GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Transfer Case Control Connector End Views
Table 1: Transfer Case Shift Control Module Connector C1
Table 2: Transfer Case Shift Control Module Connector C2
Table 3: Transfer Case Select Switch Connector C1
Table 4: Transfer Case Select Switch Connector C2
Table 5: Transfer Case Encoder Motor Connector C1
Table 6: Transfer Case Encoder Motor Connector C2
Table 7: Front Drive Axle Clutch Solenoid Connector
Table 8: Front Axle Switch Connector
Table 9: Front Transfer Case Speed Sensor Connector
Table 10: Rear Transfer Case Speed Sensor Connector

Transfer Case Shift Control Module Connector C1


Object Number: 73221 Size: CH

Connector Part Information
    • 12052107
    • 16 Way F Micro-Pack 100 Series (ORN)

Pin

Wire Color

Circuit No.

Function

E1

Tan

1569

Transfer Case Lock Soleniod Output

E2

--

--

Not Used

E3

PNK

1561

AWD/4WD Indicator Lamp Output

E4

Lt GRN/BLK

1563

2 HI Indicator Lamp Output

E5

BRN/WHT

1555

Transfer Case Position Switch Encoder Signal

E6

RED/WHT

1556

Transfer Case Position Switch Encoder Signal

E7

YEL/BLK

1558

Transfer Case Position Switch Encoder Signal

E8

DK BLU/WHT

1557

Transfer Case Position Switch Encoder Signal

E9

DK GRN/WHT

1133

Class 2 Serial Data Signal

E10

BRN

241

Fuse Output - Ignition 3 - Type III Fuse

E11

PPL

806

Fuse Output - Crank - Type III Fuse

E12

YEL

400

Vehicle Speed Sensor Signal

E13

PPL

401

Vehicle Speed Sensor Return

E14

BLK/WHT

1695

Four Wheel Drive Front Wheel Lock Telltale

E15

--

--

Not Used

E16

BLK/WHT

451

Engine Control Module Ground

F1

PPL/WHT

1565

4 LO Indicator Lamp Output

F2

TAN/BLK

1566

4 HI Indicator Lamp Output

F3

BRN

1560

Neutral Indicator Lamp Output

F4

GRA/BLK

1570

Front Axle Actuator Output

F5

LT BLU

2221

Vehicle Speed Sensor Signal

F6

DK GRN

2222

Vehicle Speed Sensor Return

F7

GRA/BLK

1694

Four Wheel Drive Switch Signal - Low

F8 - F11

--

--

Not Used

F12

BLK/WHT

1554

Transfer Case Encoder Signal Return

F13

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt Reference

F14

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt Reference

F15

--

--

Not Used

F16

LT BLU

1693

Four Wheel Drive Switch Signal

Transfer Case Shift Control Module Connector C2


Object Number: 62450 Size: CH

Connector Part Information
    • 12052856
    • 4 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Transfer Case Motor Feed - Clockwise

B

RED

1553

Transfer Case Motor Feed - Counterclockwise

C

BLK

1050

Ground

D

ORG

1640

Fuse Output - Battery - Type III Fuse

Transfer Case Select Switch Connector C1


Object Number: 62463 Size: CH

Connector Part Information
    • 12064766
    • 8 Way F Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt Reference

B

LT BLU

1693

Four Wheel Drive Switch Signal

C

PPL/WHT

1565

4 LO Indicator Lamp Output

D

TAN/BLK

1566

4 HI Indicator Lamp Output

E

LT GRN/BLK

1563

2 HI Indicator Lamp Output

F

PNK

1561

AWD/4WD Indicator Lamp Output

G

BLK

1050

Ground

H

GRA

1220

Fuse Output - IP Lamps - Type III

Transfer Case Select Switch Connector C2


Object Number: 130635 Size: CH

Connector Part Information
    • 12045813
    • 4 Way F Metri-Pack 150 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

PPL/WHT

1382

LED Dimming Signal

C

BRN

241

Fuse Output - Ignition 3 - Type III Fuse

D

BRN

1560

Neutral Indicator Lamp Output

Transfer Case Encoder Motor Connector C1


Object Number: 365977 Size: CH

Connector Part Information
    • 12191399
    • 4 Way F Metri-Pack 280 Series, Flexlock, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Transfer Case Motor Feed - Clockwise

B

RED

1553

Transfer Case Motor Feed - Counterclockwise

C

ORN

1640

Fuse Output - Battery - Type III Fuse

D

TAN

1569

Transfer Case Lock Solenoid Output

Transfer Case Encoder Motor Connector C2


Object Number: 62449 Size: CH

Connector Part Information
    • 12052848
    • 6 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

1554

Transfer Case Encoder Signal Return

B

DK BLU/WHT

1557

Transfer Case Position Switch Encoder Signal

C

RED/WHT

1556

Transfer Case Position Switch Encoder Signal

D

YEL/BLK

1558

Transfer Case Position Switch Encoder Signal

E

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt Reference

F

BRN/WHT

1555

Transfer Case Position Switch Encoder Signal

Front Drive Axle Clutch Solenoid Connector


Object Number: 35437 Size: CH

Connector Part Information
    • 12052641
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

241

Fuse Output - Ignition 3 - Type III Fuse

B

GRA/BLK

1570

Front Axle Actuator Output

Front Axle Switch Connector


Object Number: 38552 Size: CH

Connector Part Information
    • 12103584
    • 2 Way F Weather Pack Connector (BRN)

Pin

Wire Color

Circuit No.

Function

A

BRN

241

Fuse Output - Ignition 3 - Type III Fuse

B

BLK/WHT

1695

Four Wheel Drive Front Wheel Lock Telltale

Front Transfer Case Speed Sensor Connector


Object Number: 232831 Size: CH

Connector Part Information
    • 12162194
    • 2 Way F Metri-Pack 150.2 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

400

Vehicle Speed Sensor Signal

B

PPL

401

Vehicle Speed Sensor Return

Rear Transfer Case Speed Sensor Connector


Object Number: 232831 Size: CH

Connector Part Information
    • 12162194
    • 2 Way F Metri-Pack 150.2 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

2221

Vehicle Speed Sensor Signal

B

DK GRN

2222

Vehicle Speed Sensor Return