Do I need to hook up the illumination wire?
The illumination wire adjusts the brightness of the display on an aftermarket radio’s faceplate. This function is governed by whether or not the vehicle’s lights are turned on. This is not mandatory for proper stereo operation, so many installers leave it unhooked for maximum display brightness.
Is the illumination wire positive or negative?
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.
What color is the illumination wire?
What color is the illumination wire? The wire that shows less than 12V at that point is the dimmer/illumination wire. Most aftermarket head units usually use an orange wire or an orange wire with a white stripe for this.
What does ACC 12V B+ mean?
What does ACC 12V B+ mean? The Red to ACC B+ The B+, which has power at all times, connects to the yellow wire to maintain the memory, and the ACC B+, which has power when the ignition switch is in the Aux and On position, connects to the red so that the radio turns off when the ignition switch is Off.