I'm hoping for some general audio expertise. I'm trying to install a new Joying stereo system, but I'm feeling out of my depth when it comes to some of the wires for my aftermarket accessories.
I consulting Joying, who said to stick with the harness for my car's stock stereo (2014 BRZ Limited). I have an existing backup camera and amp though, so there are a few wires I'm uncertain about.
The black is a ground that I'll likely need to splice into one of the black wires in the harness, as was the case with my last Pioneer unit.
The blue seems like it should connect to the (only) loose blue wire on the harness, but that wire is labeled "Brake" and I had though that my blue wire was an amp power trigger.
The green and red wires are somewhat mysteries to me. I think green is a reverse trigger and red may be reverse camera power. I'm at a loss as to what to do with these. On the harness, the "amp 2017-2017 / 2018-2021" wires and the AMP CTRL wires are the only ones that are unused. The former route through the "CAN BUS DECODER." At this point, I'm wondering if I can splice these remaining wires in, or if I need a new harness entirely. Any input is appreciated!