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Radio Console wireing

I'm tring to find out the color combination on the back of a 2003 Chevy TrailBlazer radio, so that I could hook up a car ampliflier threw the factor speakers.

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  • Christopher Renner
    Christopher Renner May 11, 2010

    Does this vehicle have a Bose sound system or OnStar, and are you adding a new head unit or are you just trying to insert an amp in between the factory head unit and the factory speakers?

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A decent auto repair manual for your 2003 Chevy TrailBlazer (such as Chilton's, Clymers, Haynes, etc...) with a complete wiring diagram should give you the color codes for the factory speaker wiring. You can probably find and copy the pages you need at your local Public Library too.
Good Luck.

Posted on Feb 25, 2008

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2 Answers

What's the Motorola box under my back seat Chevy trailblazer 02 also I'm hooking a amp to battery where do I connect the amp turn on wire I guess it be remote wire


The motorolla box may be remnants of an old disk changer for the stereo. With an amp your power wire goes into the positive wire that goes to your battery, your ground wire will be connected to some bare metal close to wherever you decide to install the amp, and the blue remote wire will be connected to the remote wire that in on the wiring harness of your aftermarket radio ( I'm sure your not installing an amp with your stock radio). Good luck I hope this helps

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Stereo wiring diagram for 2005 Chevy trailblazer


Hi there:
Check this on 2005 Chevrolet Trailblazer Car Stereo Wiring Chart...

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.
Car Radio Ground Wire: Black/White
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: N/A
Car Audio Front Speakers Location: N/A
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: N/A
Car Audio Rear Speakers Location: N/A
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

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

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Jun 25, 2012 | Cars & Trucks

1 Answer

Wiring for a 2004 trailblazer stereo


Here are the factory wire colors.
2004 Chevrolet Trailblazer Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Orange
Car Radio Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
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
Rear Speakers Size: N/A
Rear Speakers Location: N/A
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

May 26, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

I need to know the wire color code for 2004 Chevy express van. I want to hook up new radio, but not sure how to hook them up to new radio.


I recommend getting a wiring harness. If you "hardwire" this radio, you risk frying your electronics. Unless you want to spend about $2500 for new vehicle electronics. Good luck

Aug 16, 2011 | Car Audio & Video

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My speakers at back does not work on my chevy 2007


First, check that the balance switchon the radio has not been set to front only. If not, then pull the radio out and check the speaker wires at the back of the radio for connectivity, if ok, then do the same for the speakers, remove them and check the wires. Hope that helps

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The radio was pulled off the wiring 2005 Chevy avalanche. How do I match the after market plug to the wiring in the truck? I have the 71-2003-1 parts but the colors do not match.


2005 Chevrolet Avalanche Car Stereo Installation Guide
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: N/A
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: Dark Green
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: Under the Center Console.
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
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: N/A
Car Audio Rear Speakers Location: N/A
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

Hope this will help you, good luck

Jan 05, 2010 | 2005 Chevrolet Avalanche

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Hyundai Matrix audio wiring


2004 Chevrolet Trailblazer Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Orange
Car Radio Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
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
Rear Speakers Size: N/A
Rear Speakers Location: N/A
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

pls rate

Jun 10, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

I need to find the colors for the rear speakers to hook up a amp


2003 Mercury Sable Car Radio Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
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: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink

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02 Chevy Blazer Audio Wiring Diagram


they are your speeker wires. the best the to do is to hook up the colors that are the same color to the color wires on the back of the radio. dont hook them all up at once two colors at a time.by doing this it will let you know what speaker you have hooked up.

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