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2003 Honda Civic Preamp Outputs

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=16569
Printed Date: June 18, 2025 at 8:07 AM


Topic: 2003 Honda Civic Preamp Outputs

Posted By: Infidel
Subject: 2003 Honda Civic Preamp Outputs
Date Posted: July 22, 2003 at 11:36 AM

Hi there.

Thanks in advance for the assistance.

Does the CD player contained in the 2003 Honda Civic EX have preamp outputs and remote leads for the installation of an aftermarket amplifier?

I don't want to rip apart my dash to find out.

Regards,

Ed




Replies:

Posted By: esmith69
Date Posted: July 22, 2003 at 12:04 PM

Are you referring to the separate factory cd player?  Or did the car come with a cd player/radio combo unit?

Either way there's no preamp outputs already in the vehicle.  You'll have to use a 4-channel line output converter if you're installing a 4-channel aftermarket amplifier, or a 2-channel line output converter if it's just a sub amp.

The aftermarket amp's remote turn on connection can be made by just tapping in to the +12v switched wire in the radio's harness.  Here's the wiring info I have for the 03 civic--as always, verify these wires with a DMM first before making connections to them.

BATTERYWHITE+IGNITION SWITCH HARNESS
GROUNDBLACK-RADIO HARNESS
ACCESSORY 01YELLOW+IGNITION SWITCH HARNESS
ILLUMINATIONRED / BLACK+RADIO HARNESS
DIMMERRED+RADIO HARNESS
FRONT LEFT SPEAKERBLUE+ 
FRONT LEFT SPEAKERGRAY/BLACK- 
FRONT RIGHT SPEAKERRED / GREEN+ 
FRONT RIGHT SPEAKERBROWN / BLACK- 
REAR LEFT SPEAKERBLUE / YELLOW+ 
REAR LEFT SPEAKERGRAY/WHITE- 
REAR RIGHT SPEAKERRED / YELLOW+ 
REAR RIGHT SPEAKERBROWN / WHITE



-------------
Ethan
-----
"Patience, persistence, and perspiration make an unbeatable combination for success"
Donate to the12volt.com




Posted By: Infidel
Date Posted: July 22, 2003 at 12:09 PM
Just the cd player/radio combo unit that comes standard with the EX.




Posted By: esmith69
Date Posted: July 22, 2003 at 12:11 PM

yea right after I posted my first reply I realized it didn't really matter what type of system it was.  It's not gonna have preouts regardless.  so i updated my post with some more info



-------------
Ethan
-----
"Patience, persistence, and perspiration make an unbeatable combination for success"
Donate to the12volt.com




Posted By: Infidel
Date Posted: July 22, 2003 at 12:18 PM

Thanks ethan. I think it's time to purchase a new head unit. I don't like the converters... Unless they've signifigantly improved since I was into this hobby (about 5 years ago).... the sound quality suffered.

Would be nice if I could find a head unit that completely enveloped the slot taken up by the stock head unit... I don't remember if it is the standard size or if I would have to use one of those ugly and cumbersome brackets..





Posted By: esmith69
Date Posted: July 22, 2003 at 10:29 PM
Actually you'd be surprised at how good aftermarket units look when used with this dash kit.  You can hardly even tell the difference.

-------------
Ethan
-----
"Patience, persistence, and perspiration make an unbeatable combination for success"
Donate to the12volt.com





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