I made the mistake of taking the easy way out and let Carphone Warehouse install a Nokia car kit, with the output from the phone going through the speakers.
On the way home I noticed the speedo wasn't working which I thought was a bit of a coincidence, until I realised of course it's an electronic one. Checked the handbook and it isn't listed against any of the fuses. Eventually found the 15 amp fuse which also supplies the wipers had blown - and it has been blowing at intervals ever since. The car kit still carries on working so it would seem that during installation a wire has been damaged.
So to help track down the problem can any one tell me the colour code of the feed from the fuse up to the speedo/wiper switch. Thanks in advance