Whether your an expert Hummer H2 mobile electronics installer, Hummer H2 fanatic, or a novice Hummer H2 enthusiast with a 2003 Hummer H2, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2003 Hummer H2 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 2003 Hummer H2 headlight bulb size you need for your low beam or high beam and save time. Also, find your other car light bulb sizes including your fog light, reverse light, turn signal, brake light and more. It’s that easy!
The Modified Life staff has taken all its Hummer H2 car radio wiring diagrams, Hummer H2 car audio wiring diagrams, Hummer H2 car stereo wiring diagrams, Hummer H2 car radio wiring schematics, Hummer H2 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 2003 Hummer H2 part or component.
Feel free to use any Hummer H2 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 Hummer H2 wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2003 Hummer H2.
Questions
If you have any questions pertaining to the audio system in the 2003 Hummer H2, 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.
2003 Hummer H2 Car Radio Wire Guide
| Application | Wire Color |
|---|---|
| Car Radio Battery Constant 12v+ Wire | Orange |
| Car Radio Accessory Switched 12v+ Wire | N/A |
| Car Radio Ground Wire | Black/White |
 Use a Car Radio Wire Harness and Car Radio Dash Kit for an Easy Car Radio Install! |
|
| Car Radio Illumination Wire | N/A |
| Car Stereo Dimmer Wire | N/A |
| Car Stereo Antenna Trigger Wire | Gray |
| Use an Amp Integration Harness to Connect Your Factory Amplifier to an aftermarket radio. |
|
| Car Stereo Amp Trigger Wire | Pink |
| Car Stereo Amplifier Location | Under the Center Console or Behind the Glove Box |
| Add a Car Amplifier to Upgrade Your Car Audio! |
|
| Car Audio Front Tweeter Size | N/A |
| Car Audio Front Tweeter Depth | N/A |
| Car Audio Front Tweeter Location | N/A |
| Add Car Tweeters to Upgrade Your Car Audio! |
|
| Left Front Tweeter Positive Wire (+) | N/A |
| Left Front Tweeter Negative Wire (-) | N/A |
| Right Front Tweeter Positive Wire (+) | N/A |
| Right Front Tweeter Negative Wire (-) | N/A |
| Use a Bluetooth Audio Transmitter for Easy Bluetooth Connection! |
|
| Front Speakers Size | 6 1/2″ Speakers |
| Front Speaker Depth | 3″ |
| Front Speakers Location | Doors |
| Use a Speaker Wire Harness for Easy Speaker Installation! |
|
| 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 |
| Use a Bluetooth Audio Transmitter for Easy Bluetooth Connection! |
|
| Rear Speakers Size | 6 1/2″ Speakers |
| Rear Speaker Depth | 3″ |
| Rear Speakers Location | N/A |
| Use a Speaker Wire Harness for Easy Speaker Installation! |
|
| 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 |
| Use a Steering Wheel Control Adapter to Keep Your Steering Wheel Controls. |
|
One Response
im installing an alpine 305s in my 03 hummer h2 via the GM interface required to run the bose sound system. when connecting the 4 speaker RCA’S into the back of the alpine deck, the volume seems to top out at a very low volume, and doesnt seem to start producing any sound till about the 70% volume mark. i was told that the speaker wires from the alpine wire harness are the “high output” speaker wires and that the RCA’S are the low output speaker wires, and that the high output speaker wires need to be spliced into the speaker wires of the hummer.. my question is what wires are those? and are they before or after the GM interface? anyone?