GM Service Manual Online
For 1990-2009 cars only
Table 1: Front Axle Switch Connector
Table 2: Transfer Case Shift Control Module Connector
Table 3: Transfer Case Shift Select Switch Connector C1
Table 4: Transfer Case Select Switch Connector C2
Table 5: Electric Shift Transfer Case Connector

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

Transfer Case Shift Control Module Connector


Object Number: 73221  Size: CH

Connector Part Information

    • 12041476
    • 32 Way F Micro-Pack 100 Series (BLU)

Pin

Wire Color

Circuit No.

Function

C1

GRY/BLK

1694

4WD Drive Switch Signal - Low

C2

--

--

Not Used

C3

DK GRN/WHT

1559

4 "LO" Select Switch Output

C4

DK GRN/WHT

1562

2 'HI' Select Switch Output

C5

GRA/BLK

1564

4 "HI" Select Switch Output

C6

ORN

40

Fuse Output - Battery

C7

--

--

Not Used

C8

BRN

241

Fuse Output - Ignition 3

C9

BLK/WHT

1554

Transfer Case Encoder Signal Return

C10

BLK

1050

Ground

C11

LT GRN/BLK

1563

2 'HI' Indicator Lamp Output

C12

TAN/BLK

1566

4 'HI' Indicator Lamp Output

C13

--

--

Not Used

C14

PPL/WHT

1565

4 "LO" Indicator Lamp Output

C15

--

--

Not Used

C16

BLK

1552

Transfer Case Motor Feed - CW

D1

RED

1553

Transfer Case Motor Feed - CCW

D2

LT GRN/BLK

584

Fuse Output - Brake Transmission Shift Interlock

D3

ORN

1568

Diagnostic Signal - Transfer Case Control Module

D4

BRN/WHT

1555

Transfer Position Switch Encoder Signal - Channel P

D5

RED/WHT

1556

Transfer Position Switch Encoder Signal - Channel C

D6

DK BLU/WHT

1557

Transfer Position Switch Encoder Signal - Channel A

D7

YEL/BLK

1558

Transfer Position Switch Encoder Signal - Channel B

D8

817

DK GRN/WHT

Vehicle Speed Signal - 4000 Pulses Per Mile

D9-D11

--

--

Not Used

D12

BLK

1050

Ground

D13

BLK

1050

Ground

D14

ORN

1640

Fuse Output - Battery

D15

ORN

1640

Fuse Output - Battery

D16

PPL

806

Fuse Output - Crank

Transfer Case Shift 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

GRA/BLK

1564

4 "HI" Select Switch Output

B

DK GRN/WHT

1562

2 "HI" Select Switch Output

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

F

DK GRN/WHT

1559

4 "LO" Select Switch Output

G

BLK

1050

Ground

H

GRA

1220

Fuse Output - Instrument Panel Lamps

Transfer Case Select Switch Connector C2


Object Number: 130635  Size: CH

Connector Part Information

    • 12045013
    • 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

D

--

--

Not Used

Electric Shift Transfer Case Connector


Object Number: 95786  Size: CH

Connector Part Information

    • 12124051
    • 8 Way F (BLK)

Pin

Wire Color

Circuit No.

Function

1

YEL/BLK

1558

Tranfer Case Position Switch Encoder Signal - Channel B

2

DK BLU/WHT

1557

Tranfer Case Position Switch Encoder Signal - Channel A

3

BLK/WHT

1554

Tranfer Case Encoder Signal Return

4

BRN/WHT

1555

Tranfer Case Position Switch Encoder Signal - Channel P

5

--

--

Not Used

6

RED

1553

Transfer Case Motor Feed - CCW

7

BLK

1552

Transfer Case Motor Feed - CW

8

RED/WHT

1556

Tranfer Case Position Switch Encoder Signal - Channel C