1990 Cadillac Fleetwood Car Stereo Wiring Guide

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

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

Feel free to use any Cadillac Fleetwood 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 Cadillac Fleetwood wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1990 Cadillac Fleetwood.


If you have any questions pertaining to the audio system in the 1990 Cadillac Fleetwood, 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 Cadillac Fleetwood Car Stereo Wiring Guide

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4″ x 6″ Speakers
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6″ x 9″ Speakers
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue


  • Reply hassan hand April 29, 2009 at 7:08 pm

    hey guys, i have a 1990 cadillac fleetwood brougham with the bose system, would u be able to help me locate where the aftermarket wiring harness is supposed to be replaced?

  • Reply ModifiedLife May 6, 2009 at 12:52 am

    Hassan, here is the car stereo wiring harness you need for your 1990 Cadillac Fleetwood Brougham:

    1990 Cadillac Fleetwood Brougham Car Stereo Wiring Harness

    Hope this helps. Good luck.

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