2003 Cadillac CTS Car Audio Wiring Chart

Whether your an expert Cadillac CTS mobile electronics installer, Cadillac CTS fanatic, or a novice Cadillac CTS enthusiast with a 2003 Cadillac CTS, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2003 Cadillac CTS 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 Cadillac CTS.

The Modified Life staff has taken all its Cadillac CTS car radio wiring diagrams, Cadillac CTS car audio wiring diagrams, Cadillac CTS car stereo wiring diagrams, Cadillac CTS car radio wiring schematics, Cadillac CTS 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 Cadillac CTS part or component.

Feel free to use any Cadillac CTS 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 Cadillac CTS wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2003 Cadillac CTS.

Questions

If you have any questions pertaining to the audio system in the 2003 Cadillac CTS, 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 Cadillac CTS Car Audio Wiring Chart

Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Run a wire to the steering column and use the brown wire in the ignition switch harness.
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: N/A
Car Stereo Power Antenna Trigger Wire: N/A
Car Stereo Amp Turn-On Trigger Wire: N/A
Car Stereo Amplifier Location: Left Side of the Trunk

Car Audio Front Tweeter Size: 1″ Tweeters
Car Audio Front Tweeter Depth: 1″
Car Audio Front Tweeter Location: N/A

Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Yellow
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Purple

Car Audio Front Speakers Size: 6 1/2″ Speakers
Car Audio Front Speakers Depth: 3 1/5″
Car Audio Front Speakers Location: N/A

Left Rear Speaker Positive Wire (+): White
Left Rear Speaker Negative Wire (-): Tan
Right Rear Speaker Positive Wire (+): Orange
Right Rear Speaker Negative Wire (-): Tan

Car Audio Rear Speakers Size: 6 1/2″ Speakers
Car Audio Rear Speakers Depth: 4″
Car Audio Rear Speakers Location: N/A

Car Subwoofer Speaker Size: 8″ Subwoofer
Car Subwoofer Speaker Depth: 4″
Car Subwoofer Speaker Location: N/A
Car Subwoofer Speaker Positive Wire (+): N/A
Car Subwoofer Speaker Negative Wire (-): N/A

The 2003 Cadillac CTS radio wire color information above is updated as it is submitted by the Modified Life community.

4 Comments

  • Reply roy July 7, 2011 at 7:48 pm

    my radio and cd will come on but there is no sound.

  • Reply ModifiedLife July 7, 2011 at 7:58 pm

    Roy, first double check ALL your fuses and make sure ALL your fuses are good. You can do this by using an Automotive Fuse Tester and making sure all of your fuses are not blown. If all of your fuses are good, your 2003 Cadillac CTS may have a factory amp that needs to be turned on by your after market radio. The car radio amplifier trigger wire has to be wired up to turn on your factory amplifier to output sound from your speakers. We currently do not have any information on the 2003 Cadillac CTS amplifier turn-on wire but hopefully someone from our knowledgeable Modified Life community would be able to chime in and help you out.

  • Reply Kyle Brandt July 11, 2013 at 2:52 pm

    I’m trying to hook up a amp but there are no places to hook up the 2003 Cadillac CTS turn on wire.

  • Reply ModifiedLife August 14, 2013 at 2:13 am

    Kyle, technically you could connect your 2003 Cadillac CTS amp remote wire to the stereo switched 12v+ wire. That way your amp is on whenever your 2003 Cadillac CTS is on and off whenever your 2003 Cadillac CTS is off. Be sure to run an in-line fuse holder with a 1-amp fuse on the amp remote wire. Hope this helps. Good luck with your 2003 Cadillac CTS amp install.

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