I had the same issue and found the wiring in the back of the Radio was incorrect, The red/white had to be plugged TV's "audio out" to the head unit's "audio in" for playing TV to AUX1. I have sound in the TV and by turning on the tuner by going to AUX1 I have both TV & Ceiling speakers. Either can be turned off independent of the other. 10 minutes max with straightening the wire rats nest I found behind there.
2017 Durango G353KRT 2006 F350SD 6.0 LB Crew
2000 F250SD SRW 7.3 LB Extended Cab Air Bags
2014 Eagle 30.5BHLT (sold)
2007 Layton 245LF (sold)
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