concert 2 player in an older A6
 

Hi,Can anyone help please..I have put a Concert 2 cd player into my 2001 A6
Avant,but also had to install a CAN Bus simulator to operate the ignition &
illumination.The problem is,it switches off via the ignition OK,but still
no illumination.Any ideas,or where can i obtain a wiring diagram of the
radio set up,showing colors
many thanks
sjfedex