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3rd Gen Chassis Codes: AL • AM • AJ • AK | Model Years: 1984, 1985, 1986, and 1987
This page provides the complete 1984–1987 Honda Civic radio wiring diagram for the 3rd generation Civic (chassis codes AL, AM, AJ, and AK). Use this guide when installing an aftermarket head unit or troubleshooting your factory stereo in a 1984, 1985, 1986, or 1987 Honda Civic.
The 3rd generation Civic introduced a more aerodynamic body and marked Honda’s transition to front-wheel drive across the entire Civic lineup. This generation also introduced the high-performance CRX variant. The factory audio used a standardized Honda connector, and door speaker locations first appeared on higher trims during this generation.
🔗 In This Guide
1984–1987 Honda Civic Stereo Wiring Diagram
Use the wiring table below for your 1984, 1985, 1986, and 1987 Honda Civic stereo wire color codes, speaker wiring, and harness pinout.
| Wire Function | Wire Color & Location |
|---|---|
| Battery Constant Power Wire (12V+) | White/Blue |
| Accessory Switched Power Wire (12V+) | Yellow/Red |
| Ground Wire | Black |
| Illumination Wire | Red/Black |
| Dimmer Wire | N/A |
| Antenna Trigger Wire | N/A |
| Amplifier Trigger Wire | N/A |
| Factory Amplifier Location | N/A |
| Rear View Camera Video Positive (+) | N/A |
| Rear View Camera Video Negative (–) | N/A |
| Dash Center Speaker Positive Wire (+) | N/A |
| Dash Center Speaker Negative Wire (–) | N/A |
| Front Left Tweeter Positive (+) | N/A |
| Front Left Tweeter Negative (–) | N/A |
| Front Right Tweeter Positive (+) | N/A |
| Front Right Tweeter Negative (–) | N/A |
| Front Left Speaker Positive (+) | Blue/Green |
| Front Left Speaker Negative (–) | Gray/Black |
| Front Right Speaker Positive (+) | Red/Green |
| Front Right Speaker Negative (–) | Brown/Black |
| Rear Left Tweeter Positive (+) | N/A |
| Rear Left Tweeter Negative (–) | N/A |
| Rear Right Tweeter Positive (+) | N/A |
| Rear Right Tweeter Negative (–) | N/A |
| Rear Left Speaker Positive (+) | Blue/Yellow |
| Rear Left Speaker Negative (–) | Gray/White |
| Rear Right Speaker Positive (+) | Red/Yellow |
| Rear Right Speaker Negative (–) | Brown/White |
| Subwoofer Positive Wire (+) | N/A |
| Subwoofer Negative Wire (–) | N/A |
1984–1987 Honda Civic Speaker Sizes and Locations
Use the speaker table below for your 1984, 1985, 1986, and 1987 Honda Civic speaker sizes and locations.
| Speakers | Speaker Size & Location |
|---|---|
| Front Tweeter Speaker Size | N/A |
| Front Tweeter Speaker Location | N/A |
| Front Speaker Size | 5 1/4″ Speakers |
| Front Speaker Location | Front Doors |
| Rear Tweeter Speaker Size | N/A |
| Rear Tweeter Speaker Location | N/A |
| Rear Speaker Size | N/A |
| Rear Speaker Location | N/A |
| Subwoofer Speaker Size | N/A |
| Subwoofer Speaker Location | N/A |
Frequently Asked Questions
What wiring harness adapter fits a 1984–1987 Honda Civic?
The 3rd generation Civic uses a Honda radio connector that is more standardized than earlier generations. Metra 70-1721 Wire Harness Adapter and Scosche HA08B Wire Harness Adapter are among the available adapters, though fitment varies by specific model year within this range. Verify the exact connector on your vehicle before ordering, as 1984–1985 models may differ from 1986–1987 models in connector type.
Did the 1984–1987 Honda Civic CRX have a different audio system?
The CRX Si shared its platform with the 3rd generation Civic but had a notably tighter interior. The CRX HF (high fuel efficiency) trim was frequently sold as a radio-delete model to save weight. If installing an Aftermarket Radio in a CRX HF, audio wiring may be completely absent and you will need to run all circuits from scratch.
What size are the factory speakers in a 1984–1987 Honda Civic?
The 3rd generation Civic moved speaker locations to the doors on higher trims, using a 5 1/4″ Speakers in the front doors on Si and DX trims. Dashboard speakers on lower trims were typically 3 1/2″ Speakers. Rear speaker locations (where present) used a 6″ x 9″ opening on some sedan configurations.
Does the 1984–1987 Honda Civic have steering wheel audio controls?
No. Steering wheel audio controls were not available on any 3rd generation Civic trim. No SWC retention interface is needed when replacing the radio in a 1984–1987 Civic. The steering wheel’s only control is the horn.
Why does my 1984–1987 Honda Civic have engine noise in the radio?
Alternator whine (a high-pitched noise that increases with engine RPM) in 3rd gen Civic audio systems is typically caused by a poor ground connection on the head unit or the head unit sharing a ground circuit with other electrical accessories. Run a dedicated ground wire from the head unit chassis directly to a clean, paint-free chassis bolt. Installing a Ground Loop Isolator on the speaker outputs is a secondary fix if the dedicated ground does not resolve the issue.
Add Wiring Information
If you have verified 1984–1987 Honda Civic radio wiring data — wire colors, pin locations, harness adapter tips, or speaker sizes — please share it in the comments below. Community-submitted data is reviewed and added to the table above to help other 3rd generation Civic owners. If you have a question about your 3rd gen Honda Civic stereo installation, post it below and our community will work to find an answer.