I've been out between the showers and had a look at my electrics. I still can't quite see why the wipers would go for the mechanic who came out yesterday but not for me. Aside from the possibility of an intermittent wiring loom fault, part of my problem may be that the fuse holders have a lot of grey powdery build up. The radio and the heater blower seem to have this problem. I've given them a squirt of electrical cleaner and jiggled them about in their sockets in the hope of making better contact. With some of them, the plastic bit of the fuse is getting brittle and coming to pieces so I've put new ones in. Maybe that'll aid reliability.
