GM Service Manual Online
For 1990-2009 cars only
Table 1: Transfer Case Module
Table 2: Transfer Case Select Switch
Table 3: Transfer Case Encoder Motor Connector C2
Table 4: Transfer Case Motor
Table 5: Front Axle Actuator
Table 6: Transfer Case Switch (Manual Transmission)
Table 7: Transfer Case Switch (Automatic Transmission)

Transfer Case Module


Object Number: 524759  Size: CH

Connector Part Information

    • 12045470
    • 32F M/P 100 Series (NAT)

Pin

Wire Color

Circuit No.

Function

C1

BLK/WHT

1695

4WD Front Wheel Lock Telltale Feed

C2

LT GRN/BLK

431

Reference Voltage Feed - 8 Volt Reference

C3

DK GRN/BLK

1559

4 LO Select Switch Output

C4

LT GRN/BLK

1562

2 HI Indicator Lamp Output

C5

GRA/BLK

1564

4 HI Select Switch Output

C6

ORN

1640

Fuse Output - Battery - Type III Fuse

C7

--

--

Not Used

C8

PNK

39

Fuse Output - Battery - Type III Fuse

C9

BLK/WHT

1554

Transfer Case Encoder Signal Return

C10

BLK

150

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

C15

--

--

Not Used

C16

BLK

1552

Transfer Case Motor Feed - CW

D1

RED

1553

Transfer Case Motor Feed - CCW

D2

LT GRN

273

HVAC Control Signal - Not Off

D3

ORN

156

Diagnostic Signal - Transfer ase Control Module

D4

BRN/WHT

1555

Transfer Position Switch

D5

RED/WHT

1556

Transfer Case Position Switch Encoder Signal

D6

DK BLU/WHT

1557

Transfer Case Position Switch Encoder Signal

D7

YEL/BLK

1558

Transfer Case Position Switch

D8

817

DK GRN/WHT

Vehicle Speed Signal - 4000 Pulses Per Mile

D9

--

--

Not Used

D10

BLK

150

Ground

D11

--

--

Not Used

D12

BLK

150

Ground

D13

BLK

150

Ground

D14

ORN

1640

Fuse Output - Battery - Type III Fuse

D15

ORN

1640

Fuse Output - Battery - Type III Fuse

D16

YEL

1737

Transmission Mounted Neutral Safety Switch

Transfer Case Select Switch


Object Number: 62464  Size: CH

Connector Part Information

    • 12064769
    • 10F M/P 150 (NAT)

Pin

Wire Color

Circuit No.

Function

A

PNK

39

Fuse Output - Ignition I Type III Fuse

B

DK GRN/WHT

1562

2 HI Select Switch Output

C

GRA/BLK

1564

4 HI Select Switch Output

D

DK GRN/WHT

1559

4 LO Select Switch Output

E

PPL/WHT

1565

4 LO Indicator Lamp Output

F

TAN/BLK

1566

4 HI Indicator Lamp Output

G

LT GRN/BLK

1563

2 HI Indicator Lamp

H

BLK

150

Ground

J

GRA

8

Park Lamp Feed

K

--

--

Not Used

Transfer Case Encoder Motor Connector C2


Object Number: 333040  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

Transfer Case Motor


Object Number: 232824  Size: CH

Connector Part Information

    • 15300002
    • 2F M/P 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Transfer Case Motor Feed - Clockwise

B

RED

1553

Transfer Case Motor

Front Axle Actuator


Object Number: 365944  Size: CH

Connector Part Information

    • 12077591
    • ASM 5F M/P 150 (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

1695

4WD Front Wheel Lock Telltale Feed

B

GRY/BLK

1570

Front Axle Actuator Output

C

BRN

241

Fuse Output - Ignition 3 - Type II Output

D

-

-

Not Used

E

BLK

150

Ground

Transfer Case Switch (Manual Transmission)


Object Number: 258174  Size: CH

Connector Part Information

    • 12015378
    • 2F W/P TWR SLD (GRY)

Pin

Wire Color

Circuit No.

Function

A

GRY/BLK

1570

Front Axle Actuator Output

B

BLK

150

Ground

Transfer Case Switch (Automatic Transmission)


Object Number: 38596  Size: CH

Connector Part Information

    • 12059595
    • 3F M/P 150 (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

241

Fuse Output - Ignition - 3 Type III Fuse

B

GRY/BLK

1694

4WD Switch signal - Low

C

BLK/WHT

1570

Front Axle Actuator Output