* Window Regulator: This is the system of rollers, tracks, and cables that physically moves the window up and down. Over time, these components can wear out, break, or become misaligned. This is the most common cause of a window that won't stay up. You might hear grinding or clicking sounds if this is the problem.
* Window Motor: This is the electric motor that powers the regulator. If the motor is faulty, it won't be able to provide the power needed to raise the window, or it might intermittently work.
* Wiring/Connectors: A less common but possible issue is a broken wire or a corroded connector in the wiring harness that leads to the window motor or regulator. This can interrupt the power supply.
* Switch: Although less likely to cause the window to completely fail to stay up, a faulty window switch could be a factor. Try testing with the other window switches if possible. However, if other windows work fine, this is probably not the cause.
Troubleshooting Steps:
1. Inspect Visually: Carefully look at the window and try to see if anything is obviously broken or out of place in the track or around the motor. Look for any broken or frayed wires.
2. Listen for Sounds: When you try to raise the window, listen closely. Grinding noises usually indicate a regulator problem. Clicking might point to a motor or connector issue.
3. Check the Fuse: Consult your owner's manual to locate the fuse for the power windows and check if it's blown.
4. Test the Switch (with caution): Try using the driver's side window controls to raise the rear window. If it works from the driver's side but not the passenger's side, then the passenger's switch is likely faulty.
If you're not comfortable working on car mechanics yourself: It's best to take your Alero to a qualified mechanic. Replacing the regulator is often a moderately involved repair, requiring some disassembly of the door panel.
In short: The regulator is the most likely culprit, followed by the motor. A visual inspection and listening for sounds will give you the best clues. If unsure, seek professional help.
