The earth wire to the window wiper motor keeps burning every time I try to start the car. I know that its an earthing problem coming from some where but have looked every where and cant find it. Need help big time cheers.

Start by removing the earth straps from the block to the battery & body and cleaning the points of contact with some emery cloth. There should be no paint in between the cable lug and the body. Smear a light film of vas or grease over the lug, then re-connect it. It's really important that the earths are as clean as possible.

dude cut the black wire and earth it directly to the body, it will iliminate a short in that part of the loom as the earth wont be conected directly to the loom any more