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The rear one works just fine, it's the front one that will not work, even after "priming the pump."
I thought I had the same problem when I firstly got the car, turns out I was doing something wrong.

The indicator/Wiper stork button has 2 stages. The first stage is a quick wipe and the second stage is wash. In my case, the fix was push a little harder, to activate the second stage.

Hope that helps.
 
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