So a few days ago I'm jumped in the car and noticed that the radio screen was solid red. It wouldn't turn on or off. To stop my battery going flat I removed the fuse. A few days later I have removed the radio (symphony) and fitted a Pioneer Double din. My car has full Bose so I used a harness adaptor that plugs into the car and creates Phonos that can be plugged onto the Pioneer front and rear pre outs. I've got an Audi A4 fascia on the way that I intend to "make fit" as no one makes a fascia for the S3. Now I have a problem, the Pioneer wil not turn on! Ive made sure I've put the fuse back in the correct place a million times. Can anyone shed some light?