In the Mazda BK (2004) I only have a radio, no CD player. I wanted to include an additional Bluetooth adapter, I connected it to the connector on the back of the device.
But, I can't select the AUX input.
I press the input selection buttons, FM1/2, LW etc... CD and Media buttons don't respond.
Does anyone have an idea, how to activate the AUX input, how to select the audio signal from the AUX connector? Or is this not possible on a radio device with only a radio receiver, without a CD player?

 

So I simply were given a 2004 Mazda 3.while i was seeing it through Kodi It’s an brilliant car regardless it’s age, but with age manner I can only concentrate to the radio and an slightly going loopy. What will be the high-quality way to feature AUX or Bluetooth capability to the automobile that particularly simple and no longer gonna break the bank? (<$one hundred USD)