How do rain-sensing windshield wipers work?

Rain-sensing wipers use optical, infrared, or acoustic technology, or a combination of the three, to detect rainfall.

Rain sensor & headlight sensor testing

Using the rain sensor

2016 Touring rain sensing wiper does not work

All You Need To Know About Rain Sensing Wipers

Auto wipers not working - Nissan Forum

Mazda CX-5 Owner's Manual

How Do Rain Sensor Wipers Work and Are They the Right Choice for You? - In The Garage with

How Does a Car Rain Sensor Work? - Explained - Car Report Online — Eightify

XC90 Using the rain sensor

How do rain sensors on cars work, and why do they often set wipers at the wrong speed? - Quora

Buick Rainsense Automatic Wipers Keep Vision Clear - The News Wheel

XC60 Using the rain sensor