1990 Lexus LS400 Factory Audio Wiring Information

Whether your an expert Lexus LS400 mobile electronics installer, Lexus LS400 fanatic, or a novice Lexus LS400 enthusiast with a 1990 Lexus LS400, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1990 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 1990 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 1990 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 1990 Lexus LS400.

Questions

If you have any questions pertaining to the audio system in the 1990 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.

Request a Car Stereo Wiring Diagram

If you can’t find a particular car audio wire diagram on Modified Life, please feel free to post a car radio wiring diagram request at the bottom of this page and we’ll do our best to find you the diagram or schematic you need for your mobile audio installation.

Adding More Information

If you would like to help the Modified Life community by adding any missing information or adding a new car audio wire diagram to our resource, please feel free to post it at the bottom of this page.

1990 Lexus LS400 Factory Audio Wiring Information

Car Radio Battery Constant 12v+ Wire: Red
Car Radio Accessory Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: N/A
Car Stereo Power Antenna Trigger Wire: Black/Red
Car Stereo Amp Turn-On Trigger Wire: Pink/Blue
Car Stereo Amplifier Location: Right Side of the Trunk

Car Audio Front Tweeter Size: 1″ Tweeters
Car Audio Front Tweeter Depth: 1″
Car Audio Front Tweeter Location: N/A

Left Front Speaker Positive Wire (+): Green
Left Front Speaker Negative Wire (-): N/A
Right Front Speaker Positive Wire (+): Red
Right Front Speaker Negative Wire (-): N/A

Car Audio Front Speakers Size: 5 1/4″ Speakers
Car Audio Front Speakers Depth: 3″
Car Audio Front Speakers Location: N/A

Left Rear Speaker Positive Wire (+): White
Left Rear Speaker Negative Wire (-): N/A
Right Rear Speaker Positive Wire (+): Yellow
Right Rear Speaker Negative Wire (-): N/A

Car Audio Rear Tweeter Size: 1″ Tweeters
Car Audio Rear Tweeter Depth: 1″
Car Audio Rear Tweeter Location: N/A

Car Audio Rear Speakers Size: 6 1/2″ Speakers
Car Audio Rear Speakers Depth: 3″
Car Audio Rear Speakers Location: N/A

Car Subwoofer Speaker Positive Wire (+): N/A
Car Subwoofer Speaker Negative Wire (-): N/A

Car Subwoofer Speaker Size: 8″ Subwoofer
Car Subwoofer Speaker Depth: 4″
Car Subwoofer Speaker Location: N/A

The 1990 Lexus LS400 radio wire color information above is updated as it is submitted by the Modified Life community.

2 Comments

  • Reply april January 13, 2012 at 7:27 pm

    I have a 1990 lexus ls400 with a Nakamichi premium sound system. Stereo works however the sound is VERY low. The temp.gauge for air/ clock is also out. I’m not sure where the amp is. Located and so I not sure where to even start looking.. Any help would be appreciated.

  • Reply T.e. Grey February 13, 2013 at 7:58 pm

    All questions pertain to 1990 Lexus LS400 v8 4.0 Sedan – (Sorry for all the questions but it’s been extremely tough to find correct answers for them.)

    1. Is there any aftermarket 8″ subwoofer that will fit directly into the rear center enclosure 1990 Lexus LS400 without any cutting or any modifications to the enclosure?
    2. What is the smallest speaker that will fit directly into the 8″ rear center subwoofer enclosure?
    3. The OEM pioneer tape player doesn’t work but the radio does & I want to avoid aftermarket receivers. Is it smart to replace it with another OEM pioneer or is it smarter to go aftermarket?
    Would it be ok if I installed an aux input adapter kit onto my oem receiver?
    4. My receiver is Pioneer w/o any cd controls w/o leather so does the OEM replacement need to match these specifications?
    5. Are there any Toyota or other model Lexus am/fm receivers that fit directly into my model? (excluding Nakamichi brand)

    can anyone help?

  • Leave a Reply

    8 + 6 =