Blower Motor Control Processor Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12129565 Connector 12129566 Connector Seal 15300022 4-Way F Metri-Pack 280 Series Sealed (GRY)
Pin	Wire Color	Circuit No.	Function
A	BLK	150	Ground
B	ORN	40	Battery Positive Voltage
C	GRY/BLK	754	Blower Motor Speed Control
D	-	-	Not Used