I didn't even think to change the input on the original head unit. That fixed my problem lol. I figured activating AUX was just some background toggle and didn't realize it actually activates the ability to select it. All makes sense now! Thank you, you beautiful soul
I just finished the same install. I am either not seeing my fiber cables that go into the original harness or they aren't there. Because of this, I'm not getting any audio input. I will say that I have the base model 2.0 and it IS a different head unit than the 3.0.
Also, with the Ali-Express...