I have backup camera as well, connected to the reverse lights and everything worked fine, very quick screen on when put in reverse with previous OEM head unit. However, when I installed 6000nex, I connected the reverse signal wire to the harness that I bought to bypass amp, and few times, camera worked. but now it does not. i think it's fried.
so basically, I have also been searching but the 'Reverse signal' from Pioneer harness needs to be connected either 'Battery or Ground', so 6000nex would know to power on the camera with 12v when reverse is in. Therfore I'd need to bring a lead