Why Do F150 Windshield Wipers Won’t Turn Off? [Troubleshooting and Fix]

Dealing with malfunctioning windshield wipers can be frustrating, especially when they refuse to turn off. If you own an F150 and are experiencing this issue, you’re not alone. Understanding the possible causes of your F150’s windshield wipers staying on can help you find a solution quickly. 

When your F150 windshield wipers won’t turn off, the common reasons are faulty switch, relay, or wiring problem. These components play a crucial role in controlling the wipers’ function, and any malfunction can result in them staying on indefinitely. 

In this blog post, we will explore common reasons behind this problem and provide guidance on how to address it effectively.

What Causes f150 windshield wipers won’t turn off?

If your Ford F-150’s windshield wipers are persistently operating and won’t turn off, there could be a few common causes for this issue. Here are some possibilities to consider-

Faulty Wiper Switch 

The windshield wiper switch may be malfunctioning, causing it to stay in the “on” position even when you try to turn it off. 

This could be due to a mechanical or electrical problem within the switch itself. Replacing the switch should resolve the issue.

Stuck Wiper Relay 

The wiper relay is responsible for controlling the power supply to the wiper motor. 

If the relay gets stuck or malfunctions, it may continuously send power to the wiper motor, causing the wipers to remain operational. Checking and replacing the wiper relay could be a solution.

Worn-out Wiper Motor 

The wiper motor itself could be worn out or experiencing internal issues that prevent it from responding to the commands to turn off. In this case, replacing the wiper motor might be necessary.

Shorted Wiring 

A short circuit in the wiring system can cause the wipers to stay on. This could occur due to damaged or frayed wiring, which can create unintended connections and keep the wipers running. 

Inspecting the wiring harness for any signs of damage and repairing or replacing it as needed could fix the problem.

Water or Moisture Damage 

Excessive moisture or water infiltration into the wiper motor or its electrical components can cause malfunctioning. 

This can happen due to worn-out seals or exposure to heavy rain or flooding. Drying out or replacing the affected parts may be required.

How to Fix F150 Windshield Wipers That Won’t Turn Off?

If you’re experiencing an issue where the windshield wipers on your F150 won’t turn off, there are a few troubleshooting steps you can take to try and resolve the problem. Here’s what you can do-

Check The Wiper Switch 

Ensure that the wiper switch is in the “off” position. Sometimes, the switch can get stuck or become faulty, causing the wipers to remain active.

Inspect The Wiper Motor 

The wiper motor could be the culprit if it’s malfunctioning. Locate the motor, usually under the hood in the engine bay. 

Check for any visible damage, loose connections, or signs of wear. If you notice anything unusual, it may require professional attention or replacement.

Examine The Wiper Relay 

The wiper relay controls the power supply to the wiper motor. Locate the relay, usually in the fuse box or power distribution center under the hood. 

Replace the relay with a new one to see if it resolves the issue. Consult your vehicle’s manual or a mechanic for the exact location of the relay.

Inspect The Wiring 

Look for any loose or damaged wiring connections related to the wiper system. Ensure that all connections are secure and free from corrosion. If you find any damaged wires, consider repairing or replacing them.

Check The Wiper Linkage 

The wiper linkage connects the wiper motor to the wiper arms. Over time, it can become loose or worn out, leading to issues with the wiper operation. 

Inspect the linkage for any signs of damage or detachment. If necessary, tighten any loose components or replace the linkage altogether.

Verify The Wiper Switch Mechanism 

The switch mechanism may have worn out or become misaligned, causing it to remain in the “on” position. Disassemble the steering column to access the switch mechanism. 

Check for any visible issues or misalignment. If needed, replace the switch mechanism or seek professional assistance.

Expert Tips to Avoid Ford F150 Windshield Wiper Issues

Proper maintenance is essential for preventing windshield wiper issues in any vehicle, including the Ford F150. Here are some tips to help you maintain your F150’s windshield wipers-

Regularly Clean The Windshield 

Dirt, debris, and grime can accumulate on the windshield, affecting the performance of the wiper blades. 

Clean the windshield regularly using a glass cleaner to keep it free from dirt and contaminants.

Inspect The Wiper Blades 

Check the condition of your wiper blades frequently. Look for signs of wear such as cracks, tears, or fraying. 

If the blades appear damaged or worn out, it’s time to replace them. Ideally, wiper blades should be replaced every six months to a year.

Clean The Wiper Blades 

Wiper blades can accumulate dirt and debris over time, which can affect their performance and cause streaking. 

Clean the wiper blades regularly using a soft cloth or paper towel dampened with windshield washer fluid or mild soapy water. 

Gently wipe the blades to remove any dirt or residue.

Check The Windshield Washer Fluid Level 

Ensure that the windshield washer fluid reservoir is filled to the appropriate level. 

Low fluid levels can result in ineffective cleaning and may strain the wiper motor. 

Use a washer fluid specifically designed for windshields to prevent streaking or smearing.

Inspect The Wiper Arms And Linkage 

The wiper arms and linkage should be inspected periodically for any signs of damage or looseness. 

If you notice any issues, such as bent or loose wiper arms, have them repaired or replaced promptly.

Protect The Wiper Blades During Extreme Weather Conditions 

In freezing temperatures, make sure to lift the wiper blades away from the windshield to prevent them from freezing onto the glass. This will protect the blades from damage when you start your vehicle.

Replace Worn Wiper Blade Inserts 

If your F150 has wiper blades with replaceable inserts, inspect them regularly and replace them as needed. Worn inserts can cause streaking and reduced visibility.

Avoid Using The Wipers On A Dry Windshield 

Running the wipers on a dry windshield can cause premature wear of the blades. 

Always ensure there is an adequate amount of windshield washer fluid or moisture on the windshield before using the wipers.

Frequently Asked Question

If you’re facing the frustrating issue of F150 windshield wipers that won’t turn off, you’re not alone. Here are some frequently asked questions about this problem along with their answers-

Can I Manually Stop The F150 Windshield Wipers From Operating?

In most cases, you can manually stop the windshield wipers by turning off the ignition or removing the fuse for the wiper system. However, this is a temporary solution, and you should have the problem diagnosed and repaired to ensure proper functionality.

Are There Any Weather-Related Factors That Can Cause The F150 Windshield Wipers To Stay On?

Yes, extreme weather conditions such as heavy rain, snow, or ice can cause the wiper control module to malfunction, leading to the wipers getting stuck in the on position. Clearing any debris or ice buildup and allowing the system to dry out may help resolve the issue.

Can I Fix The Problem Myself, Or Do I Need To Take My F150 To A Professional?

If you have experience with automotive electrical systems, you may attempt basic troubleshooting such as checking fuses and connections. However, since the issue can be complex and may require specialized tools, it’s often recommended to seek professional assistance to diagnose and fix the problem correctly.

How Much Does It Typically Cost To Repair F150 Windshield Wipers That Won’t Turn Off?

The cost of repairs can vary depending on the underlying cause of the problem. It’s best to consult with a mechanic or service center for an accurate diagnosis and estimate of the repair costs.


If your F150 windshield wipers won’t turn off, it could be due to a faulty wiper switch, a malfunctioning wiper motor, or a wiring issue.

It is important to have the problem diagnosed and repaired by a qualified mechanic to ensure proper functioning of your vehicle’s wiper.

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