Whether your an expert installer or a novice enthusiast with a 2003 Subaru WRX, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 2003 Subaru WRX.
The Modified Life staff has put their heads together to create an invaluable resource containing free car stereo wiring diagram, free car wiring diagram and free radio wiring diagram. Feel free to use any car stereo wiring diagram or factory radio wire colors that are listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind. 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 2003 Subaru WRX.
If you can’t find your car radio wiring diagram, factory radio wire colors or stereo wire diagram on Modified Life, please feel free to post a car wiring diagram request (Radio Wiring Diagram Request Page) and we’ll do our best to find you the information you need for your mobile installation.
2003 Subaru WRX Car Stereo Installation Diagram
Radio Constant 12V+ Wire: Blue/Red
Radio Ignition Switched 12V+ Wire: Yellow/Green
Radio Ground Wire: Black
Radio Illumination Dimmer Wire: Purple
Radio Antenna Trigger Wire: N/A
Radio Amplifier Trigger Wire: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): Brown/White
Left Front Speaker Wire (-): Green
Right Front Speaker Wire (+): Red/Yellow
Right Front Speaker Wire (-): White/Black
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): White/Red
Left Rear Speaker Wire (-): Red/Black
Right Rear Speaker Wire (+): Blue/Yellow
Right Rear Speaker Wire (-): Red/White