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Glenn 911
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Glenn 911's post in PCM 2 CDC 4 Problem was marked as the answer
Problem Solved !
What I learned along the way :
With the cd changer out of the loop the MOST bus was interrupted. I was getting a tv, cd changer amp fault. I built a Digital audio loopback connector and was able
able to restore audio. Still getting the TV and cd changer fault. I was testing the input leads and could not detect power coming to the cd changer. I found a blown
fuse in the E row 6 or 7 I believe a 7.5 amp fuse. I replaced the fuse and connected the new changer power and MOST bus, started the car and everything worked.
I didn't have to get a recode on the swapped out cd changer it worked fine.
I still get the TV fault, I have no idea what that is indicating based on what I've learned and from everyone's input possibly a backup camera was coded into the system.
I'm having issues with the NAV not finding satellites and Clocks not setting , which I've had since we bought the car but those issues are for another day.
It's amazing how much fixing the radio cleared up the "static" generated when the passenger seat is occupied ....... ;)
Thanks to JFP in PA, Loren and wross996TT for your assistance !