* Window Regulator: This is the most common culprit. The regulator is the mechanical part that actually moves the window up and down. Over time, the cables can fray, break, or the motor can wear out. This is especially likely given the previous owner said it never worked.
* Window Switch: While you say the other door controls work, the passenger window switch itself could be faulty. It's less likely than the regulator, but possible. Sometimes they only fail partially.
* Wiring: A break or short in the wiring harness running to the passenger window motor is possible. This is less likely if the other functions on the door work fine, but still possible. The harness is susceptible to wear and tear, especially around the flexible points.
* Fuse (less likely): While less probable given the other door controls work, a blown fuse specifically for the passenger window (if there is one) is a possibility. Check your owner's manual for the fuse box diagram.
Troubleshooting Steps:
1. Check the Fuse: This is the easiest first step. Check your owner's manual for the fuse box location and diagram. Look for a fuse related to the power windows or specifically the passenger window (some cars have individual fuses for each window).
2. Inspect the Window Switch: Carefully examine the passenger window switch. Does it feel different from the driver's side switch? Is there any visible damage? Try tapping it gently while attempting to operate the window. A temporary fix might reveal a loose connection. However, a faulty switch usually completely fails, rather than intermittently work.
3. Listen for Motor Noise: With the switch pressed, listen carefully near the door panel. Can you hear any clicking or whirring sounds from the window motor? No sound usually points to a problem with the motor itself, the regulator, or the wiring. A clicking sound without movement might indicate a weak motor or a problem with the regulator.
4. Manual Check (If Possible): If you can safely access the window regulator mechanism (by removing the door panel), you can try manually moving the window up and down to see if it's freely moving or if it's binding. This is a more advanced step and requires mechanical aptitude and the right tools. Exercise caution when working with car doors.
5. Professional Diagnosis: If you can't find the problem using these steps, take your car to a qualified mechanic. They have the experience and tools to diagnose and repair the issue accurately. They might need to remove the door panel to inspect the regulator and wiring.
Most likely solution: Given the history, the window regulator is the most likely culprit. Replacing it is a common repair for power windows and relatively straightforward for someone with some mechanical skills. However, it can be labor-intensive. You'll likely find replacement parts (regulators, motors, and switches) online or at an auto parts store. Make sure you get the correct part for your 1997 Oldsmobile Aurora.
