Question about 2002 Buick Century
Red is hot and black is ground the speaker wires are color coded unless you are installing a completely different radio
Posted on Sep 13, 2009
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Posted on Jan 02, 2017
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dont know about a or b but here is diagram by color code
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
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