First post be gentle.
Bought 2013 paint set & other items off of cvo ultra & installed on 2009 ultra. used 2013 wiring harness to hook up to rear amp & speakers but radio off of 09. Rear amp & speakers not working. Do i need to use 2013 radio or am I missing something on wiring harness. everything else on bike seems to be working.

 

Radio needs to have the rear speakers turned on. Dealer flash.

 

rear speakers were working with original set up for 09 ultra & fader is there. Do you still think it need flash?