hello all / I have a 2002 k11 micra with a radio that works but with a u/s screen / I also have a similar k11 as a donor car with a perfect radio / I have no codes for either but I want to put the good radio in my good car / I have done some experiments / if I disconnect the battery on either car I do not loose the as when the battery is reconnected the radios both work / I have taken the radios out of the dashboard but left the plugs in place / on the back of both radios there are three plugs/sockets / one is the aerial and there are another two with a few wires connected / if I have the radio playing and pull the large plug out the radio goes off and when reconnected it continues to play / if I pull the small plug out the radio continues to play but if I then switch it off when I switch it back on it says wait on the screen / if I then switch it off put the plug back in then switch it on the radio will play / from all this I conclude that the large plug carries the power and speakers while the small plug carries the signals from or to the security unit / my question is this / before I go any further is there any thing that I can do to get the radio working without a code as It once that you have got it going you can pull out the small plug and it will continue to play until switched off / it seems a bit complicated but read it a few times and tell me what you think / thank you