Question: Where can I find a 2004 Pontiac Grand Prix radio wiring diagram? What are the 2004 Pontiac Grand Prix radio wiring harness color codes?
If you’re planning to upgrade the radio in your 2004 Pontiac Grand Prix or troubleshoot issues with your car stereo, this guide is here to help!
Our comprehensive 2004 Pontiac Grand Prix radio wiring diagram shows all the radio wire harness colors, speaker wire colors, and speaker sizes. Use this head unit pinout guide to help with your car stereo installation or to troubleshoot radio wiring issues in your 2004 Pontiac Grand Prix.
In This Guide
2004 Pontiac Grand Prix Car Stereo Wiring Diagram
This 2004 Pontiac Grand Prix radio wiring chart shows you all the 2004 Pontiac Grand Prix stereo wire color codes and their radio wire functions. This easy-to-follow guide can help you install a new car stereo or figure out problems with your stereo wiring harness and radio setup. If you don’t see the car radio wiring information you’re looking for, please feel free to ask your question at the bottom of this page.
| Car Stereo Wire Function | Wire Color Code |
|---|---|
| Car Radio Battery Wire (Constant 12v+) | Orange |
| Car Radio Accessory Wire (Switched 12v+) | Run a wire from the back of the radio to the steering column or fuse box for a switched power source. |
| Ground Wire | Black/White |
Use a Wiring Harness  and Dash Kit  for an Easy Install! |
|
| Illumination Wire | N/A |
| Dimmer Wire | N/A |
| Antenna Trigger Wire | Violet |
| Car Radio Amp Trigger Wire | Violet |
| Amplifier Location | Car amplifier is located under the center of the rear deck in the trunk. |
2004 Pontiac Grand Prix Speaker Wiring Guide
This 2004 Pontiac Grand Prix speaker wiring chart shows you every speaker wire color and the speaker wire polarity. Use this 2004 Pontiac Grand Prix chart makes it easy to identify each wire and where it connects. If the car speaker wiring information you’re searching for is not listed, please don’t hesitate to ask for it at the bottom of this page.
| Car Stereo Wire Function | Wire Color Code |
|---|---|
| Front Left Speaker Positive Wire (+) | Tan |
| Front Left Speaker Negative Wire (-) | Gray |
| Front Right Speaker Positive Wire (+) | Light Green |
| Front Right Speaker Negative Wire (-) | Dark Green |
| Rear Left Speaker Positive Wire (+) | Brown |
| Rear Left Speaker Negative Wire (-) | Yellow |
| Rear Right Speaker Positive Wire (+) | Dark Blue |
| Rear Right Speaker Negative Wire (-) | Light Blue |
| Use a Steering Wheel Control Adapter to Keep Your Steering Wheel Controls. | |
2004 Pontiac Grand Prix Speaker Sizes and Locations
This 2004 Pontiac Grand Prix speaker guide includes speaker sizes, speaker locations, and helpful info on speaker upgrades. Use this chart to find out what size speakers fit your 2004 Pontiac Grand Prix.
| Application | Speaker Size/Location |
|---|---|
| Dash Center Speaker Size | N/A |
| Dash Center Speaker Depth | N/A |
| Dash Center Speaker Location | N/A |
| Front Tweeter Size | N/A |
| Front Tweeter Depth | N/A |
| Front Tweeter Location | N/A |
| Front Speaker Size | 6-1/2″ Speakers |
| Front Speaker Depth | N/A |
| Front Speaker Location | Front Doors |
| Rear Tweeter Size | N/A |
| Rear Tweeter Depth | N/A |
| Rear Tweeter Location | N/A |
| Rear Speaker Size | 6″ x 9″ Speakers |
| Rear Speaker Depth | N/A |
| Rear Speaker Location | Rear Deck |
| Subwoofer Size | N/A |
| Subwoofer Depth | N/A |
| Subwoofer Location | N/A |
Questions and Answers
If you have any questions about your 2004 Pontiac Grand Prix radio installation, please don’t hesitate to post them at the bottom of this page. We’re committed to finding the answers you need, and members of the Modified Life community may also provide valuable insights into the car stereo information you’re looking for. Don’t hesitate to ask your car audio question; it could benefit others seeking the same answers!
Contribute
Do you want to contribute 2004 Pontiac Grand Prix stereo wire diagram information to benefit the Modified Life community? Feel free to share your insights by posting at the bottom of this page. We will gather any additional information presented below by our community, verify it, and incorporate it into the car radio wiring guide above for easy reference. We are consistently adding new information to improve and update this car stereo wiring guide as it becomes available. We appreciate your contribution in advance!
15 thoughts on “2004 Pontiac Grand Prix Stereo Wiring Diagram”
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
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.
it is not that hard but Modified Life was right, it needs special wiring. sorry.
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?
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.
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.
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
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!
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?
Justin, ask and you shall receive: 2007 Pontiac Grand Prix Car Stereo Wiring Diagram
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.
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?
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?
could i hook up aftermarket amplifier and subwoofers on my 2004 pontiac grand prix using the factory deck?
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.