So I was driving home the other night and the light of a car with a spanner through it came on and has stayed on. One garage has told me it's the cooling system but 4 others say it's an electrical fault. I've never had it cutting out or anything with lights. The car drives perfect but this light has appeared. The only other thing is it sometimes rattles a wee bit when you turn it on which the garages say it is the timing chain. It's a 58 plate with 71k on it. Anyone know how much a timing chain replacement is? And any idea on an electric fault? I don't understand as it's not effecting any of the electric stuff. The only thing I can think is I had a black box in and they attached underneath the glove box so when they have taken it out could they have damaged anything?