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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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