HVAC Control Module W/CJ2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15356937 12-Way M (BLK) Dock N loc Series RW
Pin	Wire Color	Circuit No.	Function
A1	BLK/WHT	351	Ground
A2	BRN	41	Ignition 3 Voltage
A3-A4	-	-	Not Used
A5	BLK	350	Ground
A6	-	-	Not Used
B1	YEL	1491	Backlight Lamps Control
B2-B4	-	-	Not Used
B5	PPL	1881	HVAC Control Module Clock Signal
B6	LT BLU	1880	HVAC Control Module Data Signal