Hellooooo this is Lottie, not Lee this time

It is my day off work today so me and Lee thought we would try and tackle the central locking not working on the boot problem.
We have got into the boot from the inside and opened it no probs, but now after having a lil mess around we are still none the wiser.
So far we have:
1. Checked the wires on the right hand side and everything seems to be fine. there is no obvious signs of damage but we have no way of testing them.
2. The boot lock mechanism was disconnected, so we have sorted that now and now can open boot by the door handle but still not lock it (when i say we sorted it, lee sorted it!

)
3. wiper motor is totally shot... it don't work and when you try to use the rear jets it leaks water everywhere, so we are not using that and i'm guessing thats where this problem came from. (we will replace this or blank it off asap)
4. also have discovered the rear heated screen is not working.
5. we have also WD'd everything just incase too
any suggestions that we could try?
i really wanted to get this sorted over the next couple of days and save money taking it to the garage to be fixed...
Thanks
Lottie