Post #5
Right I got a chance to have a look over this at the weekend.
Took off the relay, and took it apart to inspect it, seemed ok to look at and had no water ingress.
Put it back on and still wasn't working. But I noticed each time I looked at the rear wiper it had moved ever so slightly.
If I ever so slightly plug the relay in (not fully, but literally just offering it up slightly) then the wiper does move ever so slowly, and I could then move the wiper with my hand freely and you could hear the motor working, so I moved it to its normal off position and it stopped there. However, I noticed that when holding the relay like this (so it is not all in) the boot light flickers on and off, and the top brake light would come on and off. When I then pushed the relay all the way in, the boot light goes off completely. And then there was a constant buzzing noise. If I touched the relay, that was vibrating, so I didn't know if this is a sign that the relay is knackered or if it is the motor that is knackered and sending vibrations which I could feel when touching the relay? If that makes any sense?
Anyway, the wiper is in the normal position for now and I have just left the relay unplugged.