How do you wire a Metra wiring harness?

From the aftermarket radio to the wiring harness: Connect the Black wire to the ground wire. Connect the Yellow wire to the battery wire. Connect the Red wire to the accessory wire. Connect the Gray wire to the right front positive speaker output. Connect the Gray/Black wire to the right front negative speaker output. Click to see full answer. Subsequently, one may also ask, do you need a wiring harness for an aftermarket radio?A DIN cage or mounting bracket may be necessary to secure the stereo to your dash. You should also purchase a wiring harness adapter so that you can plug your new stereo into your car’s electrical system.Beside above, what do I connect the illumination wire to? In short, the illumination wire on a car stereo wiring harness is used to dim the screen on your aftermarket car stereo. The wire is connected directly to your instrument cluster and provides a negative trigger or positive trigger that tells your radio when you turn on and off your headlights. Consequently, where does the yellow wire go on a car stereo? The red wire is for the 12 volt ignition, which can be attached to the stereo. The yellow wire is the 12 volt battery wire, which should also be attached to the stereo for power. The final wire, the black wire, is the ground wire. This wire, once attached to the stereo, will help ground it.What is the orange and white wire in a car stereo?The normal use of orange and orange/white wires is orange is for variable voltage to control display illumination dimming (i.e. the head unit display dims along with the other dash lights) while orange/white is a simple on/off signal of whether the dash lights are on (the head unit has only bright and dim display