Hi, my car came with the wiper not working. Luckily I pointed it out and they said they would pay me for it to be fixed. First off, make sure the boot contacts are making a connection (The gold plates on the bottom part and the gold 'studs' that push in on the bootlid). Next see that you're getting a voltage to the motor. I did this by taking the cover off, unplugging the wiper motor plug, closing the boot, and from the inside, checking the contacts for a voltage. I think from memory I had a voltage across 1 and 2 when the motor was off, and when turned on, had a voltage across 2 and 3, but not 1 and 2. If you get this, then the fuse is OK, and the motor has had it. Cost me (well, cost the showroom) £25 for another motor from a scrappy, you could probably quite easily get hold of one for less.