Transfer Case Shift Control Module Connector End View

Transfer Case Shift Control Module C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12084944 16-Way F Micro-Pack 100 Series (BK)
Pin	Wire Color	Circuit No.	Function
A1	D-GN/WH	1133	ATC Class 2 Serial Data
A2	L-BU	1296	Axle Actuator - Control
A3	PK	1561	AWD Indicator Control
A4	PU/WH	1565	4 LO Indicator - Control
A5	TN/BK	1566	4 HI Indicator - Control
A6	L-BU	1693	Switch Signal
A7	BK/WH	1554	Encoder Low Reference
A8	-	-	Not Used
B1	-	-	Not Used
B2	TN	1569	Lock Solenoid Control
B3	L-GN/BK	1563	2 HI Indicator - Control
B4	BN	1560	Neutral Indicator Control
B5	GY/BK	1694	4WD Low Signal
B6	BN/WH	1555	Encoder Signal
B7	-	-	Not Used
B8	BK/WH	751	Ground

Transfer Case Shift Control Module C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12084945 16-Way F Micro-Pack 100 Series (GY)
Pin	Wire Color	Circuit No.	Function
A1	PU	401	Signal Low - Front
A2	YE	400	Signal High - Front
A3-A7	-	-	Not Used
A8	GY	605	5-Volt Reference
B1	L-BU	2221	Signal High - Rear
B2	D-GN	2222	Signal Low - Rear
B3-B5	-	-	Not Used
B6	BK/WH	1695	Axle Switch Signal
B7	-	-	Not Used
B8	GY	596	5-Volt Reference

Transfer Case Shift Control Module C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052856 4-Way F Metri-Pack 280 Series (BK)
Pin	Wire Color	Circuit No.	Function
A	BK	2250	Ground
B	OG	1640	Battery Positive Voltage
C	BK	1552	Motor Control A
D	RD	1553	Motor Control B