Underhood Fuseblock Connector End View

C1 Underhood Fuseblock Connector End View/Part Information/Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		AMP 174257-2 32-Way F (BK)
Pin	Wire Color	Circuit No.	Function
1	L-BU	-	Fuel Gage Sensor Signal - Right
2	PU	-	Sensor Return
3	BN	-	Sensor Return
4	BN	-	Sensor Return
5	PU	-	Ignition 1
6	-	-	Not Used
7	PU	-	Ignition 1
8	BN	-	Oxygen Sensor Return
9	PU	-	Oxygen Sensor Signal - Right Rear of Catalytic Converter
10	BN	-	Oxygen Sensor Return - Right Rear of Catalytic Converter
11	L-BU	-	Fuel Gage Sensor Signal - Right
12	PU	-	Sensor Return
13	BN	-	Sensor Return
14	YE	-	Low Beam Headlamp Feed - Left
15	PU/WH	-	Air Conditioning Compressor Clutch Coil Enable Signal
16	BN	-	Vehicle Speed Signal - 4000 Pulses Per Mile - Tertiary
17	RD/WH	-	Battery Voltage
18	-	-	Not Used
19	PU	-	Ignition 1
20	PU	-	Ignition 1
21	PU	-	Ignition 1
22	-	-	Not Used
23	L-GN	-	Fuel Pump Relay Output - Coil Secondary
24	PK	-	Ignition 1
25	BK	-	Ground
26	PK	-	Ignition 1
27	PK	-	Ignition 1
28	-	-	Not Used
29	PK	-	Ignition 1
30	PK	-	Ignition 1
31	BU	-	Vehicle Speed Signal
32	GY/GN	-	Power Door Lock Anti-Lockout Relay Feed-Coil

C2 Underhood Fuseblock

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		PK 145-20017 (KUM) 32-Way F (WH)
Pin	Wire Color	Circuit No.	Function
1-2	-	-	Not Used
3	PK	-	Ignition 1 High/Low Relay Control
4	RD/BK	-	Battery Voltage
5-6	-	-	Not Used
7	RD/BK	-	Battery Voltage
7	RD/BK	-	Battery Voltage
8	-	-	Not Used
9	WH	-	Power Window Relay Control
10	RD/BK	-	TCM Signal Voltage
11	L-BU	-	Turn Signal Supply Voltage
12	L-BU	-	Turn Signal Supply Voltage
13	L-BU	-	Turn Signal Supply Voltage
14	PU	-	Power Window Relay Coil
15	BN/WH	-	Position Illumination Voltage
16	BN/WH	-	Position Illumination Voltage
17	L-BU	-	Headlamp High Relay Coil
18	RD/WH	-	Battery Voltage
19	-	-	Not Used
20	D-GN/WH	-	Front Fog Lamp Signal
21	PK	-	Ignition 1 High/Low Relay Control
22	PK	-	Ground
23-24	-	-	Not Used
25	YE	-	Fog Lamp Relay Output - Common Contact
26	RD/BK	-	Battery Voltage
27	WH	-	Park Lamp Relay Output-Coil
28	L-GN/BU	-	Battery Voltage
29	BN	-	ABS Pulse Width Modulated Solenoid Feed - Rear
30	L-GN/BU	-	Battery Voltage
31-32	-	-	Not Used

C3 Underhood Fuseblock

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		AMP 174257-2 32-Way F (BK)
Pin	Wire Color	Circuit No.	Function
1	BU	-	Turn Signal Lamp Feed - Right Front
2	BU	-	Turn Signal Lamp Feed - Right Front
3	RD/WH	-	Battery Voltage
4	YE	-	Fog Lamp Relay Output - Common Contact
5	L-GN/BU	-	High Beam Headlamp Feed - Right
6	BN/WH	-	Low Beam Headlamp Feed - Right
7	YE	-	Low Beam Headlamp Feed - Left
8	PU	-	Park Lamp Feed - Left
9	BN	-	Wheel Speed Sensor Signal - Left Front
10	-	-	Not Used
11	BU	-	Turn Signal Lamp Feed - Right Front
12-13	-	-	Not Used
14	PU	-	Park Lamp Feed - Left
15	-	-	Not Used
16	BN	-	Oxygen Sensor Return - Right - Rear of Catalytic Converter
17	-	-	Not Used
18	BK	-	Ground
19	BK	-	Ground
20	OG	-	Electronic Control Unit Output - 12-Volt Inadvertent Load Control
21	YE	-	Low Beam Headlamp Feed - Left
22	PU	-	Oxygen Sensor Signal - Right - Rear of Catalytic Converter
23	BK	-	Ground
24	BK	v	Ground
25	BN/WH	-	Park Lamp Feed - Right
26	GN/WH	-	High Beam Headlamp Feed - Left
27	GY	-	Coolant Fan Motor Feed - Secondary
28	L-BU	-	Coolant Fan Motor Feed
29	OG/BK	-	Reference Voltage Feed - 12-Volt Reference
30	PU	-	Ignition 1
31	PU	-	Ignition 1
32	BN	-	Oxygen Sensor Return

C4 Underhood Fuseblock

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		KET MG 651068 2-Way F 090-II Series (WH)
Pin	Wire Color	Circuit No.	Function
1	RD	-	ABS Module Supply Voltage
2	RD	-	ABS Module Supply Voltage