Not sure the reason your speaker system isn’t work as I have a 2004 National Sea Breeze with the overhead speaker they didn’t work with old tube 800 Lb tv. after installing the New LED flat screen I used RCA cables from the TV Output to the Radio RCA input works good but only on two of the four speakers. Hope that helps
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Larry and Sheila 2008 Fleetwood Discovery 39R
Retired U.S. Air Force (SAC) Vietnam Veteran
2022 RAM 1500 5.7 HEMI
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