HVAC Control Module Connector End Views

HVAC Control Module C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		174046-2 16-Way F Metri-Pack Mixed Series (BK)
Pin	Wire Color	Circuit No.	Function
1	D-BU	1646	Auxiliary Air Temperature Door Position Signal
2-4			Not Used
5	BN/WH	230	Instrument Panel Lamps Dimming Control
6-7	-	-	Not Used
8	YE	1791	Low Reference
9	WH/BK	1236	Auxiliary Air Temperature Door Control
10	D-BU	1199	Air Temperature Door Control
11	L-BU	292	Rear Defog Switch Signal
12	D-GN/WH	762	A/C Request Signal
13	PK/WH	1648	Recirculation Door Control A
14	L-GN/BK	1647	Recirculation Door Control B
15	D-BU/BK	1688	5-Volt Reference
16	L-BU	733	Air Temperature Door Position Signal

HVAC Control Module C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		174045-2 12-Way F Metri-Pack Mixed Series (BK)
Pin	Wire Color	Circuit No.	Function
1	OG	52	Blower Motor High Control
2	L-BU	72	Medium 2 Blower Motor Control
3	OG	52	Blower Motor High Control
4	L-BU	72	Medium 2 Blower Motor Control
5	BK	2250	Ground
6	TN	63	Blower Motor Medium 1 Control
7	BK	2250	Ground
8	YE	60	Blower Motor Low Control
9	BK	2250	Ground
10	BN	341	Ignition 3 Voltage
11			Not Used
12	OG	4340	Battery Positive Voltage