Body Control Module Connector End View - (BCM) C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		638277-3 52-Way F AMP (BK)
Pin	Wire Color	Circuit Number	Function
1	BK	860	Front Windshield Wiper Switch High Signal
2	WH	1459	Security System Sensor Supply Voltage
3	PK	1439	Ignition 1 Voltage
4	BK	28	Horn Relay Control
5	-	-	Not Used
6	BK	707	RAP Relay Control
7	BK/WH	1969	Headlamp High Beam Relay Control
8	D-GN/WH	1317	Fog Lamp Relay Control
9	PK/WH	1970	Headlamp Low Beam Relay Control
10	WH	1080	Park Lamp Relay Control
11	YE	749	Security Indicator Control
12	GY	91	Windshield Wiper Switch Signal 2
13	YE	196	Windshield Wiper Motor Park Switch Signal
14	BK	1835	Security System Sensor Low Reference
15	L-GN/BK	1137	DRL Ambient Light Sensor Signal
16	L-GN	526	Stop Lamp Switch Signal
17	BK	1750	Ground
18-19	-	-	Not Used
20	BK	1950	Ground
21	YE	5	Crank Voltage
22	PK	1239	Ignition 1 Voltage
23	BN	1141	Ignition 3 Voltage
24	TN	185	Low Washer Fluid Indicator Signal
25	WH/BK	644	12 Volt Reference
26	-	-	Not Used
27	GY	598	10 Volt Reference
28	BK	552	Low Reference
29	BN/WH	230	I/P Dimming Return
30	PK	1444	I/P Dimming Control
31	RD/WH	812	I/P Dimming Voltage Reference
32-33	-	-	Not Used
34	BN/WH	1571	Traction Control Switch Signal
35	-	-	Not Used
36	PK/BK	1597	Courtesy Lamps Switch On Signal
37	BK/WH	1455	Keyless Entry Program Enable Signal
38	L-GN	1037	BCM Class 2 Serial Data
39	WH	17	Stop Lamp Switch Signal
40	L-GN	80	Key In Ignition Switch Signal
41	L-BU/WH	1314	Left Front Turn Signal Lamp Supply Voltage
42	D-BU/WH	1315	Right Front Turn Signal Lamp Supply Voltage
43	GY/BK	690	Courtesy Lamp Supply Voltage
44	OG	1732	Inadvertant Power Courtesy Lamp
45	-	-	Not Used
46	OG	340	Battery Positive Voltage
47	RD	228	Windshield Washer Pump Control
48	GY	8	Instrument Panel Lamp Supply Voltage
49	D-GN/WH	1135	A/T Shift Lock Control Solenoid Supply Voltage
50	OG	240	Battery Positive Voltage
51	OG	2440	Battery Positive Voltage
52	OG	1240	Battery Positive Voltage