1989 Mercury Grand Marquis Car Radio Wire Diagram

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

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

Feel free to use any Mercury Grand Marquis 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 Mercury Grand Marquis wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1989 Mercury Grand Marquis.

Questions

If you have any questions pertaining to the audio system in the 1989 Mercury Grand Marquis, 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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1989 Mercury Grand Marquis Car Radio Wire Diagram

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

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4 Comments

  • Reply frank torres September 16, 2009 at 2:01 pm

    which wire is used for the memmory on this car

  • Reply ModifiedLife September 29, 2009 at 4:05 pm

    Frank, the 1989 Mercury Grand Marquis radio memory wire is green/yellow. Hope this helps. Good luck with your radio installation.

  • Reply Gary Mors November 15, 2009 at 4:09 pm

    The front doors seem to be pre-wired for speakers:

    Left front: blue/white, pink/white
    Right front: pink/orange, green/orange

    Also do any wires change color codes at chassis connectors/wiring harness connectors?

  • Reply Justin April 28, 2010 at 8:28 pm

    On the radio wiring for my 89 Merc Gr Marquis, are the rear spkrs grounded together? I have a premium sound system installed from factory and I can’t find out why I have the small square plug and the older flat plug for the spkrs in the dash. I have both harness adapters, but wonder why they have both plugs wired behind the dash. Thanks for the info.

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