Why Do Windshield Wipers Turn On When I Start The Car?

March 4, 2024

Windshield wipers are designed to keep the driver’s vision clear in all weather conditions. They are typically turned on when the car is started so that they can be used to remove snow, rain, and ice. Unfortunately, some drivers may notice that their windshield wipers turn on by themselves without any manual input from the driver. This can be a frustrating and dangerous problem. If the windshield wipers turn on when the car starts it could result in distraction while driving and can also cause unnecessary wear and tear on the wiper blades, causing them to need replacement sooner than necessary.

The windshield wipers on your car are attached to moveable arms that are connected to a motor that controls them. The motor is powered by an electrical signal that is sent when the wiper switch is on. When the signal is activated the motor moves the arm back and forth across the windshield to remove water, ice, dirt, and debris from the windshield.

The average lifespan of a windshield wiper switch is around the lifetime of the vehicle. However, they can get worn down faster if you live in a harsh climate or have aggressive driving habits. Additionally, the windshield wiper system is also fed by a separate switch inside of the wiper motor called the park switch that keeps the motor running until it returns to its resting position. If the park switch is faulty it can be feeding electricity to the windshield wipers even when the main switch is off.


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