Don, according to Sanyo's website there must be a "head" in your dash that controls the unit...Can you tell us what "head unit" is in the dash that also may be your AM/FM radio tuner?
Chances are this unit will have "mode" on it somwhere....push the mode button and you should see the screen scroll through AM, then FM,then you should see the CD come up...
That's the way mine is....
Maybe tell us a little more,or maybe another 2004 owner can come along as well...
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2019 Grand Design Solitude 380FL fifth wheel
2017 40' Renegade Verona LE LTS (traded)
2018 F150 King Ranch Crew Cab Diesel
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