If it is the fuse as ash says just open your fuse box (open the drivers side door and you will see it on the end of the right hand side of the dash) and pull one fuse out at a time and look at it, if its broken then replace it with a fuse of the same rating (there also colour coded so you cant get it wrong). You can get car fuses from places like halfords motorworld petrol stations poundland etc etc