HVAC Control Module Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110244 24-Way F Micro-Pack 100 Series (PK)
Pin	Wire Color	Circuit No.	Function
A1	-	-	Not Used
A2	OG	1040	Battery Positive Voltage
A3	-	-	Not Used
A4	PK	739	Ignition 1 Voltage
A5	BK/WH	1551	Ground
A6-A8	-	-	Not Used
A9	WH/BK	1236	Air Temperature Door Control B
A10	D-BU	1646	Air Temperature Door Control A
A11	L-GN/BK	1647	Recirculation Door Control B
A12	PK/WH	1648	Recirculation Door Control A
B1	-	-	Not Used
B2	WH	1038	HVAC Class 2 Serial Data
B3-B4	-	-	Not Used
B5	GY	8	Instrument Panel Lamp Supply Voltage
B6	BK	150	Ground
B7-B8	-	-	Not Used
B9	GY/BK	754	Blower Motor Speed Control
B10	TN	2273	Mode Door Control B
B11	L-GN	2275	Mode Door Control A
B12	-	-	Not Used