HVAC Control Module Connector End Views

HVAC Control Module C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 1318917-1 Service: See Catalog 24-Way F 0.25 Series (NAT)
Pin	Wire Color	Circuit No.	Function
1	L-BU	292	Rear Defogger Switch Signal
2	L-GN/BK	1647	Recirculation Door Control B
3	PK/WH	1648	Recirculation Door Control A
4	PU	361	Defrost Mode Valve Solenoid Control A
5	PU/WH	3361	Defrost Mode Valve Solenoid Control B
6-7	-	-	Not Used
8	GY	705	5-Volt Reference
9	WH	193	Rear Defogger Relay Control
10	L-GN	66	A/C Request Signal
11	GY	8	Instrument Panel Lamp Supply Voltage
12	BK/WH	151	Ground
13	YE	60	Blower Motor Low Control
14	L-GN/BK	3366	Lower Mode Valve Solenoid Control B
15	L-GN/WH	366	Lower Mode Valve Solenoid Control A
16	OG	362	Upper Mode Valve Solenoid Control A
17	OG/WH	3362	Upper Mode Valve Solenoid Control B
18-19	-	-	Not Used
20	YE/BK	713	Defrost Mode Valve Position Sensor Signal
21	YE/BK	1814	Lower Mode Door Position Sensor Signal
22	OG	708	Mode Door Position Signal
23	TN	407	Low Reference
24	BN	41	Ignition 3 Voltage

HVAC Control Module C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		OEM: 7283-5591-40 Service: See Catalog 6-Way F YESC/USCAR Class III Series (L-GY)
Pin	Wire Color	Circuit No.	Function
1	PU	73	Medium 3 Blower Motor Control
2	TN	63	Blower Motor Medium 1 Control
3	YE	268	Blower Motor Relay Common
4	YE	60	Blower Motor Low Control
	YE	60	Blower Motor Low Control
5	-	-	Not Used
6	L-BU	72	Blower Motor Medium 1 Control