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Intermittent wipe issue

Started by mikewilson, April 27, 2023, 11:23:30 AM

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My 2014's intermittent wipe has started to behave oddly.  Single wipe, normal and double speed are fine.  If you switch to intermittent (it has automatic wipers as well) it starts off with a normal single sweep but then rapidly (less than a second) moves to normal and then double speed constant.  This is not dependent on the amount of water on the screen and changing the interval with the stalk control makes no difference.

I tried cleaning the windscreen over the sensor rather aggressively with matal polish, in case my habit of using a polymerising wax had built up some for of film over it.  No change.

My thoughts are: wiring issue; connection corrosion; BCM problem.

Anyone have any other thoughts?

Hmm, tricky. Sounds like the sort of thing a faulty capacity could cause.

It's possible that the issue could be with the rain sensor itself. The rain sensor may be faulty, causing it to misread the amount of water on the windshield and switch between speeds incorrectly?

 :nothing:
I drive a Seat Alhambra 1.9Tdi which has 115bhp and an automatic gearbox.

I am happy to help you with all your questions. I am not a qualified mechanic but seem to be better at fixing my car than even the most experienced garages.

I have lots of friends here and very much enjoy talking with you all. Always remember, a motor car is a serious tool and should be treated with respect. Put your safety first, always.

I have no idea.  It behaved correctly for a few minutes the other day - working at an intermittent rate until I changed the rate with the adjuster on the wiper stalk.  Then it went haywire again.  Think I'll try a new wiper stalk first, then build up to the most expensive parts.  That's after I give the wiring a good looking at, once the weather improves.

Happy new King, everyone!

On a 2014 car it's worth plugging in diagnostics to see if that offers any clues before throwing parts at it