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hello i’m sure there is a post on here with someone showing the wire diagram for the 05 ct’s v head unit but i can’t find it. i have a after market radio it turns on but no sound i know it’s a amp issue as in the amp isn’t getting power and maybe i have wires mixed up but i’m stupid and i didn’t get a adapter for the wires if some one can please help that would be greatly appreciated thank you.
 

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It sounds like you may need an interface for your car’s audio system. I had the same problem with my 2001 Deville, aftermarket head unit turned on, but no sound. Had to install the interface to make it work properly.
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Talk to the guys at Crutchfield tomorrow. They have all the necessary jumpers, connectors, and harnesses.

For instant wiring schematics online, subscribe the car to www.alldatadiy.com - the online GM/Cadillac/Helm service manuals.
 
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