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2nd Gen Chassis Codes: RL1 • RL2 | Model Years: 1999, 2000, 2001, 2002, 2003, and 2004
This page provides the complete 1999–2004 Honda Odyssey radio wiring diagram for the 2nd generation Odyssey (chassis codes RL1 and RL2). Use this guide when installing an aftermarket head unit or diagnosing factory stereo issues in a 1999, 2000, 2001, 2002, 2003, or 2004 Honda Odyssey.
The 2nd generation Odyssey was a major redesign that moved the Odyssey to a larger, purpose-built minivan platform and established it as one of the best-selling minivans in North America. The EX-L trim introduced a factory rear entertainment system (DVD player) on some configurations, which added complexity to the overall audio architecture. Higher trims included additional speaker locations to serve the three-row cabin, while base LX trims used a simpler speaker layout.
🔗 In This Guide
1999–2004 Honda Odyssey Stereo Wiring Diagram
Use the wiring table below for your 1999, 2000, 2001, 2002, 2003, and 2004 Honda Odyssey 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+) | White/Red |
| Ground Wire | Black |
 (Simple Radio Install, Keep Steering Wheel Controls and Use Factory Amplifier) |
|
| Illumination Wire | Red/Black |
| Dimmer Wire | Red |
| 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 (–) | Brown/White |
| Rear Right Speaker Positive (+) | Red/Yellow |
| Rear Right Speaker Negative (–) | Brown/White |
| Subwoofer Positive Wire (+) | N/A |
| Subwoofer Negative Wire (–) | N/A |
1999–2004 Honda Odyssey Speaker Sizes and Locations
Use the speaker table below for your 1999, 2000, 2001, 2002, 2003, and 2004 Honda Odyssey speaker sizes and locations.
| Speakers | Speaker Size & Location |
|---|---|
| Front Tweeter Speaker Size | N/A |
| Front Tweeter Speaker Location | N/A |
| Front Speaker Size | 6 1/2″ Speakers |
| Front Speaker Location | Front Doors |
| Rear Tweeter Speaker Size | N/A |
| Rear Tweeter Speaker Location | N/A |
| Rear Speaker Size | 6 1/2″ Speakers |
| Rear Speaker Location | Rear Side Panels |
| Subwoofer Speaker Size | N/A |
| Subwoofer Speaker Location | N/A |
Frequently Asked Questions
Does the 1999–2004 Honda Odyssey EX-L have a factory rear entertainment system?
Yes. The EX-L trim of the 2nd generation Odyssey offered an optional factory DVD rear entertainment system on some configurations. This system includes a ceiling-mounted screen and separate audio channels for the rear passengers. When replacing the front Head Unit in an Odyssey equipped with the rear entertainment system, verify that the front and rear audio systems are properly separated so that a new front head unit does not disrupt the rear entertainment system’s audio output.
What wiring harness adapter fits a 1999–2004 Honda Odyssey?
The 2nd generation Odyssey uses a Honda radio connector compatible with Metra 70-1725 Wire Harness Adapter or Metra 70-1727 Wire Harness Adapter depending on the model year. The connector changed between early and late production years within this range, so verify the specific connector on your vehicle. Scosche HA1583B Wire Harness Adapter is another commonly used adapter that covers this generation. Using a harness adapter rather than cutting the factory connector is strongly recommended.
Where is the factory amplifier in a 1999–2004 Honda Odyssey?
EX-L and Touring trims of the 2nd generation Odyssey with the premium audio package include a factory Amplifier. The amplifier is typically located beneath one of the front seats or behind a side interior trim panel in the rear cabin area. LX and base EX trims without the premium audio package do not include a factory Amplifier and use a passive speaker system driven from the head unit.
What size are the front door speakers in a 1999–2004 Honda Odyssey?
The 2nd generation Odyssey uses 6 1/2″ Speakers in the front door panels on EX and higher trims. LX trims may use dashboard-mounted speakers of a smaller size. Rear cabin speaker sizes vary by trim and configuration. Confirm the speaker cutout dimensions in your specific trim level before ordering aftermarket replacement speakers.
How do I retain the rear entertainment system audio when replacing the front radio in a 1999–2004 Honda Odyssey?
When replacing the front head unit in a 2nd gen Odyssey with the rear DVD entertainment system, use a wiring harness that preserves the rear entertainment audio signal path. The rear system typically receives audio from a separate set of rear speaker channels that run independently of the main front speaker outputs. A qualified installer familiar with Honda minivan Rear Entertainment Systems can help identify which circuits need to be preserved during the front head unit swap.
Add Wiring Information
If you have verified 1999–2004 Honda Odyssey 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 2nd generation Odyssey owners. If you have a question about your 2nd gen Honda Odyssey stereo installation, post it below and our community will work to find an answer.
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