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Many thanks for magicmerlin and AlBags advice. I checked the car out and there is a plate on the edge of the boot and three pins on the boot lid. Out of curiosity I decided to check these out and one of the metal plates, (there's 3 on the plate), was pushed in, I found that one of the plates is an earth, the next one is the inside lighting, and the one which is damaged is the rear screen heater, when I removed the plastic plate I found that the plastic had melted underneath so I got another one from the scrappy and the heated rear screen is working brilliantly now. That's another thing fixed on the car, I managed to get another clock from the scrappy and there was a folder in the scrapped car with booklets which correspond to my wife's car as it was the same reg. I only have the radio to fix now and she'll be o.k.