Tap the window while trying to raise it:
If the window starts working when you tap on it while trying to raise it, it could indicate a faulty regulator. Tapping can sometimes help dislodge any obstructions or provide temporary movement to the regulator mechanism.
Check for obstructed tracks:
Look for any objects, debris, or misaligned tracks that may be hindering the window's movement. Dirt, ice, or other foreign objects can sometimes prevent the window from moving smoothly.
Test the motor directly:
Disconnect the window motor from the regulator assembly. Then, connect the motor directly to a power source (such as a car battery). If the motor operates correctly when directly powered, it indicates that the motor is functioning properly, and the issue may be with the regulator.
Inspect the regulator mechanism:
Remove the door panel to access the window regulator mechanism. Check for any broken or damaged parts, such as gears, cables, or mounting points. If you notice any damage or excessive wear, it may indicate a faulty regulator.
By performing these steps, you should be able to narrow down the cause of the window issue and determine whether it's the motor or the regulator that needs attention. If you're not comfortable performing these checks yourself, it's best to consult with a professional mechanic or auto electrician to get an accurate diagnosis and repair.