Radio Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110088 24 Way F Micro-Pack 100 Series (LT GRY)
Pin	Wire Color	Function
A1-A7	-	Not Used
A8	BRN/BLK	Left Front Speaker (+)
A9	BRN/WHT	Left Front Speaker (-)
A10	GRY/BLK	Right Rear Speaker (-)
A11	GRY	Right Rear Speaker (+)
A12	BLK	Ground G200
B1	WHT	Battery Positive Voltage
B2	WHT/BLK	Ignition Positive Voltage
B3	-	Not Used
B4	RED/YEL	Illumination Control Input
B5	RED/GRN	Dimmer Control
B6-B7	-	Not Used
B8	LT GRN	Left Rear Speaker (+)
B9	LT GRN/BLK	Left Rear Speaker (-)
B10	ORN/BLU	Right Front Speaker (-)
B11	ORN	Right Front Speaker (+)
B12	RED/YEL	Illumination Control Input