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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YourMechanic Brake Pad Replacement Service

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Number of Reviews

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Rating Summary
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11,083
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89

Nazareth

26 years of experience
110 reviews
Nazareth
26 years of experience
Mazda 3 - Brake Pads Replacement (Rear) - Los Angeles, California
Nazareth provides excellent service. He is very friendly, flexible and proactive, I can only recommend booking him.
Mazda 3 - Brake Pads Replacement (Front, Rear) - Glendale, California
Nazareth was great to work with. I would highly recommend him for future vehicle work. He was able to get the job done quickly and in a professional manner.

Michael

7 years of experience
16 reviews
Michael
7 years of experience
Honda Accord - Brake Pads Replacement (Rear) - Scottsdale, Arizona
Michael is awesome! Extremely knowledgeable, competent, and has strong integrity. He was able to help me understand why I didn’t need certain fixes that the dealership recommended (which ended up saving me almost a thousand dollars). He’s very personable, charismatic, and skilled at what he does. I can confidently say that the “YourMechanic” website is beyond blessed to have this man working with them.
Jeep Wrangler - Brake Pads Replacement (Front, Rear) - Chandler, Arizona
Very professional and knowledgeable. I would highly recommend Michael to anyone looking for car maintenance. Great service! Thank you.

Jason

31 years of experience
167 reviews
Jason
31 years of experience
Fiat 500L - Brake Pads Replacement (Rear) - San Jose, California
Unbelievably efficient and knowledgeable. Jason just comes and gets it done. I so appreciate his commitment to Excellence as evidenced by his refusal to use the wrong oil for my oil change, even though it meant him coming out another day. Just had my brakes done in less than an hour. So happy I found this and so happy that Jason's my mechanic. I highly recommend him. Meghan in San Jose
Nissan Altima - Brake Pads Replacement (Front) - San Mateo, California
Jason was very professional and friendly. He provided extremely honest and helpful advice on issues with my Altima that would require proactive future maintenance.

Pardeep

20 years of experience
655 reviews
Pardeep
20 years of experience
Honda Civic - Brake Pads Replacement (Front) - San Jose, California
Thank you for helping to problem solve and being professional. I will likely be seeing you again soon.
Ford Fusion - Brake Pads Replacement (Rear) - Fremont, California
Again 5 star service. And already scheduling him for my next appointment. Highly recommend Pardeep for your car needs.

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