1. Obstructions:
* Check for obstructions: The most common cause. Look closely inside the door track (both upper and lower) for anything that might be blocking the door's movement. This includes:
* Debris (leaves, small toys, etc.)
* Ice (if it's cold)
* A misplaced item in the door pocket
* Damaged or misaligned weather stripping.
* Manually try to close the door: If it's difficult to close manually, there's definitely a mechanical issue.
2. Power Issues:
* Check the Power: The door's motor needs power to operate. Make sure the power sliding door switch is working. Try all other power sliding door switches if your Windstar has multiple.
* Fuses and Relays: Check the owner's manual for the fuse and relay related to the power sliding door. Inspect these for damage.
* Wiring: Look for frayed, damaged, or disconnected wiring harness connected to the sliding door motor. This is more challenging and might require professional help.
3. Motor Problems:
* Motor itself: The motor might be weak or failing. This is more likely if the door closes slowly or struggles to close at all. This usually requires professional repair or replacement.
* Gear Mechanism: The motor's gears might be stripped or damaged, preventing proper operation. This is also a more involved repair.
4. Sensors:
* Limit Switches: These sensors tell the motor when to stop. If these are malfunctioning or misaligned, the door might stop short of being fully closed. This usually requires specialized tools and knowledge.
* Obstacle Sensors: Some Windstars have sensors that detect obstructions. If one is faulty, it might prevent the door from closing completely, even if there's no actual obstruction.
5. Linkage and Roller Problems:
* Roller Assemblies: The rollers in the track can wear down or become misaligned, making smooth closing difficult or impossible. Inspect for damage or binding.
* Linkage: The mechanical linkage connecting the motor to the door itself can become damaged or disconnected.
Troubleshooting Steps:
1. Start with the simplest: Check for obstructions first. This is the easiest and most likely solution.
2. Check power: Inspect fuses and relays.
3. Manual Test: Try closing the door manually to determine if it's a power or mechanical problem.
4. Visual Inspection: Carefully examine the tracks, rollers, and linkage for any damage.
When to Call a Professional:
If you've checked the easy things and the door still doesn't close properly, it's best to seek professional help. Diagnosing and repairing motor problems, sensor issues, or damaged linkage often requires specialized tools and expertise. A qualified mechanic familiar with Ford Windstars will be able to diagnose the problem accurately and provide the necessary repairs.
