2018 Chevy Equinox blue back view

Do you need to fill your rear windshield washer fluid?

Refilling rear windshield washer fluid

If you have a rear windshield wiper on your car, then you also likely have a little spray nozzle for windshield wiper fluid back there just like you do up front. Not sure where that fluid in back comes from? Don’t worry, because we can tell you how to go about refilling rear windshield washer fluid.

2018 Ford EcoSport blue back viewIs there a special reservoir for rear windshield washer fluid?

You are likely already familiar with your windshield washer fluid reservoir for your front wipers. It’s located under the hood of pretty much every vehicle, and it’s usually readily available and clearly marked. The back reservoir however, seems to be a mystery.

That’s simply because there isn’t one. Auto manufacturers want to make filling washer fluid simple and easy, so instead of creating a whole separate reservoir, they simply tap into that reservoir up front, and run a line all the way to your rear windshield. In short, to fill your rear windshield washer fluid, simply fill the reservoir up front.

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2004 Jeep Grand Cherokee steering wheel-mounted wiper controlsWhat if the rear fluid doesn’t work but the front fluid does?

We’ve established that the fluid comes from the same spot, but what if your rear windshield washer isn’t spraying but your fronts still are? There could be a few issues, but first, start by making sure that the washer fluid reservoir under the hood is full. Depending on the design of your car’s washer fluid system, a low fluid level could still be the cause.

If it has been particularly cold out, you may have a frozen line. You should always try to use fluid that is rated for the coldest conditions of your climate. If it could be a frozen line, then simply let your car warm up, and hopefully that will take care of it.

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Otherwise, you are likely dealing with a clogged or damaged line. You can check the nozzle in back to ensure that it’s clear, but outside of that, your washer system will likely need service work performed. Don’t try running other chemicals through your system to alleviate the clog as they could lead to further damage and they likely not fix the clog in the process anyway.

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