1998 Toyota Avalon Car Stereo Radio Wiring Diagram

Whether your an expert Toyota Avalon mobile electronics installer, Toyota Avalon fanatic, or a novice Toyota Avalon enthusiast with a 1998 Toyota Avalon, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1998 Toyota Avalon 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 1998 Toyota Avalon.

The Modified Life staff has taken all its Toyota Avalon car radio wiring diagrams, Toyota Avalon car audio wiring diagrams, Toyota Avalon car stereo wiring diagrams, Toyota Avalon car radio wiring schematics, Toyota Avalon 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 1998 Toyota Avalon part or component.

Feel free to use any Toyota Avalon 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 Toyota Avalon wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1998 Toyota Avalon.


If you have any questions pertaining to the audio system in the 1998 Toyota Avalon, 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.

1998 Toyota Avalon Car Stereo Radio Wiring Diagram

Radio Constant 12V+ Wire: White/Gray Dots
Radio Switched 12V+ Wire: Black/Gray Dots
Radio Ground Wire: Brown
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Power Antenna Trigger Wire: Black/Red
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 4″ Speakers
Front Speakers Location: Doors
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Blue
Rear Speakers Size: 5 1/4″ Speakers
Rear Speakers Location: Rear Doors
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White

The 1998 Toyota Avalon radio wire color information above is updated as it is submitted by the Modified Life community.

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  • Reply Josh December 2, 2010 at 11:49 am

    The wiring diagram above does not include the subwoofer in the rear under the window. Also the 1998 Avalons do not have a power antenna and they do have a factory amplifier under the glove box. Other than that the diagram is very good.

  • Reply ModifiedLife December 8, 2010 at 3:37 am

    Josh, the power antenna trigger wire refers to the wire that turns on the amplified antenna system. Thanks for the additional 1998 Toyota Avalon stereo information contribution!

  • Reply Arvin December 9, 2010 at 7:29 pm

    I have a 1998 Toyota Avalon XLS with the 6 or 7 speaker option (front tweeters and rear sub). Does anybody know or have a link on how to wire a new stereo when you DO have the amplifier under the glove box? I’ve been doing some research and some people say to use a certain wiring harness however websites say it does not fit my vehicle. Others say to directly splice and bypass the factory amp… I am very confused and would appreciate some help. I want to buy an Alpine CDE-103BT and also upgrade the factory speakers. Thanks in advance.

  • Reply Josh January 3, 2011 at 12:47 pm

    Arvin, the problem you are probably running into is that wire harnesses made shortly after the Avalon came out were made improperly. Luckily, many manufacturers have fixed the error. Make sure when you purchase a wire harness it is was manufactured recently and make certain you receive the right one.

  • Reply ModifiedLife January 7, 2011 at 8:01 pm

    Josh, thanks for the 1998 Toyota Avalon stereo wiring harness information contribution!

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