Here is the solution from Jensen tech:
Thank you for contacting ASA Electronics. Try choosing the AUX mode. Typically the OEM will connect and use the AUX inputs on the radio to play the Audio through the stereo system. If it is not activating, check your TV Menu, under Audio, turn your TV speakers OFF and try again.
Let me know how this goes. Here is a link to the manual for reference. http://www.jensenrvdirect.com/downlo...rs_manuals.pdf
Thank you for allowing us to assist you today!
Technical Service, ASA Electronics