Question: Where can I find a 1990 Toyota Supra stereo wiring diagram, and what are the 1990 Toyota Supra radio wiring harness color codes?
If you’re planning to upgrade the radio in your 1990 Toyota Supra or troubleshoot issues with your car stereo, this guide is here to help!
Our comprehensive 1990 Toyota Supra 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 1990 Toyota Supra.
In This Guide
1990 Toyota Supra Stereo Wiring Diagram
This 1990 Toyota Supra stereo wiring chart shows you all the 1990 Toyota Supra 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.
| Car Stereo Wire Function | Wire Color Code |
|---|---|
| Battery Constant Power Wire (12v+) | Blue/Yellow |
| Accessory Switched Power Wire (12v+) | N/A |
| Ground Wire | Chassis |
Use a Wiring Harness  and Dash Kit  for an Easy Install! |
|
| Illumination Wire | Green |
| Dimmer Wire | N/A |
| Antenna Trigger Wire | N/A |
| Amplifier Turn-On Wire | N/A |
| Amplifier Mute Wire | N/A |
| Amplifier Location | N/A |
1990 Toyota Supra Speaker Wiring Guide
This 1990 Toyota Supra 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 1990 Toyota Supra 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 (+) | Pink |
| Front Left Speaker Negative Wire (-) | Purple |
| Front Right Speaker Positive Wire (+) | Green |
| Front Right Speaker Negative Wire (-) | Blue |
| 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 (+) | Black |
| Rear Left Speaker Negative Wire (-) | Yellow |
| Rear Right Speaker Positive Wire (+) | Red |
| Rear Right Speaker Negative Wire (-) | White |
| Subwoofer Positive Wire (+) | N/A |
| Subwoofer Negative Wire (-) | N/A |
1990 Toyota Supra Speaker Sizes and Locations
This 1990 Toyota Supra speaker guide includes speaker sizes, speaker locations, and helpful info on speaker upgrades. Use this chart to find out what size speakers fit your 1990 Toyota Supra.
| 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 | 4″ Speakers |
| Front Speaker Depth | 2.2″ Depth |
| Front Speaker Location | Front Doors |
| Rear Tweeter Size | N/A |
| Rear Tweeter Depth | N/A |
| Rear Tweeter Location | N/A |
| Rear Speaker Size | 5.25″ Speakers |
| Rear Speaker Depth | 3.5″ Depth |
| Rear Speaker Location | Rear Panels |
| Subwoofer Size | N/A |
| Subwoofer Depth | N/A |
| Subwoofer Location | N/A |
Questions and Answers
If you have any questions about your 1990 Toyota Supra 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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2 thoughts on “1990 Toyota Supra Car Audio Wiring Schematic”
My question pertains to the size of the speakers and finding a system that would fit in a 1990 Toyota Supra… It’s my husband’s car and I wanted to get a new sound system for him.
Martine, here are your 1990 Toyota Supra speaker sizes:
Car Audio Front Speakers Size: 4″ speakers
Car Audio Front Speakers Depth: 2 1/5″
Car Audio Front Speakers Location: N/A
Car Audio Rear Speakers Size: 5 1/4″ speakers
Car Audio Rear Speakers Depth: 3 1/2″
Car Audio Rear Speakers Location: N/A
Hope this helps. Good luck with your 1990 Toyota Supra speaker installation.