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2004 Honda Civic Radio Wiring

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Member - Posts: 1
Member spacespace
Joined: November 16, 2006
Posted: December 30, 2006 at 6:28 PM / IP Logged  

Can anyone tell me the colors of the 12v switched and ground for a 2004 Honda Civic?


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Joined: December 14, 2004
Location: Isle Of Man
Posted: December 30, 2006 at 10:43 PM / IP Logged  
+12V DC Battery(Constant)WHITE/ red  10 Amp Fuse box under hood 
Switched AccessoryYellow/red  7.5 Amp Fuse/relay box under dash 
Ground Black  
Illumination RED / black  
Left Front + GREEN/ black  
Left Front - Light green  
Right Front + GREEN/ YELLOW  
Right Front - Gray/red  
Left Rear + Blue/white  
Left Rear - Blue/black  
Right Rear + Pink  
Right Rear - Blue / YELLOW  
2004 Honda Civic Radio Wiring -- posted image. AT SPEAKERS 
Wire FunctionColorNote
Left Front Mid + GREEN/ black GREEN/ YELLOW for Hybrid and Sedan 
Left Front Mid - Light green Gray/red for Hybrid and Sedan 
Left Front Tweeter + GREEN/ black 
Left Front Tweeter - Light green 
Right Front Mid + GREEN/ YELLOW GREEN/ black for Hybrid and Sedan 
Right Front Mid - Gray/red Light green for Hybrid and Sedan 
Right Front Tweeter + GREEN/ YELLOW 
Right Front Tweeter - Gray/red 
Member - Posts: 1
Member spacespace
Joined: January 06, 2007
Posted: January 06, 2007 at 10:23 PM / IP Logged  

I have a 2001 Civic, which from what I've read has the same stereo wiring harness/pinout as the 2004.  Today I installed an aftermarket head unit.  There were four wires on the factory harness that did not correspond to any of the wires on the new HU.  There was a RED / black (illumination, which I gathered from this post), a red (dimmer, which I got from some other message board), plus a yellow/red and a YELLOW /GREEN.  I haven't found anything that these are for.  Currently I have them taped off.

Everything else appears to be wired up correctly.  When I turn the ignition to the acc. position, the needles and odometer display wig out for about 3 seconds, then appear to be fine.  The HU's power button becomes illuminated, but that's all I can get it to do for now.

Is there something I am missing?  I have installed a number of stereos in the past, but the latest model was a 1989 Cutlass Supreme.

Any insight would be greatly appreciated.  Thanks!


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Disclaimer: *All information on this site ( ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

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