1999 Pontiac Firebird Car Radio Wire Guide

Whether your an expert Pontiac Firebird mobile electronics installer, Pontiac Firebird fanatic, or a novice Pontiac Firebird enthusiast with a 1999 Pontiac Firebird, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1999 Pontiac Firebird 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 1999 Pontiac Firebird.

The Modified Life staff has taken all its Pontiac Firebird car radio wiring diagrams, Pontiac Firebird car audio wiring diagrams, Pontiac Firebird car stereo wiring diagrams, Pontiac Firebird car radio wiring schematics, Pontiac Firebird 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 1999 Pontiac Firebird part or component.

Feel free to use any Pontiac Firebird 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 Pontiac Firebird wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1999 Pontiac Firebird.


If you have any questions pertaining to the audio system in the 1999 Pontiac Firebird, 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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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.

1999 Pontiac Firebird Car Radio Wire Guide

Radio Constant 12V+ Wire: Orange
Radio Switched 12V+ Wire: Yellow
Radio Ground Wire: Black
Radio Illumination Wire: Gray
Radio Dimmer Wire: Brown
Radio Power Antenna Trigger Wire: Pink
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 6 1/2″ Speakers
Front Speakers Location: Doors
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: 6 1/2″ Speakers
Rear Speakers Location: Side Panels
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

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  • Reply Roger May 6, 2010 at 5:59 pm

    I have a 99 firebird completly stock…no monsoon audio. I pulled the stock cd player out and there were 3 of the same colored wires….what do i do to hook them up…kinda confused here…

  • Reply Kevin November 24, 2011 at 6:13 pm

    I have a 1999 pontiac firebird with a stock radio. I bought aftermarket subwoofers for it and i dont know what i need to hook the wires from the subs to the monsoon radio. Can someone help me?

  • Reply ModifiedLife December 6, 2011 at 6:02 pm

    Kevin, you will need some aftermarket electronics to hook up a subwoofer to your 1999 Pontiac Firebird factory stereo. You will need five components:

    1. Car Subwoofer
    2. Car Subwoofer Box to house your car subwoofer.
    3. Car Audio Amplifier that matches your subwoofer power needs and ohm rating.
    4. Car Amplifier Wiring Kit that can handle the power needs of your amplifier.
    5. RCA Line Out Converter to feed an audio signal from your factory radio to your aftermarket amplifier.

    First run all your amplifier power from your car battery to where you plan on mounting your amplifier. Next, run your ground wire from your grounding point to your amplifier. Instead of wiring your RCA Line Out Converter to your factory amplifier, wire it to the rear speaker wires to get a full range audio source. Next, connect one end of your RCA jacks to the Line Out Converter and the other end of the RCA jacks to your amplifier. This will provide an audio signal to your after market amp. Lastly, connect your subwoofer to your after market amplifier using the speaker wire in the amplifier wiring kit. If you’ve never installed car audio before, we advise you to take your car to an experienced mobile audio installer. Hope this helps. Good luck with your 1999 Pontiac Firebird amplifier and subwoofer installation.

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