If you've got hid headlamps you'll need the washers for mot as well as the adjuster on the rear beam. Best thing to do is first listen for the pump. Headlamps on and within the first cycle pull the washers. You should hear the pump. If you can't hear it, check the fuse, all OK, then remove the jets from the bumper or the pipe directly to the pump in the scuttle and pull again see if waters coming out the pipe to make sure it's not a blocked jet and last but not least check you have 12v down to the pump....if you do then you need a new pump. From experience it tends to be a blocked filter in the tank, knackered pump and most common the balls falling out the end of the jets from blocking causing excess pressure