Question about Car Audio & Video
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Posted on Jan 02, 2017
I'm guessing here, but power is usually a red, thick wire. seldom yellow ( old Pioneer)
Ground Is usually a thick black wire.
Amp turn on blue.(thin)
If it isn't, it ought to be.
If in doubt don't try it , check with a installer.
Fuse at battery!!!!!
Posted on Jun 11, 2008
SOURCE: i have a orion xtr2250
for information on your amplifier including wiring schematics got to this address:
and enter in your amplifiers information all files are in PDF form so get adobe acrobat reader its free download at download.com
Posted on Feb 04, 2009
I dont believe its used in your situation .
here is a rundown
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 or ignition switch harness for switched power.
Car Radio Ground Wire: Black/White
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
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
Posted on Mar 27, 2009
You may wish to consider purchasing a wiring harness that will allow you to plug directly into the vehicle harness without tapping or splicing. Here's a link to one such item: This one appears to be for your vehicle.
Installer.com shows the following color code for the radio and speaker wiring for the 2007 GMC Sierra.
Red: +12volt Acc Switched
Yellow: +12volt Battery Constant
Blue/White: +12v Remote Output (Amp Turn On)
Red/White: Reverse Light Trigger
Yellow/Black: Parking Break Trigger
Orange/White: Auto Illumination
Blue: Powered Antenna
Brown: Phone Mute (optional)
I would recommend that you verify the speaker wires before doing any splicing.
Attach a speaker to a pair of test probes and leaving the harness in and working, probe the back of each pair as coded above to insure that they really are the correct wires. Most likely you will want to convert the rears to low-level, so start with those. Probe the Violet(+)/Violet Black(-) pair and you should get sound in your test speaker. Likewise, do the Green(+)/Green Black(-) pair.
The only other wire you would need from the stock radio for an external amp would be the blue/white turn-on lead and if your LOC has audio sensing turn-on, you may not even need that. Bring power to your amp directly from the battery (fused according to amp manufacturer recommendations) and find a ground within 3 ft or so of where you intend to mount the amp.
Hope this helps.
Posted on Mar 28, 2009
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