I installed a Pioneer AVIC-F700bt in my 2010 Nissan 370z using a scosche nn04b harness. I remember there being an orange/black wire on only one of the harnesses, not sure if it was on the pioneer harness or the scosche, but I'm thinking it was on the scosche.
I just went to test out the headunit, and the night/day mode doesn't seem to be working when I turn the headlights on. I have day/night mode set to automatic in the nav settings.
I checked the diagrams, and for the scosche harness, Orange with White Stripe says it's for Dash Light Dimmer/Illumination. For the pioneer harness orange/white says for lighting switch terminal. I know I hooked those up together. But I'm still left with an orange/black wire that doesn't go anywhere. Neither of the scosche/pioneer diagrams list an orange/black wire. I did find a scosche diagram for another vehicle that lists orange/black as Illuminated Ground. I'm not sure where to go from here?