I/P Harness Connector End View

C1 I/P Harness

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		KET MG 641234 76-Way F SSD & 0509 (BK)
Pin	Wire Color	Circuit No.	Function
1	BN	-	Ignition 2 Voltage
2	BN	-	Ignition 2 Voltage
2	BN	-	Ignition 2 Voltage
3	BN/WH	-	Illumination Feed
4-7	-	-	Not Used
8	L-BU	-	Park Lamp Switch Output
9	-	-	Not Used
10	RD/WH	-	Battery Voltage
11	-	-	Not Used
12	BK	-	Ground
13-14	-	-	Not Used
15	OG	-	Fog Lamp Indicator Feed - Rear
16-17	-	-	Not Used
18	BN/WH	-	Brake Warning Indicator Lamp Output
19-22	-	-	Not Used
23	RD/WH	-	Battery Voltage
23	RD/WH	-	Battery Voltage
24	BN	-	Oil Pressure Indicator Lamp Output
25	L-GN	-	Key Reminder Switch Signal
26	WH	-	Rear Defogger Relay Control
27	RD/WH	-	Battery Voltage
28-29	-	-	Not Used
30	L-BU	-	Windshield Wiper Switch Signal - Mist/Off/Low
31	GY	-	Windshield Wiper Relay Feed-Coil
32	-	-	Not Used
33	RD/WH	-	Battery Voltage
33	RD/WH	-	Battery Voltage
34	BN/WH	-	Seat Belt Switch Signal
34	BN/WH	-	Seat Belt Switch Signal
35	-	-	Not Used
36	OG	-	Ignition Switch Output - Ignition 2 Voltage
37	L-GN	-	Multi-Function Chime Control Signal
38	BN	-	Ignition 2 Voltage
38	BN	-	Ignition 2 Voltage
39	D-GN	-	Horn Relay Control
40	-	-	Not Used
41	RD/WH	-	Battery Voltage
42	-	-	Not Used
43	YE	-	Power Door Lock Relay Feed-Coil Driver Door Unlock
44	GY/D-GN	-	Power Door Lock Anti-Lockout Relay Feed-Coil
45	RD/WH	-	Battery Voltage
46	-	-	Not Used
47	YE	-	Accessory Voltage
48-49	-	-	Not Used
50	WH	-	Courtesy Lamp Output
50	WH	-	Courtesy Lamp Output
51-53	-	-	Not Used
54	L-BU	-	Rear Defogger Switch Signal - Primary
55	YE	-	Fog Lamp Relay Output-Coil - Rear
56	PK	-	Ignition 1 Voltage
57	-	-	Not Used
58	RD/WH	-	Battery Voltage
59	-	-	Not Used
60	YE	-	Accessory Voltage
60	YE	-	Accessory Voltage
61	YE	-	Accessory Voltage
62	PK	-	Ignition 1 Voltage
63-64	-	-	Not Used
65	PK	-	Ignition 1 Voltage
66	RD/WH	-	Battery Voltage
67	PU/WH	-	Vehicle Speed Sensor Signal
68	PK	-	Ignition 1 Voltage
68	PK	-	Ignition 1 Voltage
69	-	-	Not Used
70	PK	-	Ignition 1 Voltage
71	BK/WH	-	Dual Zone Switch Signal-Offset
72	PK	-	Ignition 1 Voltage
73	BN	-	Ignition Switch Output - Ignition 1
74	PK	-	Ignition Switch Output - Accessory
75	-	-	Not Used
76	L-BU	-	Power Door Lock Relay Feed - Lock Coil

C2 I/P Harness

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		KET MG 641234 20-Way F SSD & 0509 (WH)
Pin	Wire Color	Circuit No.	Function
1	RD/WH	-	Battery Voltage
2	-	-	Not Used
3	WH	-	Courtesy Lamp Output
4-5	-	-	Not Used
6	WH	-	Power Door Lock Relay Feed - Unlock Coil
7	-	-	Not Used
8	GY	-	Power Door Lock Motor Feed - Lock
9	OG	-	Heated Mirror Element Feed
10	PK	-	Ignition 1 Voltage
11	GY	-	Interior Lamp Output
12	-	-	Not Used
13	YE	-	Accessory Voltage
14	-	-	Not Used
15	OG	-	Rear Defog Relay Output
16	OG	-	Fog Lamp Feed - Rear
17	WH	-	Courtesy Lamp Output
18	L-BU	-	Power Door Lock Relay Feed - Lock Coil
19	-	-	Not Used
20	BN	-	Power Door Lock Motor Feed - Unlock

C3 I/P Harness

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		KET MG 651074-2 18-Way F 090-II Connector (BU)
Pin	Wire Color	Circuit No.	Function
1	PU	-	Power Window Enable Relay Output - N.O. Contact
2	WH	-	Park Lamp Relay Output-Coil
3	PK	-	Windshield Washer Switch Signal
4	L-BU	-	Stop Lamp Signal (LHD)
5	PK	-	Ignition 1 Voltage
6	BN/WH	-	Brake Warning Indicator Lamp Output
7	-	-	Not Used
8	BN	-	Horn Relay Output-Coil
9	BN/WH	-	Park Lamp Feed - Right
10	D-GN/WH	-	Fog Lamp Relay Output-Coil
10	D-GN/WH	-	Fog Lamp Relay Output-Coil
11	WH	-	Headlamp Relay Feed-Coil
12	PK	-	Ignition 1 Voltage
13	RD/BK	-	Battery Voltage
14	BN	-	Windshield Wiper Motor Feed - Low Speed
15	-	-	Not Used
16	PK	-	Ignition 1 Voltage
17	PK	-	Ignition 1 Voltage
18	-	-	Not Used