Hello! I didn't want to crowd the title. The whole problem is that when I need to charge my Bluetooth device, I plug it into the charger that I have in the cigarette lighter port. When I do that, if I want to use the Bluetooth device again but without having to charge it, the radio display says "no disc loaded" when I hit the AUX/CD button.
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tl:dr - I have to plug my Bluetooth receiver into the charging port in order for the radio to recognize the device as plugged in to the AUX port.

 

What device are you using?

Typically they do need to stay powered to provide bluetooth capabilities.