1989 Cadillac Fleetwood Car Radio Wiring Guide

Whether your an expert Cadillac Fleetwood mobile electronics installer, Cadillac Fleetwood fanatic, or a novice Cadillac Fleetwood enthusiast with a 1989 Cadillac Fleetwood, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1989 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 1989 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 1989 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 1989 Cadillac Fleetwood.


If you have any questions pertaining to the audio system in the 1989 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.

1989 Cadillac Fleetwood Car Radio 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 Benz May 10, 2009 at 9:55 pm

    I let a friend install new speakers in my 89 Caddy, and he took out the amplifier chip thingers…I tried to put them back in along with the original Bose speakers, because the aftermarket speakers sucked, but when I hooked them back up they wouldn’t work. The speakers work fine, but without the amps they’re super quiet. I hooked all of the corresponding colored wires up correctly, but I’m thinking either I did something wrong or the amps were messed up? If someone could explain a little bit, or give me tips on where to find new ones that would be great. =]

  • Reply Lucas J. McDonald June 17, 2010 at 12:12 am

    I’m looking for a stock am/fm radio for my 1989 Cadillac Fleetwood.

  • Reply ModifiedLife June 21, 2010 at 3:51 pm

    Benz, you will probably have to source the 1989 Cadillac Fleetwood stereo from your local Cadillac dealer or from a local junk yard. Most retailers do not sell factory radios. Hope this helps. Good luck with your 1989 Cadillac Fleetwood stereo replacement.

  • Reply Brad January 18, 2012 at 8:04 pm

    I bought new 6×9’s for my 1989 Cadillac Fleetwood rear deck but I can’t take my old speakers out. I unplugged them because they blew a while ago and now I’m trying to replace them. Can anyone help me out?

  • Reply ModifiedLife January 26, 2012 at 12:47 am

    Brad, you can get to the rear speakers on most late model cars one of two ways. You can remove the rear speaker grills from some vehicles simply by removing screws that hold down the speaker grills to the rear deck lid. These screws are usually located on the bottom side of the rear deck (accessible through the trunk). The second way would require you to remove the deck lid from the interior of the car. On some cars, removal of the rear seats is required to get to the rear deck lid. Hope this helps. Good luck with your 1989 Cadillac Fleetwood rear speaker wiring.

  • Reply brian lang March 10, 2012 at 3:00 pm

    Anyone know what is the gray/white stripe wire and the orange/black stripe wire is on a 1989 Cadillac Fleetwood radio wire harness?

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