Sorry mate, didnt mean to come over as such an ar$e. if it starts with cables in place of earths it has to be an earth or two that have failed, remember they are quite simple beasts really so dont worry about making the old one good right now just bang a fresh one on somewhere that does the same job as the temp jump lead solution to keep you going then you can spend the time finding the shagged one and replacing it, more is better with earths