Question: Where can I find a 2004 Ford Focus radio wiring diagram? What are the 2004 Ford Focus radio wiring harness color codes?
If you’re planning to upgrade the radio in your 2004 Ford Focus or troubleshoot issues with your car stereo, this guide is here to help!
Our comprehensive 2004 Ford Focus radio wiring diagram shows all the radio wire harness colors, speaker wire colors, and speaker sizes. Use this head unit pinout guide to help with your car stereo installation or to troubleshoot radio wiring issues in your 2004 Ford Focus.
In This Guide
2004 Ford Focus Car Stereo Wiring Diagram
This 2004 Ford Focus radio wiring chart shows you all the 2004 Ford Focus stereo wire color codes and their radio wire functions. This easy-to-follow guide can help you install a new car stereo or figure out problems with your stereo wiring harness and radio setup. 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.
| Car Stereo Wire Function | Wire Color Code |
|---|---|
| Battery Constant Power Wire (12v+) | Yellow/Green |
| Accessory Switched Power Wire (12v+) | Orange/Black |
| Ground Wire | Black/Green |
Use a Wiring Harness  and Dash Kit  for an Easy Install! |
|
| Illumination Wire | N/A |
| Dimmer Wire | Orange/Black |
| Antenna Trigger Wire | N/A |
| Amplifier Turn-On Wire | N/A |
| Amplifier Mute Wire | N/A |
| Amplifier Location | N/A |
2004 Ford Focus Speaker Wiring Guide
This 2004 Ford Focus speaker wiring guide provides all the speaker wire colors and speaker locations you need for an upgrade or replacement. Whether you are installing new speakers or troubleshooting your factory setup, this 2004 Ford Focus chart makes it easy to identify each wire and where it connects. If you don’t see the car speaker wiring info you need, feel free to ask your question at the bottom of the page — we are here to help!
| Car Stereo Wire Function | Wire Color Code |
|---|---|
| Dash Center Speaker Positive Wire (+) | N/A |
| Dash Center Speaker Negative Wire (-) | N/A |
| 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 |
| Front Left Speaker Positive Wire (+) | White/Black |
| Front Left Speaker Negative Wire (-) | Gray/Black |
| Front Right Speaker Positive Wire (+) | White/Red |
| Front Right Speaker Negative Wire (-) | Gray/Red |
| 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 |
| Rear Left Speaker Positive Wire (+) | White/Purple |
| Rear Left Speaker Negative Wire (-) | Gray/White |
| Rear Right Speaker Positive Wire (+) | White |
| Rear Right Speaker Negative Wire (-) | Gray |
| Left Subwoofer Positive Wire (+) | N/A |
| Left Subwoofer Negative Wire (-) | N/A |
| Right Subwoofer Positive Wire (+) | N/A |
| Right Subwoofer Negative Wire (-) | N/A |
2004 Ford Focus Speaker Sizes and Locations
This 2004 Ford Focus speaker guide includes speaker sizes, speaker locations, and helpful info on speaker upgrades. Use this chart to find out what size speakers fit your 2004 Ford Focus.
| Application | Speaker Size/Location |
|---|---|
| Dash Center Speaker Size | N/A |
| Dash Center Speaker Depth | N/A |
| Dash Center Speaker Location | N/A |
| Front Tweeter Size | N/A |
| Front Tweeter Depth | N/A |
| Front Tweeter Location | N/A |
| Front Speaker Size | 6″ x 8″ Speakers |
| Front Speaker Depth | 3″ Depth |
| Front Speaker Location | Front Doors |
| Rear Tweeter Size | N/A |
| Rear Tweeter Depth | N/A |
| Rear Tweeter Location | N/A |
| Rear Speaker Size | 6″ x 8″ Speakers |
| Rear Speaker Depth | 3″ Depth |
| Rear Speaker Location | N/A |
| Subwoofer Size | N/A |
| Subwoofer Depth | N/A |
| Subwoofer Location | N/A |
Questions and Answers
If you have any questions about your 2004 Ford Focus 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
Do you want to contribute 2004 Ford Focus stereo wire diagram information to benefit the Modified Life community? Feel free to share your insights by posting at the bottom of this page. We will gather any additional information presented below by our community, verify it, and incorporate it into the car radio wiring guide above for easy reference. We are consistently adding new information to improve and update this car stereo wiring guide as it becomes available. We appreciate your contribution in advance!
31 thoughts on “2004 Ford Focus Car Audio Wiring Guide”
you know, I always found it hard to find this information online and I almost never leave feedback for anything. All I want to say is thank you for posting this, you save me a lot of time on an install.
Thank you.
J. Mori, we’re glad we could help you with your car radio wiring diagram needs.
Is there a auxiliary plug in, for ipods or of that nature on the back of the cd radio? And yes it is stock 2004 ford focus.
Daniel, unfortunately we don’t have the specific information youre looking for but maybe someone from the Modified Life community can post that information here. Good luck.
These Wiring diagrams were very helpful, however, I did run into a snag. The Stock wires in the car seemed to be a mix between the 2003 and 2004 diagrams. I finally got the setup working using the following configuration…
Car Radio Battery Constant 12v+ Wire: Orange/Black (thick)
Car Radio Accessory Switched 12v+ Wire: Yellow/Green
Car Radio Ground Wire: Black/Green and White/Green
Car Radio Illumination Wire: Orange/Black (thin)
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): White/Black
Left Front Speaker Negative Wire (-): Gray/Black
Right Front Speaker Positive Wire (+): White/Red
Right Front Speaker Negative Wire (-): Gray/Red
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): White/Purple
Left Rear Speaker Negative Wire (-): Gray/White
Right Rear Speaker Positive Wire (+): White
Right Rear Speaker Negative Wire (-): Gray
Dwight, thanks for the car stereo wiring information contribution!
yeah this rocked i thought i was gonna have to download a bunch of junk. but i found this site on google. saved me lots ‘o time.
