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  #1  
Old 03-22-2019, 11:58 AM
rpickoff rpickoff is offline
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Auto wipers

Why is it that the auto setting on my wipers always guesses the wrong speed to wipe? Slight drizzle? Wiping at top speed. Starting out in the rain? Doesn’t wipe for a full minute. Heavy downpour? Not wiping fast enough. Maybe I’m not understanding their function??


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  #2  
Old 03-22-2019, 01:21 PM
John MS John MS is offline
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Try setting the rain sensitivity to low and gradually work up. On my car it works as well as other cars I have driven. Not perfect but reasonably good.
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Old 03-22-2019, 01:23 PM
rpickoff rpickoff is offline
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Originally Posted by John MS View Post
Try setting the rain sensitivity to low and gradually work up. On my car it works as well as other cars I have driven. Not perfect but reasonably good.
I'll give it a shot. Where is the sensor for the wipers? What exactly triggers them?
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Old 03-22-2019, 02:16 PM
John in VA John in VA is offline
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From BMW: Rain sensor.
The rain sensor and light sensor ensure that you enjoy unimpeded vision at all times, come rain or come shine. The windscreen wiper speed is adjusted and the headlights are activated when required.

Located on the inner top edge of the windscreen, the rain sensor is activated using the interval control of the windscreen wiper. Using infrared technology, it recognises drops of water on the windscreen and adjusts the speed of the windscreen wiper to suit the intensity of the rain.
In heavier rainfall or when accelerating to pass a long vehicle, for example, the windscreen wipers automatically increase in pace to ensure unimpeded vision. Additional light sensors in the windscreen detect changes in light conditions - e.g. at dusk or when entering a tunnel - and automatically turn on the dipped-beam headlights.
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Old 03-22-2019, 03:35 PM
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tex2670 tex2670 is offline
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Quote:
Originally Posted by rpickoff View Post
I'll give it a shot. Where is the sensor for the wipers? What exactly triggers them?
It's behind the rear view mirror, flush against the window. There's a light sensor. Google will explain it's workings better than I can.
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Old 03-23-2019, 08:46 AM
rpickoff rpickoff is offline
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Originally Posted by Yosbank View Post
+1

[IMG]https://**********/assets/79/BB.jpg[/IMG]


I wonder if my EZ PASS is interfering with the function? I had it stuck on the upper windshield just on the passenger side of the mirror mount.


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Old 03-23-2019, 02:28 PM
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tex2670 tex2670 is offline
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Originally Posted by rpickoff View Post
I wonder if my EZ PASS is interfering with the function? I had it stuck on the upper windshield just on the passenger side of the mirror mount.


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This could only happen if you mount your EZ Pass on the outside of the windshield, over the rain sensor.
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