2004 Pontiac Grand Prix Car Stereo Wiring Diagram

Whether your an expert Pontiac Grand Prix mobile electronics installer, Pontiac Grand Prix fanatic, or a novice Pontiac Grand Prix enthusiast with a 2004 Pontiac Grand Prix, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2004 Pontiac Grand Prix vehicles are becoming increasing more difficult to identify due to the installation of more advanced factory oem electronics.

One of the most time consuming tasks with installing an after market car stereo, car radio, satellite radio, xm radio, car speakers, tweeters, car subwoofer, crossovers, audio equalizer, car amplifier, mobile amp, car amplifier, mp3 player, ipod or any car audio electronics is identifying the correct color car audio wires for your 2004 Pontiac Grand Prix.

The Modified Life staff has taken all its Pontiac Grand Prix car radio wiring diagrams, Pontiac Grand Prix car audio wiring diagrams, Pontiac Grand Prix car stereo wiring diagrams, Pontiac Grand Prix car radio wiring schematics, Pontiac Grand Prix car wiring diagrams and cataloged them online for use by our visitors for free. Our automotive wiring diagrams allow you to enjoy your new mobile electronics rather than spend countless hours trying to figure out which wires goes to which 2004 Pontiac Grand Prix part or component.

Feel free to use any Pontiac Grand Prix 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 Pontiac Grand Prix wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2004 Pontiac Grand Prix.

Questions

If you have any questions pertaining to the audio system in the 2004 Pontiac Grand Prix, please feel free to post it at the bottom of this page and either we’ll do our best to find you the information you need or hopefully someone in the Modified Life community will have the information you’re looking for.

Request a Car Stereo Wiring Diagram

If you can’t find a particular car audio wire diagram on Modified Life, please feel free to post a car radio wiring diagram request at the bottom of this page and we’ll do our best to find you the diagram or schematic you need for your mobile audio installation.

Adding More Information

If you would like to help the Modified Life community by adding any missing information or adding a new car audio wire diagram to our resource, please feel free to post it at the bottom of this page.

2004 Pontiac Grand Prix Car Stereo 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 or ignition switch harness for switched power.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Violet
Car Stereo Dimmer Wire: Violet
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: Located under the center of the rear deck.
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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15 Comments

  • Reply Jason October 1, 2008 at 12:02 am

    I want to play my mp3 player in my car using an Audio In cable. Would it be possible to find an Audio In port on the back of my stereo? How difficult would it be to take the dash apart to get to the stereo? Thanks, Jason

  • Reply ModifiedLife October 2, 2008 at 5:34 pm

    Jason, some vehicles can play an MP3 player using the audio in cable but it may require some external module or special wiring. Unfortunately, we don’t have the specific information you’re looking for but maybe someone from the Modified Life community can post that information here. Hope this helps. Good luck.

  • Reply ben October 18, 2008 at 4:40 pm

    it is not that hard but Modified Life was right, it needs special wiring. sorry.

  • Reply Brent January 31, 2009 at 5:36 pm

    I was just analyzing the wiring behind my factory radio to ensure that I received the correct wiring harness to hook up my Pioneer radio. I noticed that there was another set of wires running into the factory unit. Are these special wires that need to be considered or are they just the wires that run to the radio controls on the steering wheel?

  • Reply AJ King April 22, 2009 at 5:18 pm

    I’m trying to install an aftermarket amp/subwoofers to my 05 Grand Prix GTP, factory deck. where is the best place to connect the lead wire from the aftermarket amp? Any correct information would be greatly appreciated.

  • Reply ModifiedLife April 28, 2009 at 1:17 am

    AJ King, technically you could connect your 2005 Pontiac Grand Prix amplifier turn on wire to the radio switched 12v+ wire. That way your amplifier is on whenever your 2005 Pontiac Grand Prix is on and off whenever your 2005 Pontiac Grand Prix is off. Just make sure to run an in-line fuse holder with a 1-amp fuse on the amplifier turn on wire. Hope this helps. Good Luck.

  • Reply Chuck Murphy July 19, 2010 at 11:22 pm

    I have a 2005 Pontiac Grand Prix, The right rear speaker isn’t working and when I started to follow the wiring FROM the speaker I found that it is connected to a small box which is snapped to the rear deck about 8 inches away from the speaker. This small box is not connected to anything else and has no other plugs on it thus meaning that the speaker is not hard wired to the sound system. Any input would be greatly appreciated. Thanks, Chuck

  • Reply Pete August 6, 2010 at 3:16 am

    I got a 04 grand prix… im trying to get a clarion head unit… i ordered the interface for the chimes and all that… need help on wiring the harness from the stereo to the interface and help will be much appreciated!

  • Reply justin September 9, 2010 at 5:34 pm

    I’m trying to find out if the wiring for the 04 grand prix is the same as the 07. If not is there anyone that can tell me which wire is the constant and which one is the ground?

  • Reply ModifiedLife September 13, 2010 at 7:30 pm

    Justin, ask and you shall receive: 2007 Pontiac Grand Prix Car Stereo Wiring Diagram

  • Reply bryan November 9, 2010 at 4:41 pm

    does anyone know what color the 2 wires are for the steering wheel controls. i need the data and the ground. i cant seem to find them.

  • Reply ian June 1, 2011 at 11:00 pm

    when putting in new rear speakers since gm runs a positive and negative for highs and lows. would i put both positives and both negatives together since my new speaker is a 4 way and only has one neg and one positive tab or would i just run one of the freq set?

  • Reply rick August 6, 2011 at 6:24 pm

    I have the same question as IAN. I have an 2004 pontiac grand prix with the monsoon system. “when putting in new rear speakers since gm runs a positive and negative for highs and lows. would i put both positives and both negatives together since my new speaker is a 4 way and only has one neg and one positive tab or would i just run one of the freq set?” anyone?

  • Reply dj November 6, 2011 at 7:06 pm

    could i hook up aftermarket amplifier and subwoofers on my 2004 pontiac grand prix using the factory deck?

  • Reply ModifiedLife November 17, 2011 at 7:27 pm

    DJ, yes you can hook up your an amplifier and subwoofer to your stock stereo. You will need some aftermarket electronics to hook up a subwoofer to your 2004 Pontiac Grand Prix factory stereo. You will need five components:

    1. Car Subwoofer
    2. Car Subwoofer Box to house your car subwoofer.
    3. Car Audio Amplifier that matches your subwoofer power needs and ohm rating.
    4. Car Amplifier Wiring Kit that can handle the power needs of your amplifier.
    5. RCA Line Out Converter to feed an audio signal from your factory radio to your aftermarket amplifier.

    First run all your amplifier power from your car battery to where you plan on mounting your amplifier. Next, run your ground wire from your grounding point to your amplifier. Wire up the RCA Line Out Converter to the rear speaker wires to get a full range audio source. Next, connect one end of your RCA jacks to the Line Out Converter and the other end of the RCA jacks to your amplifier. This will provide an audio signal to your after market amp. Lastly, connect your subwoofer to your after market amplifier using the speaker wire in the amplifier wiring kit. If you’ve never installed car audio before, we advise you to take your car to an experienced mobile audio installer. Hope this helps. Good luck with your 2004 Pontiac Grand Prix amplifier and subwoofer installation.

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