Peterbilt Windshield Washer Pump Not Working

The cause of peterbilt windshield washer pump malfunctioning can be traced back to a clogged nozzle or pump, an inadequate supply of fluid, or an electrical problem. It’s essential to identify the root cause in order to fix the issue and ensure the smooth functioning of the windshield washer system.

Windshield washer pumps are highly necessary safety features in any vehicle. Having a clear, clean view of the road is important for safe driving, particularly in bad weather. When you press the windshield washer button in your peterbilt truck, the pump should engage to deliver a blast of cleaning solution to the windshield’s surface. However, if it doesn’t, it can leave you with a dirty view of the road.

This issue typically occurs due to a clogged nozzle or pump, inadequate washer fluid supply, or an electrical problem.

Introduction To The Issue

If you own a peterbilt truck and have recently noticed that your windshield washer pump is not working, you may be wondering how to fix the issue. In this article, we will provide a brief overview of the problem and explain why it is important to fix it.

We will also discuss the role of the windshield washer pump in your truck.

Brief Overview Of The Problem

The windshield washer pump is responsible for spraying the cleaning solution onto the windshield to clean it. If the pump is not working, the cleaning solution will not spray or will spray very weakly, making it difficult to clean your windshield.

This can be a safety hazard, as a dirty windshield can obscure your vision while driving.

Importance Of Fixing The Issue

Fixing the windshield washer pump is important for a number of reasons:

  • A clean windshield is essential for safe driving. Without a properly functioning washer pump, you may not be able to clean your windshield effectively, which can lead to reduced visibility and potential accidents.
  • Regular maintenance of your truck’s systems can extend the life of your vehicle and save you money in the long run. Fixing a small issue like a malfunctioning windshield washer pump can prevent more significant problems down the line.
  • Fixing the windshield washer pump is a relatively simple and inexpensive task that can be done at home with basic tools. By doing it yourself, you can save money on labor costs at a mechanic.

Role Of The Windshield Washer Pump

The windshield washer pump is a small electric pump that pumps cleaning solution from the washer reservoir to the nozzles on the windshield. The pump is typically located in the washer fluid reservoir and is activated when you pull the lever on the windshield wiper stalk.

Without the pump, the cleaning solution would not be able to reach the windshield, making it difficult to clean. The pump is an essential component of the windshield washer system and must be properly maintained to ensure that it continues to work correctly.

A malfunctioning windshield washer pump can be a safety hazard and should be fixed as soon as possible. By understanding the importance of fixing the issue and the role of the windshield washer pump in your vehicle, you can take steps to maintain your truck’s systems and keep your vehicle running smoothly for years to come.

Signs Of A Faulty Windshield Washer Pump

Your windshield washer pump plays a critical role in keeping your car’s windshield clean and your vision clear. If your windshield washer pump fails to work correctly, it can lead to serious safety concerns. In this section, we will discuss some signs of a faulty windshield washer pump that every driver needs to know.

Washers Not Spraying Fluid

One of the most obvious signs of a faulty windshield washer pump is that the washers may not spray any fluid.

  • Clogged washer nozzles
  • Blown washer pump fuse
  • Broken washer pump motor
  • Damaged or broken washer fluid lines
  • Dirty or clogged washer fluid reservoir

Weak Fluid Streams

Another sign of a faulty windshield washer pump is when you notice weak fluid streams.

  • Clogged washer nozzles
  • Low or empty washer fluid reservoir
  • Damaged or blocked washer fluid lines
  • Weak washer pump motor

Unusual Noises Coming From The Pump

If you hear strange noises coming from your windshield washer pump when you activate it, it is a clear indication that something is not working correctly.

  • Loose or worn-out washer pump motor
  • The pump motor is worn due to inadequate maintenance
  • Clogging in the washer fluid line
  • Broken or damaged pump impeller

Reduced Or No Fluid Pressure

Reduced or no fluid pressure is another common sign of a faulty windshield washer pump.

  • Clogged washer nozzles
  • Low or empty washer fluid reservoir
  • Worn out washer pump motor
  • Leaking washer fluid lines

Keep in mind that an efficient and functioning windshield washer pump plays a crucial role in keeping you safe on the road. By knowing these signs of a faulty windshield washer pump, you can quickly identify problems and take preventive measures to avoid any hazards.

Common Causes Of A Failed Windshield Washer Pump

A windshield washer pump is a vital component of any vehicle’s cleaning system. It delivers washer fluid to the windshield to keep it clean and clear of dirt and debris. However, like any other component, a windshield washer pump can fail, leading to a malfunctioning cleaning system.

Lack Of Fluid In The Reservoir

  • The most common cause of a failed windshield washer pump is the lack of fluid in the reservoir. Without enough fluid, the pump will not be able to suck up any liquid, leading to a malfunction.
  • It is necessary to always check the fluid level in the reservoir to ensure the system is functioning correctly.

A Clogged Nozzle

  • The washer nozzle can get clogged with dirt and debris over time, leading to a malfunction.
  • This can prevent washer fluid from being sprayed onto the windshield, causing the washer pump to fail.
  • Regular cleaning of the nozzle can prevent this issue.

A Malfunctioning Pump Motor

  • If the pump motor is damaged or worn out, the washer pump will not function correctly.
  • This can be caused by wear and tear or burn out due to electrical surges.
  • Replacing the pump motor is the only solution to this problem.

Damaged Washer Pump Wiring

  • Another reason for a failed windshield washer pump is damaged wiring.
  • The wiring can get damaged due to exposure to extreme temperatures or due to corrosion.
  • Fixing or replacing the wiring will solve this issue.

