Radio signal + Perm live supply

I have a 94 k11 and have had problems with the ICE since I bought it.

1 The original radio needs a code, but no sticker on the side so no chance of getting it sorted?

2 I have been using a Kenwod CD, It gave great sound through Pioneer speakers in a volvo. It now has a problem in that it will not store radio station presets and the cd rejects when I turn on the ignition.

I thought there was a perminant live wire, what colour wire is this supply and what fuse supplies it?

3 I also have lost the radio signal, is it possible to check it without another radio.

4 Are the standard rear speakers any good and worth buying s hand ready mounted on the shelf

5 Is there a good ICE site out there for info
 
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