GM Service Manual Online
For 1990-2009 cars only
Table 1: Transfer Case Control Module
Table 2: Transfer Case Select Switch
Table 3: Transfer Case Encoder (C2)
Table 4: Transfer Case Shift Motor (C1)
Table 5: Front Axle Actuator
Table 6: Transfer Case Switch

Transfer Case Control Module


Object Number: 449163  Size: CH

Connector Part Information

    • 12045470
    • 32 Way F Micro-Pack 100 Series (NAT)

Pin

Wire Color

Circuit No.

Function

C1

BLK/WHT

1695

4WD Engaged 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

275

Park/Neutral Position Switch Signal - Park

D3

ORN

1568

Diagnostic Signal - Transfer Case Control Module

D4

BRN/WHT

1555

Transfer Case Encoder Signal Channel P

D5

RED/WHT

1556

Transfer Case Encoder Signal Channel C

D6

DK BLU/WHT

1557

Transfer Case Encoder Signal Channel A

D7

YEL/BLK

1558

Transfer Case Encoder Signal Channel B

D8

DK GRN/WHT

817

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

Park/Neutral Position Switch Signal - Park and Neutral

Transfer Case Select Switch


Object Number: 62464  Size: CH

Connector Part Information

    • 12064769
    • 10 Way F Metri-Pack 150 Series (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 Input

F

TAN/BLK

1566

4 HI Indicator Lamp Input

G

LT GRN/BLK

1563

2 HI Indicator Lamp Input

H

BLK

150

Ground

J

GRA

8

Instrument Panel Lamp Feed

K

--

--

Not Used

Transfer Case Encoder (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

Encoder Signal Ground

B

DK BLU/WHT

1557

Encoder Output - Channel A

C

RED/WHT

1556

Encoder Output - Channel C

D

YEL/BLK

1558

Encoder Output - Channel B

E

LT GRN/BLK

431

Reference Voltage Input - 8 V

F

BRN/WHT

1555

Encoder Output - Channel P

Transfer Case Shift Motor (C1)


Object Number: 258847  Size: CH

Connector Part Information

    • 15300002
    • 2 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1552

Motor Feed - Clockwise

B

RED

1553

Motor Feed - Counterclockwise

Front Axle Actuator


Object Number: 365944  Size: CH

Connector Part Information

    • 12077591
    • 5 Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

1695

4WD Engaged Output Signal

B

GRY/BLK

1570

Front Axle Actuator Control Input

C

BRN

241

Fuse Output - Ignition 3 - Type II Output

D

--

--

Not Used

E

BLK

150

Ground

Transfer Case Switch


Object Number: 62453  Size: CH

Connector Part Information

    • 12059595
    • 3 Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

GRY/BLK

1694

4WDLow Range Output

C

BLK/WHT

1570

Front Axle Actuator Control