I'm installing a 4000NEX into a 2015 Subaru WRX. I have the parking brake bypass, ASWC, and Radio wired into a Metra harness. The stereo turns on fine, I get HD radio quickly, but I can't get any sound out of the speakers. I've moved the fader around and still nothing. I've tripple checked the wiring and it seems the speaker wiring is correct. There is no factor amp in the car.
Does this sound like a bad HU? Or is there something messed up with my wiring?