I want to connect Aux cable to the FM IN and OUT of my car circuit
My car audio doesn’t have the AUX and I want to fix AUX by overriding FM on my car’s audio circuit. I have opened the car’s audio and it has MITSUMI F7424F fm tuner module (22 pin). I am not able to identify the correct pins to solder the AUX + and - so that the AUX input will be overriding the FM input. Can someone please help?