: Carefully reattach the door panel and reconnect the electrical components.
* Test the window: Try operating the window to ensure it works correctly.
Important Considerations:
* Safety First: Disconnect the negative battery terminal before starting any electrical work.
* Patience: This is a time-consuming job, requiring patience and careful attention to detail.
* Online Tutorials: YouTube and other online resources have many videos showing the process of replacing a window regulator in a 2001 Ford Focus. Watching a few videos before starting will be immensely helpful.
* Professional Help: If you're not comfortable working on your car, it's best to take it to a qualified mechanic.
This is a general guide. Always refer to a repair manual or online tutorials specific to your 2001 Ford Focus for precise instructions and diagrams. Failure to follow proper procedures could lead to damage to your vehicle or personal injury.
