Car Stereo Radio Wiring Diagram – 2004 Hyundai Elantra

Whether your an expert installer or a novice enthusiast with a 2004 Hyundai Elantra, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 2004 Hyundai Elantra.

The Modified Life staff has put their heads together to create an invaluable resource containing car stereo wiring diagram, car wiring diagram and radio wiring diagram. Feel free to use any 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. 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 2004 Hyundai Elantra.

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

2004 Hyundai Elantra Car Stereo Radio Wiring Diagram

Radio Constant 12V+ Wire: Red
Radio Switched 12V+ Wire: Yellow
Radio Ground Wire: Black
Radio Illumination Wire: Dark Green/White
Radio Dimmer Wire: Dark Green/Black
Radio Power Antenna Trigger Wire: Gray/Orange
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): White
Left Front Speaker Wire (-): Brown
Right Front Speaker Wire (+): Green
Right Front Speaker Wire (-): Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): Yellow
Left Rear Speaker Wire (-): Black
Right Rear Speaker Wire (+): Orange
Right Rear Speaker Wire (-): Blue

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  • Reply NevynPA February 16, 2010 at 4:19 pm

    Front speakers are in the doors, 6-3/4″ diameter rounds. 2.25″ maximum depth.

  • Reply ModifiedLife February 23, 2010 at 3:45 pm

    NevynPA, thanks for the 2004 Hyundai Elantra speaker size information contribution!

  • Reply julie November 4, 2010 at 8:13 am

    had a professional install a cd/stereo in my 2004 elantra. the stereo works great but now I have no dash lights, my TCS is off and when I turn on my headlights, the light display for the clock turns off! I am having a hard time convincing the guy that he missed something! Do you have any suggestions? Thanks for any help you can provide. Julie

  • Reply ModifiedLife November 9, 2010 at 1:40 am

    Julie, it sounds like your installer did not wire up the illumination wire on your 2004 Hyundai Elantra stereo. The illumination wire is sometimes tied into your dash lights. Hope this helps. Good luck with troubleshooting your 2004 Hyundai Elantra stereo install.

  • Reply Brettle December 10, 2010 at 3:29 pm

    I just installed a pioneer radio into a 2004 Elantra. I’ve saved radio stations by programming, but after turning off the switch in the car, then restarting, the stations are not saved. This was true of the radio I just took out of it. Any ideas on why this happens? Is it a wiring issue? I’ve tried everything.

  • Reply ModifiedLife December 16, 2010 at 3:47 am

    Brettle, you may have mixed up the battery constant and accessory switched wires. The battery constant always sends power to the radio to save your radio stations and other audio settings. The accessory switched wire sends power to your radio only when the key is in the ignition and your 2004 Hyundai Elantra is on. Check your wiring and make sure the correct radio wires are hooked up to the correct wires on your factory harness. Hope this helps. Good luck with your 2004 Hyundai Elantra radio installation.

  • Reply cg March 26, 2011 at 11:39 am

    There is something very wrong with the ground wiring in my 04 Elantra. FM is fine, but AM is aweful (need this for baseball!). It sounds perfect when the car isn’t running, but as soon as the car starts, you can barely hear a thing. Where does the ground wire run to? Do you think I can trace it to find a short or the connection point to the frame? Any ideas are welcome.

  • Reply ModifiedLife March 30, 2011 at 6:08 pm

    CG, you can always try taking the radio ground wire from the back of your radio and grounding it to the chassis to make sure your ground is good. Hope this helps. Good luck with your 2004 Hyundai Elantra troubleshooting.

  • Reply logan October 30, 2011 at 6:21 pm

    what color is the illumination wire? im haven the same prob with my dash lights. anyone?

  • Reply ModifiedLife November 8, 2011 at 4:05 am

    Logan, the 2004 Hyundai Elantra illumination wire is the dark green/white wire located at your factory stereo wiring harness. Hope this helps. Good luck with your 2004 Hyundai Elantra stereo install.

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