1999 Lexus LS400 Car Radio Wiring Diagram

Whether your an expert Lexus LS400 mobile electronics installer, Lexus LS400 fanatic, or a novice Lexus LS400 enthusiast with a 1999 Lexus LS400, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1999 Lexus LS400 vehicles are becoming increasing more difficult to identify due to the installation of more advanced factory oem electronics.

One of the most time consuming tasks with installing an after market car stereo, car radio, satellite radio, xm radio, car speakers, tweeters, car subwoofer, crossovers, audio equalizer, car amplifier, mobile amp, car amplifier, mp3 player, ipod or any car audio electronics is identifying the correct color car audio wires for your 1999 Lexus LS400.

The Modified Life staff has taken all its Lexus LS400 car radio wiring diagrams, Lexus LS400 car audio wiring diagrams, Lexus LS400 car stereo wiring diagrams, Lexus LS400 car radio wiring schematics, Lexus LS400 car wiring diagrams and cataloged them online for use by our visitors for free. Our automotive wiring diagrams allow you to enjoy your new mobile electronics rather than spend countless hours trying to figure out which wires goes to which 1999 Lexus LS400 part or component.

Feel free to use any Lexus LS400 car stereo wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most of the car audio wiring diagrams listed on our enthusiast website are submitted by the Modified Life community. Use of the Lexus LS400 wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1999 Lexus LS400.


If you have any questions pertaining to the audio system in the 1999 Lexus LS400, please feel free to post it at the bottom of this page and either we’ll do our best to find you the information you need or hopefully someone in the Modified Life community will have the information you’re looking for.

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1999 Lexus LS400 Car Radio Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Blue/Yellow
Car Radio Accessory Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4″ Speakers
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Purple
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Blue
Car Audio Rear Speakers Size: 6″
Car Audio Rear Speakers Location: Rear Door
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White


  • Reply David Gash June 22, 2009 at 3:22 pm

    Can you tell me where the amplifier is located in a 1999 Lexus LS400.
    Thank you.

  • Reply LARRY July 21, 2009 at 2:25 pm

    Can the illuminating light in a 1999 Lexus LS400 radio be replaced or does the radio need to be replaced (which works fine)?

  • Reply ModifiedLife July 29, 2009 at 2:10 am

    Larry, most likely the radio would have to be replaced. You may be able to repair it but it’ll probably cost you the same as getting a new one put in. Hope this helps. Good luck with your radio.

  • Reply Dan January 1, 2012 at 3:28 pm

    Can anyone tell me how to get the stereo out of a 1999 Lexus LS400? Preferably without breaking anything. I’ve read posts where they say to pry the AC vent out but this one’s not giving. can anyone help me with a 1999 Lexus LS400 radio removal?

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