I would like to upgrade the HU650 in my 2006 XC70 to a HU850, (not sure what format it can play).
The question is does Volvo put in a different wiring harness when building the car or is it one harness will fit both styles of radios?
If the wiring harness are different where can I find a wiring diagram to install myself?
Jack, I just swapped the HU-613 out of my 2001 V70 T5 for another one but now the steering wheel audio controls no longer work. I am wondering if you've run across this while doing your swap. Thanks!