1. Power Issues:
* Blown Fuse: Check the owner's manual for the location and amperage of the power window fuses. A blown fuse is the easiest and cheapest fix. Replace it with the correct amperage fuse.
* Faulty Wiring: Worn, frayed, or corroded wires in the door harness (the bundle of wires running between the door and the vehicle body) are common culprits. Inspect the wires for damage, especially where they flex as the door opens and closes.
* Window Switch Circuit Board: The circuit board in the master power window switch (usually on the driver's side) can fail, affecting individual windows. A faulty switch can be expensive to replace.
* Poor Ground Connection: A bad ground connection somewhere in the circuit can prevent power from reaching the window motor. Look for corrosion or loose connections at ground points.
2. Motor Problems:
* Window Motor Failure: The window motor itself could be burned out or seized. This requires replacing the motor, a moderately difficult repair.
* Window Regulator Failure: The window regulator is the mechanical system that raises and lowers the window. It can fail due to wear and tear, especially the cables or plastic components. Replacing the regulator is a more complex job than replacing the motor.
3. Other Factors:
* Window Lockout: Some vehicles have a child safety lock feature that disables the rear passenger windows. Check if this feature is accidentally engaged.
* Obstructions: Something might be jamming the window, preventing it from moving. Check for debris, ice, or damage to the window itself.
* Low Battery Voltage: A very weak battery might not provide enough power to operate the window motor.
Troubleshooting Steps:
1. Check the fuse first. This is the simplest and quickest check.
2. Test the window switch. Try the passenger window switch and other switches on the driver's side. If none work, the problem may be with the master switch or wiring. If only the passenger window is affected, the problem is likely localized.
3. Listen for any sounds. When you press the switch, do you hear a click or a hum from the door? A hum suggests the motor is working but may be struggling. No sound indicates a power or motor problem.
4. Inspect the wiring. Carefully check the wiring harness in the door for damage.
5. Manually try to move the window. If you can manually move the window up and down, the problem is likely with the motor, switch, or wiring.
If you're not comfortable working on car electronics, it's best to take your Windstar to a qualified mechanic for diagnosis and repair. The cost of a professional diagnosis is generally worth avoiding costly mistakes from attempting repairs yourself without the necessary expertise.
