Here's a breakdown of potential issues and troubleshooting steps:
1. Check the Wiper Linkage: The most common cause of wipers not parking is a problem with the linkage connecting the motor to the wiper arms. Inspect the linkage for:
* Broken or worn parts: Look for cracks, bends, or excessive play in the linkage arms and joints. Replace any damaged components.
* Binding: Make sure the linkage moves freely without any binding or resistance. Lubricate if necessary with a silicone-based lubricant (avoid petroleum-based products).
* Correct alignment: Ensure the linkage is properly aligned and connected to both the motor and the wiper arms.
2. Wiper Motor itself: While less common, the wiper motor's internal park mechanism could be faulty. This usually requires replacing the entire motor. This is less likely than linkage issues.
3. Wiper Switch/Control Module: A malfunctioning wiper switch or control module can prevent the wipers from parking correctly. This is often diagnosed by testing the switch for continuity and checking the module for error codes (requires a scan tool).
4. Electrical Issues: Faulty wiring or connectors can disrupt the electrical signals needed for the wipers to park. Inspect the wiring harness for damage, corrosion, or loose connections.
Troubleshooting Steps:
1. Visual Inspection: Start by carefully examining the entire wiper system, paying close attention to the linkage.
2. Test the Wiper Switch: Try using all the wiper functions (intermittent, low, high). If none of the speeds work, the problem likely isn't the park function specifically.
3. Listen for Motor Sounds: When activating the wipers, listen for any unusual noises from the motor. Grinding or clicking sounds suggest internal motor problems.
4. Check Fuses and Relays: Consult your owner's manual to locate the fuses and relays related to the wiper system. Check for blown fuses or faulty relays.
If you're not comfortable working on your vehicle's electrical system or mechanical components, it's best to take it to a qualified mechanic for diagnosis and repair. Incorrectly diagnosing or repairing the wiper system can lead to further damage.
