Question: Where can I find a 1999 Pontiac Grand Am radio wiring diagram? What are the 1999 Pontiac Grand Am radio wiring harness colors?
If you’re looking to change the radio in your 1999 Pontiac Grand Am or troubleshoot why your car radio stopped working, we’re here to help!
Our comprehensive 1999 Pontiac Grand Am radio wiring diagram shows you all the radio wire harness colors, car speaker wiring colors and car speaker sizes. Use our 1999 Pontiac Grand Am stereo wiring guide to help you with your car radio and installation needs.
In This Guide
1999 Pontiac Grand Am Radio Wiring Diagram
This 1999 Pontiac Grand Am radio wiring chart shows you all the 1999 Pontiac Grand Am radio wire colors and their functions. Utilize this guide to help you with a car radio install or help with a car radio troubleshoot. If you don’t see the car radio wiring information you’re looking for, please feel free to ask your question at the bottom of this page.
| Application | Radio Wire Color |
|---|---|
| Car Radio Battery Wire (Constant 12v+) | Orange |
| Car Radio Accessory Wire (Switched 12v+) | The radio harness does not provide a switched power source. Run a wire to the fuse box for switched power. |
| Car Radio Ground Wire | Black/White |
 Use a Car Radio Wiring Harness and Car Radio Dash Kit for an Easy Install! |
|
| Car Radio Illumination Wire | Gray |
| Car Stereo Dimmer Wire | Brown |
| Car Radio Antenna Trigger Wire | N/A |
| Car Radio Amp Trigger Wire | Pink |
| Car Radio Amplifier Location | Car amplifier is mounted behind the trim on the left side of the trunk. |
| Use an Amp Integration Harness to Connect Your Factory Amplifier to an aftermarket radio. |
|
1999 Pontiac Grand Am Speaker Wiring Guide
This 1999 Pontiac Grand Am speaker wiring chart shows you every speaker wire color and the speaker wire polarity. Use this 1999 Pontiac Grand Am speaker wiring guide to help you with a speaker replacement or speaker upgrade. If the car speaker wiring information you’re searching for is not listed, please don’t hesitate to ask for it at the bottom of this page.
| Application | Speaker Wire Color |
|---|---|
| Front Left Speaker Positive Wire (+) | Tan |
| Front Left Speaker Negative Wire (-) | Gray |
| Front Right Speaker Positive Wire (+) | Light Green |
| Front Right Speaker Negative Wire (-) | Dark Green |
| Use a Speaker Wire Harness for easy Speaker Installation! |
|
| Rear Left Speaker Positive Wire (+) | Brown |
| Rear Left Speaker Negative Wire (-) | Yellow |
| Rear Right Speaker Positive Wire (+) | Dark Blue |
| Rear Right Speaker Negative Wire (-) | Light Blue |
| Use a Steering Wheel Control Adapter to Keep Your Steering Wheel Controls. |
|
1999 Pontiac Grand Am Speaker Sizes and Location
This 1999 Pontiac Grand Am speaker size chart shows your speaker measurements and speaker locations. Use this chart to see what speaker fits in your 1999 Pontiac Grand Am.
| Application | Speaker Size and Location |
|---|---|
| Front Center Speaker Size | N/A |
| Front Center Speaker Depth | N/A |
| Front Center Speaker Location | N/A |
| Upgrade your Center Speakers for awesome sound! |
|
| Front Tweeter Size | N/A |
| Front Tweeter Depth | N/A |
| Front Tweeter Location | N/A |
| Upgrade your Tweeters for cleaner audio highs! |
|
| Front Speaker Size | 4″ Speakers |
| Front Speaker Depth | N/A |
| Front Speaker Location | Front Doors |
| Use a Speaker Wire Harness for easy Speaker Installation! |
|
| Rear Tweeter Size | N/A |
| Rear Tweeter Depth | N/A |
| Rear Tweeter Location | N/A |
| Use a Speaker Wire Harness for easy Speaker Installation! |
|
| Rear Speaker Size (Coupe) | 6 1/2″ Speakers |
| Rear Speaker Depth (Coupe) | N/A |
| Rear Speaker Location (Coupe) | Rear Deck |
| Rear Speaker Size (Sedan) | 6 1/2″ Speakers |
| Rear Speaker Depth (Sedan) | N/A |
| Rear Speaker Location (Sedan) | Rear Deck |
| Upgrade your Subwoofer for deeper lows! |
|
| Car Subwoofer Speaker Size | N/A |
| Car Subwoofer Speaker Depth | N/A |
| Car Subwoofer Speaker Location | N/A |
Questions and Answers
If you have any questions about your 1999 Pontiac Grand Am radio installation, please don’t hesitate to post them at the bottom of this page. We’re committed to finding the answers you need, and members of the Modified Life community may also provide valuable insights into the car stereo information you’re looking for. Don’t hesitate to ask your car audio question; it could benefit others seeking the same answers!
Contribute
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14 thoughts on “1999 Pontiac Grand Am Stereo Wiring Diagram”
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.
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!
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.
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
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.
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?
Does my 99 pontiac grand am have an inline fuse? No power and replaced all potential fuses.
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.
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.
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!
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.
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?
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.
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..