Whether your an expert Audi electronics installer or a novice Audi enthusiast with a 2002 Audi A4, a car stereo wiring diagram can save yourself a lot of time. One of the most time consuming tasks with installing an after market car stereo, car radio, car speakers, car amplifier, car navigation or any car electronics is identifying the correct color wires for a 2002 Audi A4.

The Modified Life staff has taken all its Audi car radio wiring diagrams, Audi car stereo wiring diagrams, Audi car radio wiring schematics, Audi car wiring diagrams and cataloged them online. Feel free to use any Audi car stereo wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most of the diagrams listed on our enthusiast website are submitted by the Modified Life community. Use of the wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2002 Audi A4.

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2002 Audi A4 Car Stereo Radio Wiring Diagram

Car Radio Constant 12v+ Wire: Red/White
Car Radio Switched 12v+ Wire: Black/Blue
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Gray/Blue
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Blue/White
Left Front Speaker Negative Wire (-): Brown/White
Right Front Speaker Positive Wire (+): Red
Right Front Speaker Negative Wire (-): Brown/Red
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown/White
Left Rear Speaker Negative Wire (-): Blue/White
Right Rear Speaker Positive Wire (+): Brown/Red
Right Rear Speaker Negative Wire (-): Red

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