* Motor Failure: The most common reason. The motor's gears may be stripped, the armature may be burned out, or the brushes might be worn down. A clicking sound often means the motor is trying to engage but lacks the power to turn the gear assembly.
* Power Supply Issues:
* Blown Fuse: Check the vehicle's fuse box (usually under the hood or in the passenger compartment) for a blown fuse related to the power windows. Consult your owner's manual to locate the correct fuse.
* Broken Wire: A wire in the harness leading to the motor could be broken or disconnected. This is often caused by wear and tear, especially near the door's flexing points. Inspect the wiring carefully.
* Faulty Window Switch: The switch itself could be malfunctioning, even if the other window switches work. Try using the passenger-side switch to operate the driver's side window (if it works, the switch is likely the culprit).
* Bad Regulator: The window regulator is the mechanism that moves the window up and down. If it's jammed or broken, the motor will click but won't be able to move the window. This is common as plastic components in the regulator can break or wear down over time.
* Mechanical Issues (Regulator):
* Jammed Window: Something might be blocking the window from moving. Check for obstructions in the window track. Manually try to move the window (with the power off, of course) to see if it's stuck.
* Broken Window Track: The window track itself might be damaged, preventing smooth movement.
* Broken Cable (if cable-operated): Some older vehicles (less likely with a 2002 Windstar, but possible) use cables to move the window. These cables can snap or become frayed.
Troubleshooting Steps:
1. Check the fuse: This is the easiest and cheapest fix.
2. Inspect the wiring: Look for any visible damage to the wires leading to the motor.
3. Try the passenger-side switch: If it works, the problem is likely the driver's side switch.
4. Manually test the window: Try moving the window up and down manually (disconnect the battery first!). If it's stuck, you'll need to investigate the regulator.
5. Inspect the regulator: You'll likely need to remove the door panel to access the regulator and see if any components are broken or jammed.
If you're not comfortable with auto repair, it's best to take your Windstar to a mechanic. Replacing the motor, regulator, or even just the switch can be involved depending on your mechanical skill. The cost of repair will depend on the exact cause.
