Grumpygit

Many thanks for the quick response, we will have a look at this tomorrow. My son isn't 100% sure if the wipers are on or off when this happens. The car has been used very little over the past few years, and when we picked it up the passenger side door speaker was not working. I have MGF Trophy, and have all sorts of bits lying around, a speaker being one. So popped the door card off, and removed the offending speaker to find corrosion on the terminals. So sprayed with electrical contact cleaner, problem solved. So I may disconnect the battery and clean all the connections to the BCU (Pektron Magic Box), and see if that improves matters.