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Rear wiper randomly wipes when starting the car


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9 replies to this topic

#1 OFFLINE   p38fln

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Posted 12 July 2017 - 04:01 PM

Every couple of days, the rear wiper will make one wipe across the rear window when I start the car.  Is this normal?  It's not reproducable, very random behavior.









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#2 OFFLINE   Ephethean3

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Posted 12 July 2017 - 09:53 PM

The back wiper in my 2015 will also do that sometimes but not every time I tap the front wiper once to clear the morning dew. Any additional taps will not cause the back one to wipe. I don't know why there is no consistency to it but there isn't. I've stopped trying to figure it out.

#3 OFFLINE   ptjones

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Posted 13 July 2017 - 09:51 AM

I see the same and I have auto sensing wiper position on. :)

 

Paul



#4 OFFLINE   dyee

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Posted 13 July 2017 - 10:57 AM

Could it be the courtesy rear wipe? If your front wiper is on and you shift to reverse the rear wipe swipes once.
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#5 OFFLINE   ptjones

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Posted 13 July 2017 - 12:41 PM

This could be, It only goes when the front wiper goes first thing when you start up. Usually when it's wet. :headscratch:

 

Paul



#6 OFFLINE   raadsel

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Posted 13 July 2017 - 12:49 PM

I see the same and I have auto sensing wiper position on. :)

 

Paul

 

I've seen the rear wiper go when switching into reverse. My guess is that it is tied to the front sensor, that if it senses wetness and you've run (or had on auto) the front wiper, it automatically does the rear wiper when put in reverse.



#7 OFFLINE   Plus 3 Golfer

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Posted 13 July 2017 - 02:56 PM

From the manual: "When you shift into R (Reverse), the rear wiper will turn on to intermittent if the front wipers are activated."

 


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#8 OFFLINE   Ephethean3

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Posted 13 July 2017 - 09:48 PM

From the manual: "When you shift into R (Reverse), the rear wiper will turn on to intermittent if the front wipers are activated."


Is that only if you have the auto sensing option? I don't and mine does run sometimes. I will have to experiment with putting it into reverse though to see if that causes it.

#9 OFFLINE   Plus 3 Golfer

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Posted 14 July 2017 - 03:51 AM

Is that only if you have the auto sensing option? I don't and mine does run sometimes. I will have to experiment with putting it into reverse though to see if that causes it.

I usually don't leave auto sensing on but the times I forget to turn it off, I'm fairly sure that with auto sensing on, if I back out of the garage when raining, both front and back wipers come on.  As soon as you shift to D, the rear stops.   I do know that if in reverse and I turn on the front wiper for one swipe, the rear will also run one swipe.


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#10 OFFLINE   Ephethean3

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Posted 14 July 2017 - 09:33 PM

It was a nice rainy day today so I did some testing. I tested it each time I started out. After starting the car I would turn on the front wipers then while watching thread wiper I put the car in reverse. Each time I did the rear wiper would cycle once. It wasn't in reverse long enough for me to see if it would cycle like it was in intermittent mode just like you quoted from the manual. I guess that I still can learn something new each day. Thanks for the info.
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