Hi Michael,
I’m basically trying to do the same as you have but on a 1997 XK8 convertible with the Premium ICE.
Did you ever publish the audio head unit ic10 pin-out? I can’t find this anywhere.
I’m also having problems with the steering wheel audio controls as I can’t seem to find a PY wire as per the Jagrepair electrical guide drawings. Is it a direct feed from the controls or does it go via a control unit?
Any help would be gratefully appreciated!