Body Control Module (BCM) C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110088 24-Way F Micro-Pack 100 Series (L-GY)
Pin	Wire Color	Circuit No.	Function
A1	-	-	Not Used
A2	WH	2283	12 Volt Reference
A3	TN/BK	254	Door Unlock Relay Control
A4	PK/WH	1970	Headlamp Low Beam Relay Control
A5	D-GN/WH	1317	Fog Lamp Relay Control
A6	GY/BK	255	Door Lock Relay Control
A7	L-GN	1391	Driver Door Unlock Relay Control
A8-A10	-	-	Not Used
A11	RD/WH	812	12 Volt Reference
A12	OG	1140	Battery Positive Voltage
B1	BK/WH	1969	Headlamp High Beam Relay Control
B2	WH	1080	Park Lamp Relay Control
B3	-	-	Not Used
B4	L-GN/BK	592	DRL Relay Control
B5	-	-	Not Used
B6	BK/WH	751	Ground
B7	BK	1835	Security System Sensor Low Reference
B8	-	-	Not Used
B9	BK	28	Horn Relay Control
B10	-	-	Not Used
B11	GY	705	5 Volt Reference
B12	L-GN	1037	BCM Class 2 Serial Data