I have a 2005 King Ranch F350 dually, the radio/6 pack cd player has quit completely dead no clock have checked 20 amp fuse under steering column it is okay any suggestions?

 

Also check the fuse F2.42 (15amp) in the central box.. It's the fused voltageoutput feed off of the accessory delay relay.. Do the power windows still function when the key is cycled off (after running or switched ON) if the door isn't opened? Steering wheel function controls ?