FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Rain Sensor: Description and Operation



Rain Sensor (649)

Location







Main task
The rain sensor controls windscreen wiping.

Type
The sensor detects whether or not the windscreen needs wiping.

The rain sensor transmits light that is reflected differently depending on how much water is on the windscreen. The sensor detects the intensity of the reflected light and uses this to determine whether or not the wipers should be activated.

Connection


Pin No. 1 - 3: