Nothing has been moved, it just failed to come on one day and there is voltage on F8 just not on the output for the radio. I think I am going to have to cut my losses and install another radio and satnav separately
Thanks to your connecting plug diagram I know which leads go where. The yellow permanently live lead is so I can connect it to that which means I can use it with the ignition off
I have come to the conclusion that this problem is almost insurmountable from what I have read but at least the car drives OK, even the aircon works! Thanks very much for all your help - hope I don't have to bother you again.
Peter