This isn't something we can diagnose over a computer. Most likely something has been changed since the car was new that has caused a sheet metal screw to touch a wire or two wires are rubbing together. The assembly may have been removed at one time and something was shifted to where a terminal on a circuit board is close to touching the roof or mounting bracket. Those are the types of things we would look for.
Monday, February 10th, 2014 AT 6:20 PM