HVAC Control Module C1 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110088 24-Way F Micro-Pack 100 Series (GY)
Pin	Wire Color	Circuit No.	Function
A1	RD/WH	440	Battery Positive Voltage
A2	BN	141	Ignition 3 Voltage
A3	-	-	Not Used
A4	D-GN/WH	762	A/C Request Signal
A5	L-BU	292	Rear Defog Switch Signal
A6	L-GN/BK	1647	Recirculation Door Control B
A7	D-BU	1199	Air Temperature Door Control A
A8	YE	1791	Air Temperature Door Control B
A9	GY	597	5-Volt Reference
A10	L-BU	733	Air Temperature Door Position Signal
A11	TN	808	Low Reference
A12	BK/WH	651	Ground
B1	GY	8	Instrument Panel Lamp Supply Voltage
B2	BN	9	Park Lamp Supply Voltage
B3-B4	-	-	Not Used
B5	TN	683	Rear Defog Indicator Supply Voltage
B6	PK/WH	1648	Recirculation Door Control A
B7	TN	2273	Mode Door Control A
B8	WH	119	Mode Door Control B
B9	GY	596	5-Volt Reference
B10	OG	708	Mode Door Position Signal
B11	TN	552	Low Reference
B12	-	-	Not Used