How Do Rain-Sensing Wipers Work?

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Several decades ago, the only settings windshield wipers came with were low, high, and off. Later, an intermittent wiper feature was integrated into many windshield wiper switches, allowing drivers to reduce the frequency of wiper movements based on the intensity of precipitation. The most innovative addition to windshield wiper technology has come in recent years, in the form of rain-sensing wipers.

Rain-sensing wipers turn on when precipitation or another obstruction is on the windshield. The wipers engage on their own and the frequency of windshield wiper swipes is adjusted based on the weather conditions.

So How Do Rain-sensing Wipers Actually Work?

Mounted on the windshield, usually close to or integrated into the rear-view mirror base, is a sensor. Most rain-sensing wiper systems use an infrared light that is projected through the windshield glass at a 45-degree angle. Based on how much light returns back to the sensor, the wipers engage or adjust their speed. If rain or snow, or dirt or another substance is on the windshield, less light returns to the sensor and the wipers turn on independently.

Rain-sensing wipers will turn on faster than you can respond, especially in a surprising situation like your windshield getting splashed by passing traffic. Your vehicle is still equipped with a manual override with at least a low, high, and off switch in the case of rain-sensing wiper malfunction.


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Fabrice

18 years of experience
133 reviews
Fabrice
18 years of experience
Toyota Yaris - Brake Pads Replacement (Front) - Orlando, Florida
My appointment was late in the day, so being late was expected. Fabrice notified me ahead of time about his tardiness. When he arrived, he was apologetic, courteous and professional. He got to work right away and let me know of other work that was needed for future appointments

Oreste

12 years of experience
111 reviews
Oreste
12 years of experience
Nissan Frontier - Brake Pads Replacement (Front) - Miami, Florida
The best ever!!!! Will not use anyone else in future .. very knowledgeable and explained every thing to me .very professional, well spoken .

Breck

18 years of experience
527 reviews
Breck
18 years of experience
Jeep Patriot - Brake Pads Replacement (Front, Rear) - Houston, Texas
Becks was very informative about things that I didn't know needed to be looked at with my car. He fixed little hick ups quickly and had me ready to get back on the road sooner than I thought he would.

Miguel

19 years of experience
63 reviews
Miguel
19 years of experience
Audi allroad - Brake Pads Replacement (Front) - Fair Lawn, New Jersey
Miguel is very professional mechanic. He called me in advance about his coming. He brought the quality parts (brakes pads and rotors) and done his job quickly and of great quality. I tested the brakes after the replacement and they were efficient and very silent. I would recommend him very much.

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