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Anyone know how these things work followed instructions in Handbook, but never wiped my windsreen. Where is the sensor, Is there an on/off switch, Is it expensive to sort out if its duff?:conf
 

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On the E38 7series the sensor is mounted on the inside of the windscreen above the centre rear view mirror, it uses a reflected infra red beam to detect water o nthe windscreen. It is turned on using the wiper stalk in the first position above off.
Not sure if its the same on your car.
 

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Anyone know how these things work followed instructions in Handbook, but never wiped my windsreen. Where is the sensor, Is there an on/off switch, Is it expensive to sort out if its duff?:conf
it should work... ;)
switch ignition ON... switch wiper to ur first position, then hose ur windshield. wipers should work when it detects water :) in the glass.
 
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