If your TV has audio OUT and the stereo has audio IN then you just need to run the cable. It might be easier to use the headphone jack on the TV and plug into the plug in to the input at the front of the stereo if its there. Depends on model
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.