Hi,

The drivers side windscreen wiper jet doesn't squirt whereas the other one does. I assume they're powered by the same pump? So I'm guessing I'm looking at either a blockage or a leak.

Is there a standard processes for getting to the bottom of this problem or any places which are expected to fail?

 

They come off the same line, so I would assume that you have a clogged nozzle. Maybe try putting a small wire from a torch tip cleaner through it, will open things up again. I also think there might be a one way valve on the short line to each sprayer. They fail a lot. I usually just shove something through it, if it doesn't clean up with a bathroom cleaner, that removes calcium....good luck....Mike

 

prob clogged. as I am to understand the line from the holding tank tank comes into the cowl, there is a check vavle T there that the two lines for the wipers come from.