Question: Where can I find a 1999 Lexus RX300 stereo wiring diagram, and what are the 1999 Lexus RX300 radio wiring harness color codes?
If you’re planning to upgrade the radio in your 1999 Lexus RX300 or troubleshoot issues with your car stereo, this guide is here to help!
Our comprehensive 1999 Lexus RX300 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 1999 Lexus RX300.
In This Guide
1999 Lexus RX300 Stereo Wiring Diagram
This 1999 Lexus RX300 stereo wiring chart shows you all the 1999 Lexus RX300 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+) | White/Blue |
| Accessory Switched Power Wire (12v+) | Gray/Red |
| Ground Wire | Brown |
Use a Wiring Harness  and Dash Kit  for an Easy Install! |
|
| Car Radio Illumination Wire (+) | Green (13-Pin Plug) |
| Car Stereo Bean-Bus Wire (Without Navigation)
|
Yellow/Black (13-Pin Plug) |
| Car Radio Bean-Bus Wire (With Navigation)
|
Yellow/Black (Pin 12 in Gray 14-Pin Plug) |
| Antenna Trigger Wire | Black (7-Pin Plug) |
| Amplifier Turn-On Wire | N/A |
| Amplifier Mute Wire | N/A |
| Amplifier Location | N/A |
| Parking Brake Wire
|
Violet/White (Pin 5 in White 14-Pin Plug) |
| Vehicle Speed Sense Wire
|
Red/White (Pin 13 in White 14-Pin Plug) |
The Bean BUS wire must be connected properly for an aftermarket 1999 Lexus RX300 Speaker Wiring Guide
This 1999 Lexus RX300 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 1999 Lexus RX300 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 (+) | Light 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 |
1999 Lexus RX300 Speaker Sizes and Locations
This 1999 Lexus RX300 speaker guide includes speaker sizes, speaker locations, and helpful info on speaker upgrades. Use this chart to find out what size speakers fit your 1999 Lexus RX300.
| 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 | 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 | 6.5″ Speakers |
| Rear Speaker Depth | 3″ Depth |
| Rear Speaker Location | Rear Doors |
| Subwoofer Size | N/A |
| Subwoofer Depth | N/A |
| Subwoofer Location | N/A |
How to Calibrate the Touchscreen on 1999 Lexus RX300
If the touchscreen in your 1999 Lexus RX300 is not functioning correctly or not responding properly when you press buttons, your touchscreen may need a re-calibration.
| Step by Step Instructions |
|---|
| 1. Press and hold the upper two soft buttons on either side of the touchscreen for 10 seconds. |
| 2. A screen will pop up asking for you to press the target in the screen. |
|
3. After pressing the target with your finger, the calibration process will be complete, and the screen will disappear. |
Questions and Answers
If you have any questions about your 1999 Lexus RX300 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 1999 Lexus RX300 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!
7 thoughts on “1999 Lexus RX300 Radio Wiring Diagram”
where is the amp located? I have a connection problem the sound used to cut in and out now i have nothing? any suggestions would help!
under back seat there is a plate that covers it
Justin, thanks for the factory amplifier location information contribution!
The AM radio reception is very poor while the FM is fine. I have changed the antenna with no improvement. I like to listen to talk radio and this is very annoying. I have the Nakamichi radio so it is supposed to be the best. Where can i go next to improve the reception? Thanks mark
I want to put some used speakers in my 1999 lexus rx 300 my dad says its a closed system so i cant do it is that true and if not how can i anythin will HELP ^^
My 1999 Lexus RX300 Tape Deck will not come on and will not eject my Sirius Satellite Radio tape cassette adapter. There may be an inline fuse for the tape deck transport which I cannot locate. I would appreciate the appropriate diagrams for troubleshooting this problem.
Ed, double check ALL your fuses using an 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. If all of your fuses are good, your 1999 Lexus RX300 tape deck may be faulty. We suggest you take your car to an experienced audio installer and have them troubleshoot your problem. Hope this helps. Good luck with your 1999 Lexus RX300 cassette deck troubleshooting.