trouble shooting sirius problem w f90bt

I have a Pioneer F90BT in a 2007 Dodge Ram. I am using the SCC1 and CD-SB10 to get the signal to the head unit. It has been working flawlessly for about a year and a half and all of a sudden I no longer have audio. The F90BT still works with fm/am/cd/dvd/ipod/etc. With Sirius it shows the channel, the song title, artist and etc but no sound. So I can tell what is playing but can't hear it. I don't want to start replacing everything if I can determine which particular component is causing the problem. I have checked all of the connections and they are fine. I did the initial install and have not had any issues over the time period. Any feedback or advice is appreciated.

Well if the radio seems to be in working order and you have audio from other sources, you will have to start replacing equipment one by one. I'd start with the cables first.DTS Performance

St Petersburg, FL