Disclaimer: Working on car mechanics carries risk. If you're uncomfortable with any of these steps, take it to a professional. Improper repair can lead to further damage.
Steps (General Outline - Consult your repair manual for specifics):
1. Door Panel Removal: You'll need to remove the interior door panel. This usually involves unscrewing screws (often hidden under covers or armrests), carefully prying off clips, and disconnecting electrical connectors (window switch, power lock, etc.). Take photos as you go to help with reassembly.
2. Window Regulator Access: Once the door panel is off, you'll see the window regulator mechanism. This is the assembly that moves the window up and down.
3. Cable Assessment: Examine the cables carefully. Determine where they've come loose or broken. You'll likely see the cable attached to a pulley system.
4. Rewinding (The Tricky Part): This is where it gets specific to your vehicle's regulator design. Some regulators have a simple spool that you can manually rotate to rewind the cable. Others may be more complex, possibly requiring the use of pliers or other tools to carefully grip and rotate the cable drum. This is the step most likely to vary considerably between different window regulator designs. Your repair manual will show you precisely how to rewind the cable for your specific model.
5. Cable Reattachment: Once the cable is rewound, you'll need to carefully reattach it to its proper points on the regulator and window mechanism. Make sure everything is seated correctly and securely. If the cable is broken, you'll need a replacement cable or a complete window regulator assembly.
6. Reassembly: Carefully reassemble the door panel, ensuring all clips and screws are securely in place and all electrical connectors are properly reconnected.
7. Testing: Test the window operation. If it works correctly, you're done. If not, you'll need to re-examine your work to find any errors.
Important Considerations:
* Repair Manual: A repair manual is essential. It will show you exactly where screws are located, how to disconnect parts, and the correct procedure for rewinding your specific window regulator.
* Replacement Parts: If the cable is broken, you'll need a replacement. A new window regulator assembly might be a more cost-effective solution than trying to repair a severely damaged one.
* Patience: This is a time-consuming task. Take your time and work carefully to avoid damaging any parts.
* Tools: You will need the right tools for the job, which might include screwdrivers (Phillips and flathead), trim removal tools, pliers, and possibly a ratchet.
Again, seeking professional help if you are not comfortable with this repair is always recommended. The cost of a professional repair might be less than the cost of accidentally damaging additional parts during a DIY attempt.