I assume when you say add a CD/tuner, you will be adding a radio above the fridge? When the radio is turned off it still draws power save the presets. The radio antenna is powered all the time even without a radio installed.
When I installed my radio I installed a power switch and powered the radio and antenna through the switch to limit the battery drain. Only downside is I lose my presets, but since we are moving around with the trailer it has not been a concern.
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Art & Joyce
Current camper: Motor Home
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