HVAC Control Module Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110206 24-Way F Micro-Pack 100 Series (L-BU)
Pin	Wire Color	Circuit No.	Function
A1	BK	552	Low Reference
A2	-	-	Not Used
A3	WH	2622	Evaporator Temperature Sensor Signal
A4	L-BU/BK	590	Sunload Sensor Signal
A5-A6	-	-	Not Used
A7	GY/BK	754	Blower Motor Speed Control
A8	OG	761	Blower Motor Speed Signal
A9	-	-	Not Used
A10	BK	150	Ground
A11	BN	241	Ignition 3 Voltage
A12	OG	640	Battery Positive Voltage
B1	D-BU	1646	Right Air Temperature Door Position Signal
B2	L-BU	733	Left Air Temperature Door Position Signal
B3	YE/BK	713	Mode Door Position Signal
B4	GY	598	5-Volt Reference
B5	WH/BK	1236	Right Air Temperature Door Control
B6	D-BU	1199	Left Air Temperature Door Control
B7	TN	2273	Mode Door Control
B8	TN/BK	2274	Recirculation Door Control
B9	WH	1038	Class 2 Serial Data
B10	-	-	Not Used
B11	WH	193	Rear Defog Relay Control
B12	GY	8	Instrument Panel Lamp Supply Voltage