Fitted my Pioneer DEH 4300 head unit today. Sounds great! However, I had to buy a PC5-90 aerial converter but I can't get it to work. The Tuner part of the head unit just doesn't work at all and I can only play CD/MP3. The instructions that came with the PC5-90 were pretty ****. Connecting the aerial up is fine but it's the additional blue witre that's causing the problem I think. I'm not sure I connected it to the right place. The instructions say "EITHER attach the white wire to the number 5 position in the ISO block (antena line output feed) OR connect it to the blue wire already in this position. Thing is, there is no white wire that I can see. The system I had was the full BOSE concert system with the big amp next to the CD multichanger in the boot, so it's like spaghetti at the headunit end. Can't work out what to do. Can anyone give me any ideas where this blue wire on the PC5-90 goes please?