Transfer Case Control Connectors

WARNING: This page is about a different car, the 2004 GMC Yukon XL and 2004 GMC Yukon. However, it is still accessible from the selected car via links, so may be relevant.

Transfer Case Shift Control Module - C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12084944 16-Way F Micro-Pack 100 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A1	DK GRN/ WHT	1133	ATC Class 2 Serial Data
A2-A3	-	-	Not Used
A4	PPL/WHT	1565	4 LO Indicator Control
A5	PNK	1561	AWD Indicator Control
A6	LT BLU	1693	Switch Signal
A7	RED/WHT	1556	Channel C Encoder - Signal
A8	-	-	Not Used
B1	-	-	Not Used
B2	YEL/BLK	1558	Channel B Encoder - Signal
B3	-	-	Not Used
B4	BRN	1560	Neutral Indicator Control
B5	GRY/BLK	1694	4WD Low Signal
B6	BRN/WHT	1555	Channel P Encoder - Signal
B7-B8	-	-	Not Used

Transfer Case Shift Control Module - C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12110259 16-Way F Micro-Pack 100 Series (GRN)
Pin	Wire Color	Circuit No.	Function
A1-A7	-	-	Not Used
A8	BLK/WHT	1554	Encoder Signal Ground
B1-B5	-	-	Not Used
B6	DK BLU/ WHT	1557	Channel A Encoder - Signal
B7	-	-	Not Used
B8	GRY	596	5-Volt Reference

Transfer Case Shift Control Module - C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12052856 4-Way F Micro-Pack 280 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A	BLK	2150	Ground
B	ORN	1640	Battery Positive Voltage
C	RED	1553	Motor Control A
D	BLK	1552	Motor Control B

Transfer Case Shift Control Switch - C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12064862 8-Way F Metri-Pack 150 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A	BLK	1050	Ground
B	-	-	Not Used
C	BRN	1560	Neutral Indicator Control
D	-	-	Not Used
E	PPL/WHT	1382	LED Dimming Supply
F	BRN/WHT	230	Instrument Panel Lamps Dimming Control
G	BRN	241	Ignition 3 Voltage
H	GRY	596	5-Volt Reference

Transfer Case Shift Control Switch - C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12064860 6-Way F Metri-Pack 150 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A-B	-	-	Not Used
C	PNK	1561	AWD Indicator Control
D	PPL/WHT	1565	4 LO Indicator Control
E	-	-	Not Used
F	LT BLU	1693	Switch Signal

Transfer Case - Encoder Motor

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15326906 10-Way F GT280 Sealed (BLK)
Pin	Wire Color	Circuit No.	Function
A	BLK/WHT	1554	Encoder Signal Ground
B	BRN/WHT	1555	Channel P Encoder - Signal
C	RED/WHT	1556	Channel C Encoder - Signal
D	BLK	1552	Motor Control B
E	RED	1553	Motor Control A
G	PNK	39	Ignition 1 Voltage
H	LT BLU	1693	Switch Signal
F	-	-	Not Used
G	YEL/BLK	1558	Channel B Encoder - Signal
H	DK BLU/ WHT	1557	Channel A Encoder - Signal