Its for a reverse backup camera.
The reverse wire in a car stereo system is typically used to trigger specific functions when the vehicle is in reverse gear, such as activating a rear-view camera or enabling parking assist features. This wire is usually connected to the vehicle's reverse light circuit and signals the stereo to switch to the appropriate input or display. Properly connecting this wire can enhance the functionality of the stereo and improve safety while reversing.
your ground wire for the stereo is connected to the ignition wire of the car
the ACC wire from the stereo is connected to constant power (+12V)
The correct GAUGE wire is 28 for a car stereo.
yellow
yes, it is possible
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.
To connect the mute wire for your car stereo, locate the mute wire from the stereo's wiring harness, which is typically color-coded (often gray or blue). Then, connect this wire to the vehicle's ignition or a trigger source, like the accessory wire, to engage the mute function when needed. If your stereo has an external mute function, you may need to connect it to the corresponding mute control wire from the car's audio system or other devices. Always consult your stereo's manual for specific wiring instructions.
the black wire or yellow wire are not connected right
Nothing.
red