Question: Where can I find a 2004 Toyota Corolla stereo wiring diagram? What are the 2004 Toyota Corolla radio wiring harness colors?
If you’re looking to change the radio in your 2004 Toyota Corolla or troubleshoot why your car radio stopped working, we’re here to help!
Our comprehensive 2004 Toyota Corolla stereo wiring diagram shows you all the stereo wire harness colors, car speaker wiring colors and car speaker sizes. Use our 2004 Toyota Corolla stereo wiring guide to help you with your car radio and installation needs.
In This Guide
2004 Toyota Corolla Stereo Wiring Diagram
This 2004 Toyota Corolla stereo wiring chart shows you all the 2004 Toyota Corolla stereo wire colors and their functions. Utilize this guide to help you with a car radio install or help with a car radio troubleshoot. 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.
| Application | Radio Wire Color |
|---|---|
| Car Radio Battery Wire (Constant Power 12v+) | Blue/Yellow |
| Car Radio Accessory Wire (Switched Power 12v+) | Gray |
| Car Radio Ground Wire | Black |
 Use a Car Radio Wiring Harness and Car Radio Dash Kit for an Easy Install! |
|
| Car Radio Illumination Wire | Green |
| Car Stereo Dimmer Wire | N/A |
| Car Radio Antenna Trigger Wire | N/A |
| Car Radio Amp Turn-On Trigger Wire | N/A |
| Car Radio Amp Mute Wire | N/A |
| Car Radio Amplifier Location | N/A |
| Use an Amp Integration Harness to Connect Your Factory Amplifier to an aftermarket radio. |
|
2004 Toyota Corolla Speaker Wiring Guide
This 2004 Toyota Corolla speaker wiring chart shows you every speaker wire color and the speaker wire location. Use this 2004 Toyota Corolla speaker wiring guide to help you with a speaker replacement or speaker upgrade. 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.
| Application | Speaker Wire Color |
|---|---|
| Front Center Speaker Positive Wire (+) | N/A |
| Front Center Speaker Negative Wire (-) | N/A |
| Upgrade your Center Speakers for awesome sound! |
|
| Front Left Tweeter Positive Wire (+) | N/A |
| Front Left Tweeter Negative Wire (-) | N/A |
| Front Right Tweeter Positive Wire (+) | N/A |
| Front Right Tweeter Negative Wire (-) | N/A |
| Upgrade your Tweeters for cleaner audio highs! |
|
| Front Left Speaker Positive Wire (+) | Pink |
| Front Left Speaker Negative Wire (-) | Purple |
| Front Right Speaker Positive Wire (+) | Green |
| Front Right Speaker Negative Wire (-) | Blue |
| Use a Speaker Wire Harness for easy Speaker Installation! |
|
| Rear Left Tweeter Positive Wire (+) | N/A |
| Rear Left Tweeter Negative Wire (-) | N/A |
| Rear Right Tweeter Positive Wire (+) | N/A |
| Rear Right Tweeter Negative Wire (-) | N/A |
| Upgrade your Tweeters for cleaner audio highs! |
|
| Rear Left Speaker Positive Wire (+) | Black |
| Rear Left Speaker Negative Wire (-) | Yellow |
| Rear Right Speaker Positive Wire (+) | Red |
| Rear Right Speaker Negative Wire (-) | White |
| Upgrade your Subwoofer for deeper lows! |
|
| Subwoofer Positive Wire (+) | N/A |
| Subwoofer Negative Wire (-) | N/A |
2004 Toyota Corolla Speaker Sizes and Location
This 2004 Toyota Corolla speaker size chart shows your speaker measurements and speaker locations. Use this chart to see what speaker fits in your 2004 Toyota Corolla.
