For the Panasonic CQ-DF583U car stereo, the typical wiring color codes are as follows:
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Yellow: Battery (constant power)
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Red: Ignition (switched power)
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Black: Ground
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White/White with Black stripe: Front left speaker (+/-)
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Gray/Gray with Black stripe: Front right speaker (+/-)
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Green/Green with Black stripe: Rear left speaker (+/-)
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Purple/Purple with Black stripe: Rear right speaker (+/-)
Always double-check with the specific manual or wiring diagram for your model to ensure accuracy.