Recently I had a problem with my Xsara sx where I pull the trigger for the front screen wash and the back screen wash would go. I researched the problem but couldn't find a solution, so took the car to a garage fearing it may be an electrical problem with the pumps. Luckily it was just a blocked pipe. That could probably be solved at home if you can get to the pipes (or have some compressed air). And luckily I took it to a non-dealer garage first to check (costing £15), where as my local citroen dealer said it was going to cost £50 just to diagnose this small problem. Just thought I'd post this in case anyone has similar symptoms. Tom