try putting a pin in the jets they can get blocked up over time or check the pipe where it runs up the side of the bonnet . for some reason on mine it got kinked when i shut the bonnet and it would not pump
Hey I have ad the same problem, spent last night finding out it was the pump. First I listened and didn't hear the pump going. (btw don't have bonnet fully up when you test as the wipers will hit the bonnet). Next I removed the electrical plug then tested that to earth and when I pulled back on the stalk I got 12v, proving the wires and everything else is good and pump was the problem.