HVAC Control Module Connector End View C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		174910-2 20-Way F 04 Series Multilock I/O (BK)
Pin	Wire Color	Circuit No.	Function
1	L-BU	292	Rear Defog 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	GY	705	5-Volt Reference
7	WH	193	Rear Defogger Relay Control
8	L-GN	66	A/C Request Signal
9	GY	8	Park Lamp Supply Voltage
10	BK/WH	151	Ground
11	YE	60	Blower Motor Low Control - Redundant
12	L-GN/WH	366	Lower Mode Valve Solenoid Control A
13	L-GN/BK	3366	Lower Mode Valve Solenoid Control B
14	RD	362	Upper Mode Valve Solenoid Control A
15	OG/WH	3362	Upper Mode Valve Solenoid Control B
16	YE/BK	713	Defrost Mode Valve Position Sensor Signal
17	YE/BK	1814	Lower Mode Door Position Signal
18	RD	708	Mode Door Position Signal
19	BK	407	Low Reference
20	BN	41	Ignition 3 Voltage