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It is red. But to my understanding, it is not a true 12 volt power source. When testing mine, I only get 5.5 volts. You will need to find another source to power the unit.
What color is the mute wire for 2004 chevy silverado?
Yellow wire is your ignition wire.
purple is the trigger wire for the starter. Yellow is the ignition wire.
The ignition wire that run to the cap is red. The one that to the key ignition is blue.
WHAT ARE"89-NISSAN MAXIMA RADIO WIRE COLOR CODES
2003 Chevrolet Silverado Car Stereo Radio Wiring Diagram Radio Constant 12V+ Wire: Orange Radio Ignition Switched 12V+ Wire: Class 2 Serial Data Radio Ground Wire: Black/White Radio Illumination Dimmer Wire: N/A Radio Antenna Trigger Wire: N/A Radio Amplifier Trigger Wire: Pink Front Speakers Size: N/A Front Speakers Location: N/A Left Front Speaker Wire (+): Tan Left Front Speaker Wire (-): Gray Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Dark Green Rear Speakers Size: N/A Rear Speakers Location: N/A Left Rear Speaker Wire (+): Brown Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Dark Blue Right Rear Speaker Wire (-): Light Blue
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PURPLE
Don't know the color of the wire but you will just have to use a test light to see what wire is hot to the radio.
It should be light green with a yellow stripe, it is hot for the memory. The yellow with black stripe is for ignition.