I have an older Innsbruck and the radio stopped working. I tried to install an new CD/MP3 radio and it did not power up. I then put the old one back in and it did not work either. I have tried to figure out the wiring but there is no owners manual. I tried to follow the wires to figure out where they go because they are not labeled but the only one I could trace is a white wire that goes to something behind the fridge. I changed the fuse in the radio but it did not work. If I knew where to look I could check to make sure the ground and the hot wires were connected. Is it connected to the battery under the sofa? If anyone can help I would appreciate it.