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What is the light blue wire exiting cdx-l550x car stereo

I have figured out every thing on the wiring harness except a light blue wire. conections for four speakers, amp, ant, lights, power and ground. what is the extra wire

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  • icedude12163 Nov 15, 2008

    so i wont hook it up if i dont have an amp

  • CashManDad-O May 06, 2009

    I have a similar problem except I did cover it up but when I turn on the key I get great sound but as soon as I start the car the volume goes way down and sounds horrible! Any suggetions?! Please? thank you.

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  • 132 Answers

THE BLUE WIRE IS USUALLY POWER ON SIGNAL TO AMP FROM DECK HOPE THIS IS HELPFUL GLENN

Posted on Nov 15, 2008

  • glenn brown Nov 15, 2008

    THE TWO RC LEADS CARRY THE SOUND TO THE AMP THE BLUE WIRE TELLS THE AMP TO POWER UP AND POWER OFF WITH THE DECK

  • glenn brown Nov 15, 2008

    NO AMP ROLL IT UP AND PUT TAPE OVER THE END

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1 Answer

I dnt know how to hook my sony explode cdx gt 200 to my honda civic hatchback 94


The Honda Civic requires a dash adaptor you need this wiring harness to install the stereo it dont seem a dash adaptor is required for the 94 model you use the cage/sleeve to install the sony in your car you will also need this removal tool and either wire nuts, heat shrink tubing, crimp caps and crimp tool or the common solder and wrap in electrical tape method to connect the wiring harness for the honda to the wiring harness for the stereo

Oct 14, 2010 | Sony XPLOD CDX-GT200 CD Player

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No sound.


The first thing you need to do is doublechecking all the new wirings, it sounds like a contact.

Oct 24, 2008 | Kenwood KDC-MP338 Car CD Player

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CDX-RA700 CD Player: My wires on my sony CDX-RA700 do not match my 2005...


The following should help you. Good luck. Please rate. Radio 12v orange + radio harness Radio Ground black/orange - radio harness Radio Ignition yellow + radio harness Radio Illumination brown/white + radio harness Factory Amp Turn-on lt. green + radio harness Power Antenna gray + radio harness LF Speaker +/- tan - black +,- radio harness Notes: If equipped, the amplifier is in the passenger side of the trunk. RF Speaker +/- blue - red +,- radio harness LR Speaker +/- white - brown +,- radio harness RR Speaker +/- orange - green +,- radio harness
For the stereo the following will work.

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May 07, 2010 | Sony CDX-RA700 CD Player

2 Answers

Disc can eject and be inserted but display does not light up, none of the buttons do anything. tried a different deck and it does the same thing the display dosen't work and no music plays. i am thinking...


It sounds like they messed up your installation. You can confirm their work by verifying that each wire was attached properly.

2005 Pontiac Sunfire Car Radio Wiring Diagram Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: Pink
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
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

Click on this link for a PDF of the installation instructions of the radio (If you don't have the installation guide that came with the radio).

Illumination is the grey wire from the car to the orange with white stripe from the radio.

I suspect that the yellow wire from the car is not connected properly. When the orange wire (constant power from the car) is attached, but not the yellow wire you can insert and eject cds, but it will not turn on. Constant power is used for maintaining the clock and preset radio stations.

If everything looks correct, I would take your car back to the installer and have them correct the issue.

Dec 21, 2009 | Sony CDX-GT400 CD Player

1 Answer

I have a 2001 Dodge Ram 1500 that I'm trying to up grade my radio form a A and fm cassette to a dual CD cassette . I need help with wiring because they are different colors.I have the new 16 pin harness...


2001 Dodge Ram 1500 Car Radio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Red
Car Radio Accessory Switched 12v+ Wire: Red/White
Car Radio Ground Wire: Black/Dark Green
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: Orange/White
Car Stereo Antenna Trigger Wire: Yellow
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 (+): Dark Green
Left Front Speaker Negative Wire (-): Brown/Red
Right Front Speaker Positive Wire (+): Violet
Right Front Speaker Negative Wire (-): Dark Blue/Red
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown/Yellow
Left Rear Speaker Negative Wire (-): Brown/Light Blue
Right Rear Speaker Positive Wire (+): Dark Blue/White
Right Rear Speaker Negative Wire (-): Dark Blue/Orange

Sep 09, 2009 | Durabrand Car CD Player and AM/FM...

1 Answer

I need a wiring diagram for a sony CDX-RA700 car stereo, I already have the breakdown of the wires coming from my truck (since someone cut the original harness). Now I need to know what the ones comiong...


look on the wires... the letters are small but they should tell you...

Red is hot
Black Ground
Yellow constant
orange should be for antenna
blue is for remote

I can't remember the speaker breakdown... but again, look carefully, and you should see it.

Apr 10, 2009 | Sony CDX-RA700 CD Player

1 Answer

SONY CDX-M8800 STEREO


Red (accessory wire)- goes to hot wire that can be turned off.
Yellow (constant wire) goes to your cigarette lighter
Blue/white is your amplifier remote turn-on wire.
Probably have green and green/white- brown and brown/white-white and white/black, and another color for speaker wires.
You can hook one pair up to your cd player and find out if it's hooked up to the right speaker channel.
Orange (remote antenna) wire.

Apr 20, 2008 | Sony CDX-M8800 CD Player

2 Answers

Need to hook up a 200 pioneer stereo with wire harness from 96 honda accord to the wiring on a 64 impala


you'll need a small 12 v lamp to figure out which one has the power terminals. after mapping that out you need to find a small battery and hook it up to a pair of wires to figure out to which speaker the wires go to.

note : new car radios don't use the chassis ground as common (negative).. the head unit has a negative and positive wire for EACH speaker.

Mar 13, 2008 | Pioneer DEH-P6800MP CD Player

1 Answer

Sony CDX-MP40 won't power up the amp.


Most in-dash stereos have a blue wire in the harness which is used as a "wake up" signal for external amps. Did you connect this? Does it have any voltage on it when the stereo is on?

Mar 03, 2007 | Sony CDX-MP40 CD Player

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