I have a problem with the wiper blades and front screen wash pump not working. When they do start to work, the pump will only work straight after the engine is started. The wiper blades will come on and stay on!! To do a single sweep of the windscreen, the stalk must be held down rather than pressing it down once. Then after a while driving all is well. I went to Vauxhall this morning and they reckon a fuse has gone. I'm not convinced but checked the owners manual for the right fuses to buy. When i looked at the fuse box, there is a 7.5A fuse in slot 12, which according to the handbook should be 30A. I haven't fitted the fuses yet as everything is now working fine and I will have no clue if I've fixed the problem. Has anyone else experienced this, or know a likely cause / solution?