| Application | Speaker Size and Location |
|---|---|
| Front Center Speaker Size | N/A |
| Front Center Speaker Depth | N/A |
| Front Center Speaker Location | N/A |
| Upgrade your Center Speakers for awesome sound! |
|
| Front Tweeter Size | N/A |
| Front Tweeter Depth | N/A |
| Front Tweeter Location | N/A |
| Upgrade your Tweeters for cleaner audio highs! |
|
| Front Speaker Size | 6.5″ Speakers |
| Front Speaker Depth | 3″ Depth |
| Front Speaker Location | Front Doors |
| Use a Speaker Wire Harness for easy Speaker Installation! |
|
| Rear Tweeter Size | N/A |
| Rear Tweeter Depth | N/A |
| Rear Tweeter Location | N/A |
| Use a Speaker Wire Harness for easy Speaker Installation! |
|
| Rear Speaker Size | 6″ x 9″ Speakers |
| Rear Speaker Depth | 4″ Depth |
| Rear Speaker Location | Rear Deck |
| 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
If you have any questions about your 2004 Toyota Corolla 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
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12 thoughts on “2004 Toyota Corolla Car Audio Wiring Diagram”
I have a Toyota Corolla 2004 model which has a remote Toyota 6-CD Changer (Type: 74833 Model 06601-00911) situated under the front passenger seat. I want to remove the 6-CD Changer and feed the signal from my iPod (either iPod connector or headphones jack output) so that I can play it through the car speakers. The cable coming from the Car Radio terminates in a 12 pin female socket. Does anyone have the pin-out specification form the CD Changer to enable me to find the right terminals to connect to? Many thanks!!
Devman, if your car amplifier has speaker or preamp-level inputs then yes, you can use the rear speaker wires to provide an audio signal to your amp. Hope this helps. Good luck with your 2004 Toyota Corolla sub and amp installation.
I am installing a sub an amp into my girlfriends 2004 Corolla. It has the stock AM/FM tuner with a CD player. The stock head unit doesn’t have RCA cables on it so I was wondering if I will still get good sound out of the sub if I tap into the rear speaker wires to run to the amp? I really don’t want to buy a new head unit just for the RCA’s but I still want to get good sound out of the sub.
BobCov, yes having different ohm rated speakers would be problem. You would need to match up your aftermarket head unit ohm rating with the same ohm rating for your speakers. Audio will not play properly if you do not match them up. Our advice is to change your speakers to 6-ohm speakers to work with your 6-ohm aftermarket head unit. As for the edge of the speakers being flush against the mounting surface, it is recommended that you have zero gaps to achieve the best bass output. Hope this helps. Good luck with your 2004 Toyota Corolla speaker installation.
Arggh! Never send an amateur to do a professional’s job. I changed the rear speakers in my 2004 LE to some Kenwood 6×9 (KFC-m6940ie) thinking they would have to sound better. They did not fit, so I had to build some brackets to hold them in place. They sound worse than the factory OEM. I tried reversing the polarity on the Kenwoods in case i had that wrong. Still sounds bad. The radio is a Pioneer DEH-2200UB. The old speakers were 6 ohm and the new ones are 4 ohm. Is this a bad combination? Is it important to have zero gaps between the edge of the speakers and the back window dash? I really thought these would improve the sound. I’m very surprised and open to suggestion.
I have a 2004 Corolla S with a factory AM/FM radio with a CD & cassette tape player. I would like to know if that particular radio has the red & white RCA jacks in the rear so I can hook up my mp3 player with a patch cord. If not, what do you recommend for the best sound performance. The latest issue of Popular Mechanics, March, 2009, addresses the different ways to hook-up your radio to an mp3 player.
Roger Nin, technically you could connect your amplifier turn on wire to the radio switched 12v+ wire. That way your amplifier is on whenever the car is on and off whenever your car 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.
which wire on the factory head unit of a 04 toyota corolla do i connect my remote wire to and from my amp?
Roger, the front speakers are tied into the tweeters. Sending an audio signal to your front speakers will power the front tweeters. Hope this helps. Good luck.
I have a 2004 Toyota Corolla. I found the wiring diagram for it here, but it doesn´t talk about de tweeters. This car come with tweeters on front doors sail part. What about the wiring of the tweeters????
Allen, there should be two black wires. The black wire for the left rear speaker positive wire should be located next to the left rear speaker negative wire. Hope this helps.
Car Stereo Antenna Trigger Wire: Black
Left Rear Speaker Positive Wire (+): Black
Hello, I tried to hook up my system in my corolla 2004, but I can not get a signal to the subs. I have power to the amp but no sub sound. I brought a low lever inverter for the rca jacks and hooked up the speaker using the diagram. I only saw 1 black wire which was the speaker wire. Now, is that the antenna wire too. Please let me know Thanks.