1999 Pontiac Grand Am Car Stereo Wiring Diagram

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

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

Feel free to use any Pontiac Grand Am 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 Grand Am 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 Grand Am.

Questions

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

1999 Pontiac Grand Am Car Stereo 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: Doors
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

Make Your Pontiac Grand Am Car Stereo Installation Easy with these Products

14 Comments

  • Reply Akron Wright May 23, 2009 at 9:07 pm

    I am having a problem installing my radio. The problem is that when I set my pre-sets and then I turn off my car, and when I turn on my car again my pre-sets are gone. Please help me with this problem I thank you in advance..

  • Reply ModifiedLife June 2, 2009 at 12:26 am

    Akron, 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 Connor June 4, 2009 at 8:51 pm

    I would like to be able to connect my iPod to the stereo system via the 3.5mm headphone jack on my iPod. How could I attach the wires from the headphone cord to the input in the stereo console?

  • Reply ModifiedLife June 16, 2009 at 4:38 pm

    Connor, there are aftermarket ipod adapters available for most late model cars. Unfortunately, as far as we know, there isn’t one available for a 1999 Pontiac Grand Am. Good luck on your search.

  • Reply Sean H June 27, 2009 at 5:56 pm

    ModifiedLife, I just got a 1999 Grand Am and the stock wiring harness has been cut off, so now all I see is all the wires that USED to be connected to the wiring harness. Do you know where I could get a replacement stock wiring harness. I see all these after market ones but im not sure if they will work. Could you point me in the right direction? Thanks!

  • Reply ModifiedLife July 6, 2009 at 11:46 pm

    Sean, unfortunately the only place you can get a replacement factory harness is from your local Pontiac dealer or if you’re lucky you can find one at a local junk yard. Hope this helps. Good luck.

  • Reply Joe April 10, 2010 at 10:16 am

    I recently went to replace my door speakers this weekend. But when pulling off my door panel and removing the speaker I seen the wires attached to the speaker are not the normal color patterns I normally see on GM cars. The left (driver side) door speaker wires were Dark Red and Light Red. So this has thrown me for a loop. Any suggestions. Thank you.

  • Reply Eric December 1, 2010 at 2:01 pm

    Does my 99 pontiac grand am have an inline fuse? No power and replaced all potential fuses.

  • Reply ryan January 5, 2012 at 11:03 pm

    i have a 1999 pontiac grand am es and was wondering if there were any double din stereos that fit better than others. or if there was a double din to single din converter that fits in the stock mount?

  • Reply ModifiedLife January 9, 2012 at 4:20 pm

    Ryan, you can fit a single DIN radio. Here are the components you need to install an aftermarket single DIN stereo in your 1999 Pontiac Grand Am:

    Single DIN Car Stereo for 1999 Pontiac Grand Am
    Radio Wire Harness for 1999 Pontiac Grand Am
    Single DIN Dash Kit for 1999 Pontiac Grand Am

    With the car stereo wiring harness and car radio dash kit, you should be able to install your after market radio with ease. 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 Grand Am stereo installation.

  • Reply Jeff May 5, 2012 at 5:03 pm

    ModifiedLife, I just got a 1999 pontiac Grand Am and the stock wiring harness has been cut off, so now all I see is all the wires that USED to be connected to the wiring harness. Matched everything that i could up with my new stereo im putting however i have no power from the constant and no power to my stereo at all?? Any Ideas

  • Reply ModifiedLife May 9, 2012 at 1:46 am

    Jeff, double check ALL your fuses using an Automotive Fuse Tester because certain vehicles may have a wire tied into another circuit not labeled as car radio. You may have additional fuse boxes by the driver side of the dash, passenger side of the dash, driver kick panel, passenger kick panel, under the steering column or under the hood. Hope this helps. Good luck with your 1999 Pontiac Grand Am radio troubleshooting.

  • Reply Marissa January 10, 2013 at 2:19 pm

    My boyfriend has a 1999 Pontiac Grand Am, and I bought him an after market stereo for Christmas. I went to install it, and I have done over a dozen stereos before, and it worked for a second and then stopped. I believe the stereo is messed up itself. He drove it for a few days, and went to start it the other morning and now it won’t start…. When you have the key in and ON only have the dash lights come on and if you push on the brake they turn off. Also, when you remove the key from the ignition the dome lights flicker for awhile… I have no idea what is going on and if it has anything to do with the stereo wire?! Please Help!

  • Reply ModifiedLife February 5, 2013 at 8:16 pm

    Marissa, double check ALL your fuses using an Automotive Fuse Tester and make sure all of your fuses are not blown. If all of your fuses are good, you may have shorted out your 1999 Pontiac Grand Am stereo or you may have shorted out the wiring going to your head unit. We suggest you take your car to an experienced audio installer and have them troubleshoot your problem. Hope this helps. Good luck with your 1999 Pontiac Grand Am radio troubleshooting.

  • Leave a Reply

    five × 3 =