Blog Car Care Advice Active Windshield Wiper Fluid Symbol: What It Means + 3 Causes
Car Care Advice

Active Windshield Wiper Fluid Symbol: What It Means + 3 Causes

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You’re satisfied with how your car runs, but then the bubble of tranquility bursts – an illuminated windshield wiper fluid symbol appears on the dashboard. The windshield washer also stubbornly refuses to spray the fluid, no matter how many times you try the wiper lever.

What does the windshield wiper fluid light mean?
What causes it to pop on? 

Read on; we’ll get to it all.

This Article Contains:

Let’s shed some “light” on the issue!

What Does an Illuminated Windshield Wiper Fluid Symbol Mean?

It indicates a low windshield washer fluid level in the reservoir. The windshield wiper fluid symbol has a windshield sign with a dotted line representing the washer fluid jet.

The washer fluid helps the windshield wipers:

The windshield wiper fluid warning light isn’t something as serious as other dashboard lights (e.g., Check Engine Light), but you shouldn’t ignore it either. This is because a clean windshield is necessary for good visibility to avoid road accidents.

Now you know what this warning light means, let’s get to the causes behind it.

3 Reasons Your Windshield Wiper Fluid Light Is Activated

The factors behind a windshield wiper fluid light generally relate to the washer fluid reservoir, the washer fluid level sensor, or the electrical connection to it. We’ll cover them here.

1. Low Fluid Levels

This is the most common cause behind the wiper fluid warning light on your dashboard. The windshield wiper fluid level in the reservoir can fall due to:

2. Faulty Windshield Fluid Level Sensor

The fluid level sensor is generally located at the bottom of the washer tank and consists of a magnetic float and a switch. The sensor has an electrical connection to the dashboard and turns on the warning light if the fluid level gets low. A malfunctioning sensor can cause the low washer fluid light to come up despite an optimum fluid level.

3. Wiring Issues

Damaged wiring between the windshield fluid level sensor and the dashboard can result in an open circuit. This can lead to the illuminated windshield wiper fluid symbol on the dashboard in some cars.

Next, we’ll walk you through the steps for refilling a windshield wiper fluid reservoir.

How to Refill the Windshield Wiper Fluid

Refilling the windshield wiper fluid is an easy exercise that you can perform yourself. 

Important: Windshield washer fluids contain methanol to prevent it from freezing during the winter season. Methanol is toxic, and you shouldn’t ingest it, as even small quantities can lead to permanent organ damage and blindness.

Here is the process you need to follow:

1. Park your vehicle on level ground and open your vehicle hood.

2. Locate the windshield wiper fluid reservoir:

3. Open the reservoir cap and store it somewhere safe.

4. Check the fluid level in the reservoir.

5. In case of a low fluid level, mix the washer fluid with distilled water according to the recommended ratio.

6. Slowly add the windshield wiper fluid to the reservoir through a funnel till it reaches the “full” or “max” mark.

Note: Don’t overfill the reservoir, as the fluid can expand due to engine heat and leak. You can use a turkey baster to remove the excess liquid if you accidentally overfilled it. Also, ensure not to let debris or contaminants enter the washer tank while refilling. These can damage the washer fluid pump or the level sensor and clog the hose or nozzles.

7. Clean the cap using a rag and secure it back on the reservoir.

8. Close the hood and start the engine.

9. Check the windshield wiper fluid system using the wiper lever near the steering wheel. You can consult the owner’s manual to determine how to operate it correctly.

The warning light should disappear shortly after refilling the reservoir, but If it doesn’t, then there’s an issue with the washer fluid lever sensor or the windshield washer system wiring. In this case, you should always go for a professional repair service.

Coming up next are a few questions you may have about your car’s windshield washer system.

3 FAQs About the Windshield Wiper System 

Here are the answers to three questions about the washer system.

1. Can You Use Water in Place of Windshield Wiper Fluid?

No, you shouldn’t fill your windshield wiper fluid reservoir with plain water as:

2. How to Clear Clogged Windshield Wiper Fluid Nozzles?

Automotive polish or small debris in the windshield wiper fluid can clog the washer nozzles. You can unclog them using the methods given below:

If your car’s washer system doesn’t work even after clearing the nozzles, it could be a bad washer fluid pump at play.

3. Do Other Systems Depend on the Windshield Washer Fluid Reservoir?

While the windshield washer fluid isn’t as critical to the normal operation of your vehicle as fuel and engine oil are, it can still sometimes affect multiple systems. Your car’s headlight washers and rear wiper (if present) use the windshield washer fluid reservoir to source their cleaning fluid.

These systems, however, have their own washer fluid pump. Note that you may have to top up the windshield wiper fluid more frequently if your vehicle is equipped with headlight washers and a rear wiper.

4. How Often Should You Check the Washer Fluid Level on Your Vehicle?

The interval will vary depending on how often you use it and the size of the washer fluid reservoir. As a best practice, get it checked when you go for some other automotive service, like an engine oil change.

Additionally, always check the windshield washer fluid level before going on a long trip and at the start of the winter season. It’s advisable to store some washer fluid in your garage for an emergency. You can get it from a gas station when you go for a  fuel refill.

Wrapping Up

The illuminated windshield wiper fluid symbol is generally triggered by inadequate washer fluid in the reservoir. You should maintain an optimum washer fluid level to have a clean windshield and avoid this warning light. But if there’s enough washer fluid, you should seek assistance from a professional like RepairSmith to diagnose the cause. 

RepairSmith’s mobile auto repair service can take care of all your dashboard lights, be it a wiper fluid symbol or the Check Engine Light.

Get in touch with us today, and our expert mechanics will come to your driveway, fixing your car’s issues in no time!