A Blown Fuse

  • A blown fuse can also cause the windshield washer pump to fail.
  • A fuse can blow if the pump motor draws too much power due to wear and tear or if there’s a short circuit.
  • Replacing the blown fuse with a new one will restore the pump’s function in this situation.

It is essential to maintain the windshield washer system to keep it functioning correctly. Regularly check the fluid level, clean the nozzle, and inspect the pump’s wiring to avoid common causes of failure. If you notice any issues, such as an unusual noise or a lack of fluid flow, be sure to inspect the pump motor and fuse for potential causes of malfunction.

Troubleshooting A Malfunctioning Windshield Washer Pump

If you are a peterbilt owner, having a functioning windshield washer pump is essential, especially if you drive in areas with a lot of bugs or debris. However, a malfunctioning pump can be a major annoyance, so it’s important to know how to troubleshoot the issue.

In this blog post, we will guide you through the process of troubleshooting a malfunctioning peterbilt windshield washer pump.

Checking The Fuse And Wiring

  • Check the fuse for any signs of burn-out or corrosion.
  • If the fuse is okay, check the wiring connections for any loose connections or corrosion.
  • Connect a multimeter to the wiring while someone activates the washer pump to check for any voltage.

Inspecting The Washer Reservoir And Nozzles

  • Check the washer reservoir for any blockages or damage.
  • Inspect the nozzles for any blockages or clogs by using a needle to clear them out.
  • Clean the nozzles and the reservoir using a washer solvent.
  • Check the hoses that connect the reservoir and nozzles for any kinks or damage.

Testing The Pump Motor

  • Disconnect the washer motor pump connector.
  • Connect a jumper wire to the motor, and if it’s working, the pump should activate.
  • If the pump motor does not activate, check for continuity with a multimeter.
  • If the pump motor does not have continuity or has failed, replace it with a new one.

Identifying Other Potential Issues

  • Check if the pump motor is getting sufficient power supply.
  • Check if there is any blockage in the tubing that connects the pump motor to the nozzles.
  • Check the wash/wipe switch and make sure it’s functioning correctly.
  • Inspect the washer pump fuse relay- if it’s damaged, replace it.

By following the above steps, you can troubleshoot a malfunctioning peterbilt windshield washer pump. If you have followed all the steps above, and still can’t fix the issue, it might be time to consult a professional mechanic. Keeping your windshield washer pump in top-notch condition is important for your safety while driving and ensuring your windshield is always clean and clear.

Fixing A Failed Windshield Washer Pump

If your peterbilt windshield washer pump isn’t working, it can be quite frustrating, especially when you need it the most. A faulty pump can result from a clogged nozzle, a damaged wiring connection, or a burnt-out motor. Before you decide to head to a local auto shop, there are a few simple steps you can take to fix it yourself.

Below are a few easy methods for fixing a failed windshield washer pump.

Replacing The Washer Pump Motor

One of the main reasons why your windshield washers may not work is a faulty motor. When this happens, it’s important to replace it with a new one.

  • First, locate the motor under the hood of your vehicle.
  • Remove the pump’s electrical connection, or the motor’s wires from the vehicle’s battery.
  • Take the motor out of the washer pump assembly.
  • Replace it with the new one.
  • Reconnect the electrical connection or the motor’s wires back to your battery.

Repairing Or Replacing The Wiring

Another way to fix a failed windshield washer pump is by repairing or replacing any damaged wiring connections.

  • Locate the electrical connections leading to your windshield washer pump.
  • Inspect them for any corrosion, frayed wiring, or loose connections.
  • If there is any damage, replace the wiring with new ones.
  • Reconnect the new wiring to the pump and battery.

Cleaning Or Replacing The Nozzle

A clogged nozzle is another common reason for a failed windshield washer pump.

  • Locate the nozzle at the base of your windshield wiper.
  • Use a needle or a pin to clear away any clogs or debris from the nozzle.
  • If the nozzle is damaged beyond repair, replace it with a new one.
  • Reconnect the new nozzle back to the windshield washer pump assembly.

Refilling The Washer Fluid Reservoir

It’s important to ensure that your washer fluid is at an adequate level before trying to operate your windshield washer pump.

  • Locate the washer fluid reservoir.
  • Remove its cap.
  • Add the appropriate washer fluid.
  • Replace the cap securely.

Fixing a failed windshield washer pump can easily be done at home. By following these simple steps, you can be back on the road with clear visibility in no time.

FAQ For Peterbilt Windshield Washer Pump Not Working

Why Is My Peterbilt Windshield Washer Pump Not Working?

There could be several reasons, such as a broken pump, clogged hoses, or a blown fuse.

How Can I Fix My Peterbilt Windshield Washer Pump?

Check pump connections, change the fuse, check hoses, or replace the pump.

Can I Replace The Peterbilt Windshield Washer Pump Myself?

Yes, but ensure to follow the manufacturer’s instructions and safety precautions.


After identifying and fixing the peterbilt windshield washer pump issue, it’s vital to maintain it properly. Regularly checking the system for any leaks, clogs, or damages can help prevent future problems and prolong the lifespan of the pump. It’s also crucial to make sure that the windshield washer fluid is always at an appropriate level.

Ignoring any warning signs or neglecting proper maintenance can lead to more significant and expensive problems in the future. Remember, a functioning windshield washer pump not only helps to keep your windshield clean, but it is also an essential safety feature that must be in good working condition.

By following the steps outlined in this post, you can fix your peterbilt windshield washer pump and keep it in good working order for years to come.

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