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pmt853
Lv 7
pmt853 asked in Cars & TransportationMaintenance & Repairs · 6 years ago

What triggers the automatic windscreen wipers on many modern cars to come on?

Update:

I guess it's likely to be something related to electrical currents, but is this right and how does it work?

Update 2:

I realise there's a sensor, but how does it work?

5 Answers

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  • sc0rpyo_nytes
    Lv 7
    6 years ago
    Favorite Answer

    Rain sensors. The sensors beam an infrared light that bounces back to the sensor. When the windshield becomes wet, less light comes back triggering the wipers.

  • Anonymous
    5 years ago

    Yes Behnaz Akghar is hot- just googled her, my bbc weather presenter is Keeley Donovan and she hot too

  • Anonymous
    5 years ago

    Moisture.

  • Stpaulguy
    Lv 7
    6 years ago

    rain sensor at base of window

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  • Anonymous
    5 years ago

    MAGIC HEHE MAGIC I SAY

    you are the real troll

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