Rear wiper blade operates and so does pump but no water. Instead water comes out of front jets (although front wipers not moving). I am pretty sure that its not a blockage, as I have removed stop light and washer jet assembly and checked it. Curiously when hose was disconnected from jet unit, water gushed out when operated, I reconnected and washer worked for a few seconds then stopped, I checked jet was still clear but no joy. I presume there is a switching device that decides where the water is going ie front or back screen and that this is malfunctioning. Is this correct and if so where is it? (front wash wipe works normally) I hope someone can help and thanks for giving me somewhere to ask - Gwenrick
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