Rear windshield wipers stopping mid-swipe can be frustrating and inconvenient, especially during inclement weather. This issue is often caused by a few common problems such as motor failure, electrical issues, or mechanical obstructions. Understanding these causes can help you troubleshoot and resolve the problem effectively.

What Causes Rear Windshield Wipers to Stop Mid-Swipe?

1. Motor Failure

The wiper motor is a crucial component that powers the movement of the wiper blades. If the motor is failing, it may cause the wipers to stop unexpectedly. Motor failure can occur due to:

• Wear and Tear: Over time, the motor components may degrade, leading to reduced performance.
• Overheating: Continuous use without breaks can cause the motor to overheat and temporarily stop working.

2. Electrical Issues

Electrical problems are another common reason for wipers to stop mid-swipe. These issues can include:

• Blown Fuse: A fuse controls the electrical current to the wiper motor. If it blows, the wipers may stop functioning.
• Faulty Wiring: Damaged or corroded wiring can interrupt the electrical flow, causing the wipers to halt unexpectedly.
• Relay Problems: The relay is responsible for switching the wipers on and off. A malfunctioning relay can cause intermittent operation.

3. Mechanical Obstructions

Physical obstructions can also cause the wipers to stop mid-swipe. Possible obstructions include:

• Ice or Snow: Accumulation on the windshield can hinder wiper movement.
• Debris: Leaves or dirt trapped in the wiper mechanism can prevent proper operation.

4. Wiper Arm or Blade Issues

Sometimes, the problem might lie with the wiper arms or blades themselves:

• Loose Wiper Arm: If the wiper arm is not securely attached, it may stop moving.
• Worn-Out Blades: Damaged blades can stick to the windshield, causing the wipers to halt.

How to Troubleshoot Rear Windshield Wipers Stopping Mid-Swipe

To address the issue of rear windshield wipers stopping mid-swipe, follow these troubleshooting steps:

1. Inspect the Blades and Arms: Check for any visible damage or obstructions. Clean the blades and remove any debris.

2. Check the Fuse: Locate the fuse associated with the wiper motor in your vehicle’s fuse box. Replace it if necessary.

3. Examine the Wiring: Look for any signs of damage or corrosion in the wiring. Repair or replace faulty wires.

4. Test the Motor: If possible, test the motor with a multimeter to ensure it is receiving power. Replace the motor if it is faulty.

5. Verify the Relay: Swap the relay with a similar one from another system in the car to see if the problem persists.

6. Clear Mechanical Obstructions: Remove any ice, snow, or debris from the windshield and wiper mechanism.

Practical Examples and Statistics

A study by the National Highway Traffic Safety Administration (NHTSA) found that 25% of wiper failures are due to electrical issues, while 15% are caused by mechanical obstructions. Regular maintenance and inspection can help prevent these common issues.

People Also Ask

Why do rear windshield wipers stop working completely?

Rear windshield wipers may stop working entirely due to a blown fuse, motor failure, or a broken wiper switch. Checking these components can help diagnose the issue.

How can I prevent my rear windshield wipers from stopping mid-swipe?

Regular maintenance such as cleaning the blades, checking the fuse, and inspecting the wiring can prevent issues. Ensure the wiper arms are securely attached and free of obstructions.

Can a faulty wiper relay cause intermittent wiper operation?

Yes, a faulty relay can cause intermittent operation. The relay controls the power supply to the wiper motor, and a malfunction can lead to inconsistent wiper movement.

What should I do if my wipers stop in the middle of a rainstorm?

If your wipers stop during a rainstorm, safely pull over and inspect the fuse and wiring if possible. Clear any obstructions from the blades. If the issue persists, seek professional assistance.

Are there any temporary fixes for wipers stopping mid-swipe?

A temporary fix can include manually adjusting the wiper arms or blades to ensure they are not stuck. However, it is essential to address the underlying issue for a long-term solution.

Conclusion

Rear windshield wipers stopping mid-swipe can be caused by motor failure, electrical issues, or mechanical obstructions. By inspecting and maintaining the wiper system, you can prevent and resolve these issues effectively. Regular checks and timely repairs will ensure your wipers function correctly, enhancing safety and visibility during adverse weather conditions.

For further guidance, consider consulting your vehicle’s manual or seeking professional automotive assistance. Regular maintenance not only extends the life of your wiper system but also ensures optimal performance when you need it most.