2003 Pontiac Sunfire Car Radio Stereo Audio Wiring Diagram

Whether your an expert Pontiac electronics installer or a novice Pontiac enthusiast with a 2003 Pontiac Sunfire, a Pontiac 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 subwoofer, car amplifier, mobile amp, mobile navigation or any car audio electronics is identifying the correct color audio wires for a 2003 Pontiac Sunfire.

The Modified Life staff has taken all its Pontiac car radio wiring diagrams, Pontiac car audio wiring diagrams, Pontiac car stereo wiring diagrams, Pontiac car radio wiring schematics, Pontiac car wiring diagrams and cataloged them online. Feel free to use any Pontiac 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 car audio wiring 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 2003 Pontiac Sunfire.

If you can’t find your car audio wire diagram, car stereo wire diagram or car radio wire diagram on Modified Life, please feel free to post a car wiring diagram request (Car Stereo Wiring Diagram Request Page) and we’ll do our best to find you the information you need for your mobile audio installation.

If you would like to help the Modified Life community by adding a car audio wire diagram, car stereo wire diagram or car radio wire diagram to our resource, please feel free to post any additional car audio information about the 2003 Pontiac Sunfire on this page.

2003 Pontiac Sunfire Car Radio Stereo Audio Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

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  • Reply Tommy April 29, 2009 at 9:59 pm

    Is the radio wiring diagram the same for an 01 sunfire because it shows only the 03

  • Reply ModifiedLife May 6, 2009 at 1:32 am

    Tommy, ask and you shall receive: 2001 Pontiac Sunfire Car Stereo Wiring Diagram

  • Reply Greg July 18, 2009 at 2:09 pm

    I recently installed an aftermarket deck into my 03 sunfire and now it seems to be draining my battery. Any ideas on why this is happening?

  • Reply ModifiedLife July 28, 2009 at 7:02 pm

    Greg, it sounds like you may have mixed up some of your wiring. The double check your wiring, especially your constant wire and switched wire connections. Hope this helps. Good luck.

  • Reply joel April 7, 2010 at 1:47 pm

    on the aftermarket deck im installing into my 2000 sunfire, there is a red wire (ignition wire) how do i/where do i hoook this wire up at into the car. the above diagram says the radio harness doesnt have this wire, and you need it hook it into the fuse box? help please

  • Reply Trevor March 2, 2011 at 12:56 am

    I bought a JVC kd-s17 to put into my 2002 Pontiac sunfire and I need a wiring harness however walmart doesn’t have one. I tried to hook it up wire to wire but it still didn’t work..my original harness has been separated from the wires (in other words cut off) is there anyway to fix it and get my new radio in and working good???

  • Reply Brennan March 12, 2012 at 4:50 pm

    The radio diagram above does not show what the 2 purple wires are or the other black wire that is not the ground wire. also which of the wires would be the radio ignition wire for the 2003 pontiac sunfire? anyone know?

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