Dirty, we are glad we could help you with your car stereo wiring diagram needs.
THANKYOUTHANKYOU!!! The second entry worked great on my 2004 Focus station wagon. I love this car and in my carelessness, fried the OEM mp3 cd radio it had in it. I bought an aftermarket radio and thought it would be a snap to install – NOT SO! Well I can tell you – it worked wonderfully with THE ABOVE wiring information! Thank you again. Works great!
Nini, we are glad we could help you with your 2004 Ford Focus car audio wiring diagram needs.
i have a problem with the wiring? i know where everything goes except there is no current on my 12 v wire…does it have a fuse somewhere?
Tedd, all cars have a fuse for the radio. Check ALL your fuses because certain vehicles may have 2 fuses for the stereo. The fuse box is usually located by the driver kick panel, under the steering column or under the hood. Hope this helps. Good luck.
Hi There, Does anybody know what wire is for the steering wheel control that i have on the 2004 ford focus. I have installed an aftermarket headunit and got it working however i would like to keep the steering wheel control working too. Cheers, James
James, it is possible to keep your steering wheel controls while using an aftermarket stereo. You will need a steering wheel control adapter to keep your factory steering wheel controls:
Steering Wheel Control Adapter for Alpine Radio
Steering Wheel Control Adapter for Blaupunkt Radio
Steering Wheel Control Adapter for Clarion Radio
Steering Wheel Control Adapter for Eclipse Radio
Steering Wheel Control Adapter for JVC Radio
Steering Wheel Control Adapter for Kenwood Radio
Steering Wheel Control Adapter for Pioneer Radio
Steering Wheel Control Adapter for Sony Radio
Steering Wheel Control Adapter for Valor Radio
If you have 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 Ford Focus steering wheel adapter installation.
Hi i recently bought a ner aftermarket deck for my 2004 ford focus everything else is perfect but when it comes to the anntena wire the plug dosent fit the hole in the new deck how should I go about this??????
Joe, you need an antenna plug adapter for your after market radio:
2004 Ford Focus Antenna Plug Adapter
Hope this helps. Good luck with your 2004 Ford Focus stereo installation.
Does anyone know where the CAR SPEED SIGNAL wire is? I have a Pioneer Avic-N5 and I need to splice into the car speed wire to get gps to work. Thank you for any help!
Ajo, run a wire to the ABS hydraulic unit on the driver side of the firewall under the hood and use the yellow/red wire for your car speed sense connection. Hope this helps. Good luck with your 2004 Ford Focus navigation installation.
Found an easier way. The factory wire harness has a GREEN/WHITE wire that I spliced into for speed sense. I think I have that wire in my car because I have cruise control.
Ajo, thanks for the 2004 Ford Focus speed sense wire information contribution!
Hey, little problem, might even be fixed before i get a reply, but my amp has a remote wire hook up and i cannot find the correct wire to splice it on to. I’v tried the Orange/Black hook up and attatched it the the blue remote wire that comes out of the aftermarket deck (then spliced the amp remote to those two) but that didnt work. without the remote start it doesnt power on. Anyone help?
Tom, technically you could connect your 2004 Ford Focus amplifier turn on wire to the ignition switched 12v+ wire (brown wire in the ignition switch harness at the steering column). That way your amplifier is on whenever your 2004 Ford Focus is on and off whenever your 2004 Ford Focus 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 with your 2004 Ford Focus amplifier install.
I can’t get my radio stations to save. I swapped the 12v black and orange thick and the black and yellow but then my radio stays on with the car off. Please help! I hate putting in my stations manually everytime I drive.
Gina, 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 Ford Focus 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 Ford Focus radio installation.
I had an aftermarket deck installed in my focus. Now my sub wont work, any ideas?
M, 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 2004 Ford Focus 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 subwoofer. We currently do not have any information on the 2004 Ford Focus amplifier turn-on wire but hopefully someone from our knowledgeable Modified Life community would be able to chime in and help you out.
I already tried that. Like I said in my first post, if I swap the 12v hook ups, the stereo never turns off. Even if I turn the car off, remove the keys and open the door, it stays on. anyone?
A 2004 ford focus, we changed the battery and followed the book for the engine and transmission to relearn the computer codes but the radio and clock are dead I checked the radio fuse it’s ok. what next??? Thanks in advance for any help, Joe M.
Joe, double check ALL your fuses using a Automotive Fuse Tester because certain vehicles may have a wire tied into another circuit not labeled as car radio. You may have additional fuse boxes by the driver side of the dash, passenger side of the dash, driver kick panel, passenger kick panel, under the steering column or under the hood. Hope this helps. Good luck with your 2004 Ford Focus radio troubleshooting.
do I connect blue power control wire from amp to the accessory switched 12v wire for on\off?
Chris, technically you could connect your 2004 Ford Focus amplifier turn on wire to the accessory switched 12v+ wire. That way your amplifier is on whenever your 2004 Ford Focus is on and off whenever your 2004 Ford Focus 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 with your 2004 Ford Focus amplifier installation.