2004 Kia Optima Radio Wire Harness Guide

2004 Kia Optima Radio Wiring Diagram

Knowing your 2004 Kia Optima radio wire colors makes it easy to change your car stereo. Our 2004 Kia Optima radio wiring guide shows you how to connect car radio wires and helps you when your car radio wires not working. It also shows you the car radio wire to battery, which wire is positive, what is car radio illumination wire and more.

Application Radio Wire Color
Car Radio Battery Wire (Constant Power 12v+) Pink
Car Radio Accessory Wire (Switched Power 12v+) Pink
Car Radio Ground Wire Black
arrow Use a Car Radio Wire Harness and Car Radio Dash Kit for an Easy Install!
Car Radio Illumination Wire Red
Car Stereo Dimmer Wire Black
Car Radio Antenna Trigger Wire Green/Black
Car Radio Amp Turn-On Trigger Wire N/A
Car Radio Amp Mute Wire N/A
Car Radio Amplifier Location Right Side of the Trunk
arrow Use an Amp Integration Harness to Connect Your Factory Amplifier to an aftermarket radio.

2004 Kia Optima Speaker Wiring Guide

Knowing your 2004 Kia Optima speaker wire colors makes it super easy to replace your car stereo. Our 2004 Kia Optima speaker wire guide shows you how to connect car speaker wires and helps you when your car speaker wire not working. It also shows you what car speaker wire to use, which car speaker wire is positive and more. Find your 2004 Kia Optima speaker wire below!

Application Bulb Size
Front Center Speaker Positive Wire (+) N/A
Front Center Speaker Negative Wire (-) N/A
arrow Upgrade your Center Speakers for awesome sound!
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
arrow Upgrade your Tweeters for cleaner audio highs!
Left Front Speaker Positive Wire (+) Brown
Left Front Speaker Negative Wire (-) White
Right Front Speaker Positive Wire (+) Orange
Right Front Speaker Negative Wire (-) Green
arrow Use a Speaker Wire Harness for easy Speaker Installation!
Left Rear Tweeter Positive Wire (+) N/A
Left Rear Tweeter Negative Wire (-) N/A
Right Rear Tweeter Positive Wire (+) N/A
Right Rear Tweeter Negative Wire (-) N/A
arrow Upgrade your Tweeters for cleaner audio highs!
Left Rear Speaker Positive Wire (+) Black
Left Rear Speaker Negative Wire (-) Yellow
Right Rear Speaker Positive Wire (+) Blue
Right Rear Speaker Negative Wire (-) Red
arrow Upgrade your Subwoofer for deeper lows!
Subwoofer Positive Wire (+) White
Subwoofer Negative Wire (-) Brown

2004 Kia Optima Speaker Size and Location

Knowing your 2004 Kia Optima speaker sizes makes it simple to install new car speakers. Our 2004 Kia Optima speaker size guide shows you the exact measurements and what speaker fits in your car. It also shows you where your 2004 Kia Optima speakers are located. Find your 2004 Kia Optima speaker size and speaker location below!

Application Bulb Size
Front Center Speaker Size N/A
Front Center Speaker Depth N/A
Front Center Speaker Location N/A
arrow Upgrade your Center Speakers for awesome sound!
Front Tweeter Size 1″ Tweeters
Front Tweeter Depth N/A
Front Tweeter Location Front Doors
arrow Upgrade your Tweeters for cleaner audio highs!
Front Speaker Size 6.5″ Speakers
Front Speaker Depth 4″
Front Speaker Location Front Doors
arrow Use a Speaker Wire Harness for easy Speaker Installation!
Rear Tweeter Size N/A
Rear Tweeter Depth N/A
Rear Tweeter Location N/A
arrow Use a Speaker Wire Harness for easy Speaker Installation!
Rear Speaker Size 6.5″ Speakers
Rear Speaker Depth 6″
Rear Speaker Location Rear Deck
arrow Upgrade your Subwoofer for deeper lows!
Car Subwoofer Speaker Size N/A
Car Subwoofer Speaker Depth N/A
Car Subwoofer Speaker Location N/A

Questions and Answers

Have any questions about your 2004 Kia Optima radio installation? Please feel free to post it at the bottom of this page. We will do our best to find you the answer you are looking for. Or hopefully someone in the Modified Life community will respond with the car stereo information you are looking for.

Contribute

Want to help the Modified Life community by contributing 2004 Kia Optima stereo wire diagram information? Feel free to post it at the bottom of this page. Thank you in advance for your contribution!

Conclusion

Feel free to use any 2004 Kia Optima radio wire diagram that is listed here but keep in mind that all information here is provided as is without any warranty of any kind. Use of this 2004 Kia Optima stereo wiring guide is at your own risk. Always verify all radio wire, stereo wire colors and wiring information before applying it to your 2004 Kia Optima.

8 thoughts on “2004 Kia Optima Radio Wire Harness Guide”

  1. Ashley, 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 make sure all of your fuses are not blown. If all of your fuses are in working condition, your 2004 Kia Optima may have a factory amplifier 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 amp to output sound from your speakers. Double check that your 2004 Kia Optima amplifier turn on wire is connected. Hope this helps. Good luck with your 2004 Kia Optima radio installation.

  2. I have the same problem i have a 2004 kia optima and no sound comes out of my speakers at all I bought a new stereo and tried installing it last night and still no sound could this be an amp also?

  3. i own a 2004 kia optima. i wanna know if the stereo coded because its bring out no sound from speakers and the channels keep fluctuating without following programmed channel settings. someone please help me out. you are guys are doing a great job .i have learned a lot here. thanks.

  4. Will, most late model vehicles do not have RCA outputs on the factory radio to feed an audio signal to your aftermarket amplifier. You would have to install a line out converter to supply an audio output. Here is the Line-Out Converter you need:

    Scosche 2-Channel Speaker to RCA Line Out Converter

    When splicing in the RCA Line Out Converter, tap your factory rear speaker wires to get a full range audio source. We suggest you invest in some solid wire taps that wont come loose. These wire tap connectors will allow you to tap into wires without cutting and installs in seconds by hand with no crimping or tools required. If you install a line out converter, your rear speakers will still work properly. 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 Kia Optima amplifier and subwoofer installation.

  5. We have the same problem and was told to check around with junk yards and car stereo installation shops to see if they could put in an amp. I did not check the junk yards, but have run into the same issues of everyone wanting an outrageous amount to get the amp. Can I use just any amp? Is there a certain size? Brand? The stereo works, as do the front speakers…was told the amp supplies to the rear speakers of which are not working. Thanks!

  6. Greg, it is possible for a factory amplifier to go bad and yes it is expensive to replace because you can only get the amplifier from the dealer. If you don’t want to spend $800 on an amplifier, our advice is to call a couple of experienced car stereo installation shops in your area. Ask them if they can bypass the amp, it may be cheaper to have your car re-wired rather than spend $800 dollars. Hope this helps. Good luck.

  7. My mother-in-law has a 2004 Kia Optima and her factory stereo is not putting out any sound. A mechanic at the local shop said the “power amplifier” went bad and it’s an $800 part. He said the stereo itself is fine, but since the “power amplifier” is bad, the sound from the stereo head unit can’t be heard. Is there such a thing or can I just install an aftermarket stereo and solve the problem?

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