1991 Cadillac Deville Sedan Car Radio Wiring Diagram

Whether your an expert Cadillac Deville Sedan mobile electronics installer, Cadillac Deville Sedan fanatic, or a novice Cadillac Deville Sedan enthusiast with a 1991 Cadillac Deville Sedan, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1991 Cadillac Deville Sedan 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 1991 Cadillac Deville Sedan.

The Modified Life staff has taken all its Cadillac Deville Sedan car radio wiring diagrams, Cadillac Deville Sedan car audio wiring diagrams, Cadillac Deville Sedan car stereo wiring diagrams, Cadillac Deville Sedan car radio wiring schematics, Cadillac Deville Sedan 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 1991 Cadillac Deville Sedan part or component.

Feel free to use any Cadillac Deville Sedan 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 Deville Sedan wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1991 Cadillac Deville Sedan.


If you have any questions pertaining to the audio system in the 1991 Cadillac Deville Sedan, 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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1991 Cadillac Deville Sedan Car Radio Wiring Diagram

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 aclaytor February 5, 2009 at 11:56 am

    1991 deVille radio wiring …trouble shooting clock works but radio does not any suggestions and tape cassette does’nt eithr like no power to it andy

  • Reply ModifiedLife February 10, 2009 at 12:19 am

    Aclaytor, double check all your fuses in your fuse box. It sounds like you blew a fuse. Hope this helps. Good luck.

  • Reply Ross April 20, 2009 at 7:59 am

    my radio and clock both work but once i shut the car off and turn it back on my radio goes back to a.m and the clock resets itself to the wrong time. ive checked fuses but dont know what to be looking for. can anyone help.

  • Reply ModifiedLife April 27, 2009 at 11:41 pm

    Ross, you may have mixed up the battery constant and accessory switched wires. The battery constant always sends power to the radio to save your radio stations and other audio settings. The accessory switched wire sends power to your radio only when the key is in the ignition and your car is on. Check your wiring and make sure the correct radio wires are hooked up to the correct wires on your factory harness. Hope this helps. Good luck.

  • Reply Chad November 2, 2009 at 10:07 pm

    I just bought a 91 Cadillac deville. It has been storage for 3 years before I bought it. The speakers have this buzz and only on the right side of the car. Even when you turn the radio all the way down you can still heard the buzz in the speakers on the right side. Just wondering if the radio is the problem or the right side speakers in the car?

  • Reply Howard July 8, 2010 at 8:30 pm

    How do you remove the radio from a 1991 cadillac sedan deville?

  • Reply Jason November 9, 2010 at 2:47 pm

    Since i got my 91′ Cadillac deville, my radio hasn’t worked, the only thing that works is the clock and i’ve checked all the fuses multiple times, any ideas?

  • Reply Roger Colvin August 21, 2011 at 4:54 pm

    Where can I buy an original factory radio for a 1991 Cadillac Deville radio? I prefer new even if its from a Dealer but guaranteed used will work if necessary.

  • Reply ModifiedLife August 30, 2011 at 12:47 am

    Roger, you will have to source a 1991 Cadillac Deville factory stereo either at your local Cadillac dealer or at your local junkyard. Hope this helps. Good luck with your 1991 Cadillac Deville stock radio search.

  • Reply Scott Lipsett October 14, 2011 at 10:31 pm

    Thank you for your diagram for a 1911 Cadillac Sedan De Ville. I have one question, I have speakers in the door and in the dash are they on the same wire? Anyone? Scott Lipsett

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