Rear wiper motor not working

[redijedidedi]

Audi v6 12v 2.6 the rear wiper motor has no power getting to it. Rear demister not working and rear boot light stays on all the time if left. I have looked at all of the wires and cannot find any breaks. If the demister and interior light are left on the fuse blows when the demister is switched on. The rear wiper motor does nothing but the rear water pump for cleaning works correctly. I find this behaviour very strange.
Does anyone no where the relay for the rear wiper and the demister are to be found.
Many thanx in advance