I am changing the radio on 04 Mazda 6, got single din radio and dash cover, harness adapter but find the 3 buttons for AC connect to a circuit board which is part of the original radio. How do I adapt those three switches (rear window defroster, air intake selector, and A/C)?

 

You need a kit, something like this. Do you have manual A/C or Climate A/C?

Metra 99-7523S Single/Double DIN Installation Dash Kit For 2003-2005 Mazda 6 | eBay

 

I found a used dash cover, bought a Metra 70-7903 harness to connect the new radio to the Bose amp and adding an underseat Kenwood sub since my wagon did not have a subwoofer. Metra does not sell only the adapter for the Climate Control. Does anyone else make one or how can I make my own adapter? I really want to have heat and air.

 

What brand is the "Used dash cover"? Photo?

Do you have manual A/C or Climate A/C?