Body Control Module (BCM) - C4

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110206 24-Way F Micro-Pack 100 Series (L-BU)
Pin	Wire Color	Circuit No.	Function
A1	L-GN	80	Key In Ignition Switch Signal
A2	YE	307	Headlamp Switch Flash to Pass Signal
A3	PK	1020	Ignition 0 Voltage
A4	PK	39	Ignition 1 Voltage
A5	L-GN	1177	Door Open Switch Signal
A6	-	-	Not Used
A7	L-BU	1134	Park Brake Switch Signal
A8-A9	-	-	Not Used
A10	YE/BK	1181	Rear Door Open Switch Signal (Passenger/Cargo)
A11	-	-	Not Used
A12	WH	103	Headlamp Switch Headlamps On Signal
B1-B2	-	-	Not Used
B3	YE	343	Accessory Voltage
B4	TN	126	Left Front Door Open Switch Signal
B5	L-BU	195	Door Lock Control (AU3)
B6	GY/BK	2226	Dimming Return
B7-B8	-	-	Not Used
B9	D-BU/WH	1495	Courtesy Lamps On Signal
B10	WH	194	Door Unlock Control (AU3)
B11-B12	-	-	Not Used