I've found similar issues on here but nothing that matches mine. Up until recently neither the front or rear windscreen wash worked. I changed the dual output pump in front wheel arch and for a couple of days this cured the problem. Now the front windscreen washer is not working. The rear one is fine, you can here the motor going and the obvious spray of water but when you pull the stalk for the front only the wipers move you get no water and you cannot hear the pump running. Any ideas? I don't think it is the comm 2000 as the wipers still work on the delayed timing circuit after you pull the stalk. I suppose it could be a blocked pipe but you'd still hear the pump. Also it could be the cheap (fleabay) pump failing but It sill works for the rear. Basically I'm at a loss!!