After a few electricutions and whirrs from the CD player, me and my friend kinda decided that was the case, stripped down an old ethernet cable that had been broken on one end, and used one of the cables inside to attach the earth on the Head unit to a piece of metal just inside the bay where it sits, taped on with some electrical tape.
Now working like a charm minus the radio but thats because I can't afford an antenna adapter at the moment so it's got no ariel connected, so that's an easy fix.
Thank you for your help 
