1. Check the fuse. The first thing you should do is check the fuse for the rear power window. It is located in the fuse box in the trunk. If the fuse is blown, replace it with a new one of the same amperage.
2. Check the wiring. If the fuse is not blown, the next step is to check the wiring. Look for any loose or damaged wires. If you find any, repair them.
3. Check the window regulator. If the wiring is intact, the next step is to check the window regulator. The window regulator is the mechanism that moves the window up and down. If the regulator is damaged, it will need to be replaced.
4. Check the window motor. If the window regulator is not damaged, the next step is to check the window motor. The window motor is what powers the window up and down. If the motor is damaged, it will need to be replaced.
5. Reassemble the door. Once you have repaired or replaced the damaged component, you can reassemble the door.
Here are some additional tips that may be helpful:
* When you are working on the door, be careful not to drop any screws or other small parts.
* If you are not comfortable working on electrical systems, you may want to take your car to a qualified mechanic.
* Before you start working on the door, disconnect the battery to avoid any electrical accidents.
