No diagram for 2019+. This thread may help:Could you share me the wiring diagram for the factory amp and harness please? I have a 2021 mazda 3 without bose and want to add amp and speakers!
Started a new thread since the wiring inputs and outputs are different for the Bose units. This is the harness from the PAC APH-GM02 AmpPro that I'll be using to tap the center and front door speakers. The doors are already hooked up (Orange and Brown) from before, so I just have to add the...
ETA - Oops I read that as with Bose. I think there is a non-Bose diagram in another thread