Usually in the basics of any head unit installation you need to wire everything according to color... For what your askin the constant wire coming out from your car and coming out from your stereo is yellow so look for that first
Most likely a back up camera hookup.
your ground wire for the stereo is connected to the ignition wire of the car
The remote wire coming out of your car stereo constantly sends a low voltage signal while the stereo is turned on. This is to signal external components such as amplifiers or power antenae to activate. If you don't have these items, the remote wire should be taped off as to not ground out on anything. IF you were wondering where to run the remote wire from your amplifier to a stereo that does not have a remote wire, I would suggest sistering it to the hot wire (red) coming out of the stereo. Make sure that your radio doesn't function without the ignition turned on. If your radio works without the key in the ignition and you have your remote wire from your amp wired to the hot wire on your deck your amp will remain on all of the time wether you're in the car or not. This will lead to a dead battery. Hope this helps Shane (vmax33)
the ACC wire from the stereo is connected to constant power (+12V)
The correct GAUGE wire is 28 for a car stereo.
yes, it is possible
yellow
The illumination wire on a car stereo is meant for the brightness on the display. It is used to adjust the brightness of the display for seeing it during night hours.
Nothing.
the black wire or yellow wire are not connected right
red