Question: Where can I find a 1991 Honda Civic radio wiring diagram? What are the 1991 Honda Civic radio wiring harness color codes?
If you’re planning to upgrade the radio in your 1991 Honda Civic or troubleshoot issues with your car stereo, this guide is here to help!
Our comprehensive 1991 Honda Civic 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 1991 Honda Civic.
In This Guide
1991 Honda Civic Car Stereo Wiring Diagram
This 1991 Honda Civic radio wiring chart shows you all the 1991 Honda Civic 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+) | White/Blue |
| Accessory Switched Power Wire (12v+) | Yellow/Red |
| Ground Wire | Black |
Use a Wiring Harness  and Dash Kit  for an Easy Install! |
|
| Illumination Wire | Red/Black |
| Dimmer Wire | N/A |
| Antenna Trigger Wire | N/A |
| Amplifier Turn-On Wire | N/A |
| Amplifier Mute Wire | N/A |
| Amplifier Location | N/A |
1991 Honda Civic Speaker Wiring Guide
This 1991 Honda Civic 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 1991 Honda Civic 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 (+) | Blue/Green |
| Front Left Speaker Negative Wire (-) | Gray/Black |
| Front Right Speaker Positive Wire (+) | Red/Green |
| Front Right Speaker Negative Wire (-) | Brown/Black |
| 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 (+) | Blue/Yellow |
| Rear Left Speaker Negative Wire (-) | Gray/White |
| Rear Right Speaker Positive Wire (+) | Red/Yellow |
| Rear Right Speaker Negative Wire (-) | Brown/White |
| Left Subwoofer Positive Wire (+) | N/A |
| Left Subwoofer Negative Wire (-) | N/A |
| Right Subwoofer Positive Wire (+) | N/A |
| Right Subwoofer Negative Wire (-) | N/A |
1991 Honda Civic Speaker Sizes and Locations
This 1991 Honda Civic speaker guide includes speaker sizes, speaker locations, and helpful info on speaker upgrades. Use this chart to find out what size speakers fit your 1991 Honda Civic.
| 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 | 6.5″ Speakers |
| Front Speaker Depth (Hatchback, Sedan) | 1.75″ Depth |
| Front Speaker Depth (Wagon) | 2.5″ Depth |
| Front Speaker Location | Front Doors |
| Rear Tweeter Size | N/A |
| Rear Tweeter Depth | N/A |
| Rear Tweeter Location | N/A |
| Rear Speaker Size | 6.5″ Speakers |
| Rear Speaker Depth (Hatchback) | 2.5″ Depth |
| Rear Speaker Depth (Sedan) | 3″ Depth |
| Rear Speaker Location | Rear Deck |
| Subwoofer Size | N/A |
| Subwoofer Depth | N/A |
| Subwoofer Location | N/A |
Questions and Answers
If you have any questions about your 1991 Honda Civic 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!
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3 thoughts on “1991 Honda Civic Stereo Wiring Diagram”
I am having a problem with my car stereo i have to put both yellow and red to the stereo red for power and i hav no memory what can i do??????
Gina, you have to wire the yellow wire to the radio constant wire and wire the red wire to the radio switched ignition wire. The radio constant wire always sends power to the radio to save your radio stations and other audio settings. The switch ignition wire sends power to your radio only when the key is in the ignition and your 1991 Honda Civic is on. Hope this helps. Good luck with your 1991 Honda Civic radio installation.
I put a new aftermarket radio in my ’91 Honda Civic. I bought a wiring harness and connected all the like colors together. Everthing works but the problem is that the sound quality is poor. It’s as though the bass is turned down all the way and the treble is turned up all the way. The original radio sounded much better. I think the speakers are connected properly, since they seem to be in phase, the left to right balance control works properly and the bass and treble controls work. The sound just seems to be biased toward the high frequency end of the spectrum. Its as though it was a bi-amped stereo and only the high frequency amp was connected (but of course it’s not a bi-amped stereo, it’s a cheap Bravo brand) Anybody have any ideas?