GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Eldorado 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 HVAC Connector End Views
Table 1: A/C Compressor Clutch
Table 2: A/C Low Pressure Switch
Table 3: A/C High Pressure Switch
Table 4: A/C Refrigerant High Temperature Sensor
Table 5: A/C Refrigerant Low Temperature Sensor
Table 6: Air Temperature Actuator - Left
Table 7: Air Temperature Actuator - Right
Table 8: Air Temperature Sensor - Inside
Table 9: Air Temperature Sensor - Ambient
Table 10: Blower Motor
Table 11: Blower Motor - Auxiliary
Table 12: Blower Motor Resistor Assembly - Auxiliary
Table 13: Blower Motor Switch - Auxiliary
Table 14: HVAC Control Module
Table 15: HVAC Control Processor C1
Table 16: HVAC Control Processor C2
Table 17: Steering Wheel Controls -- Left (Steering Wheels Controls Harness Side)
Table 18: Sunload Sensor
Table 19: Vacuum Control Assembly

A/C Compressor Clutch


Object Number: 280759 Size: CH

Connector Part Information
    • 12162017
    • 2-Way F Metri-Pack 150 Series (MD GRY)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

59

A/C Compressor Clutch Supply Voltage

B

BLK

350

Ground

A/C Low Pressure Switch


Object Number: 35437 Size: CH

Connector Part Information
    • 12186685
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

339

Ignition 1 Voltage

B

DK GRN

603

A/C Low Pressure Switch Signal

A/C High Pressure Switch


Object Number: 333039 Size: CH

Connector Part Information
    • 12186686
    • 2-Way F Metri-Pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

603

A/C Low Pressure Switch Signal

B

DK BLU

604

A/C High Pressure Recirculation Switch Signal

A/C Refrigerant High Temperature Sensor


Object Number: 130692 Size: CH

Connector Part Information
    • 12092512
    • 2-Way (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

407

Low Reference

B

DK BLU

732

A/C Refrigerant High Temperature Sensor Signal

A/C Refrigerant Low Temperature Sensor


Object Number: 130692 Size: CH

Connector Part Information
    • 12092512
    • 2-Way (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

407

Low Reference

B

GRY

731

A/C Refrigerant Low Temperature Sensor Signal

Air Temperature Actuator - Left


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

LT GRN

147

Vacuum Control Assembly Supply Voltage

6

DK BLU/WHT

831

Left Air Temperature Door Control

7

BLK

407

Low Reference

8

--

--

Not Used

9

YEL/BLK

1814

Left Air Temperature Door Position Signal

10

GRY

705

5  Volt Reference

Air Temperature Actuator - Right


Object Number: 281207 Size: CH

Connector Part Information
    • 12040353
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5

LT GRN

147

Vacuum Control Assembly Supply Voltage

6

LT BLU/BLK

1880

Right Air Temperature Door Contol

7

BLK

407

Low Reference

8

--

--

Not Used

9

RED

708

Right Air Temperature Door Position Signal

10

GRY

705

5 Volt Reference

Air Temperature Sensor - Inside


Object Number: 82383 Size: CH

Connector Part Information
    • 12047662
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

407

Low Reference

B

DK GRN

734

Inside Air Temperature Sensor Signal

Air Temperature Sensor - Ambient


Object Number: 232831 Size: CH

Connector Part Information
    • 12162192
    • 2-Way F Metri-Pack 150.2 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

407

Low Reference

B

LT GRN/BLK

735

Ambient Air Temperature Sensor Signal

Blower Motor


Object Number: 333029 Size: CH

Connector Part Information
    • 12092310
    • 3-Way F Metri-Pack 480 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

50

Ground

B

GRY

754

Blower Motor Speed Control

C

RED

542

Battery Positive Voltage

Blower Motor - Auxiliary


Object Number: 130724 Size: CH

Connector Part Information
    • 12064869
    • 2-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

41

Ignition  3 Voltage

B

ORN

52

High Blower Motor Control

Blower Motor Resistor Assembly - Auxiliary


Object Number: 73229 Size: CH

Connector Part Information
    • 12129566
    • 4-Way F Metri-Pack 280 Series (MD GRY)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

72

Medium 1 Blower Motor Control

B

PPL

73

Medium 2 Blower Motor Control

C

ORN

52

High Blower Motor Control

D

TAN

63

Low Blower Motor Control

Blower Motor Switch - Auxiliary


Object Number: 39746 Size: CH

Connector Part Information
    • 12064862
    • 8-Way F Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

850

Ground

B

ORN

52

High Blower Motor Control

C

PPL

73

Medium 2 Blower Motor Control

D

LT BLU

72

Medium 1 Blower Motor Control

E

TAN

63

Low Blower Motor Control

F

GRY

8

Instrument Panel Lamp Supply Voltage - 1

G

BLK

850

Ground

H

--

--

Not Used

HVAC Control Module


Object Number: 73152 Size: CH

Connector Part Information
    • 12110259
    • 16-Way F Micro-Pack 100 Series (GRN)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

LT GRN

147

Vacuum Control Assembly Supply Voltage

A3

--

--

Not Used

A4

GRY

8

Instrument Panel Lamp Supply Voltage - 1

A5-A7

--

--

Not Used

A8

PPL

1807

Class 2 Serial Data

B1

RED

242

54 volt Vacuum Fluorescent Display Supply

B2

--

--

Not Used

B3

BLK

150

Ground

B4

GRY

8

Instrument Panel Lamp Supply Voltage - 1

B5

--

--

Not Used

B6

BLK/WHT

151

Ground

B7

--

--

Not Used

B8

PPL

1807

Class 2 Serial Data

HVAC Control Processor C1


Object Number: 130689 Size: CH

Connector Part Information
    • 12110244
    • 24-Way F Micro-Pack 100 Series (PNK)

Pin

Wire Color

Circuit No.

Function

A1

GRY

705

5 Volt Reference

A2

GRY

705

5 Volt Reference

A3

LT BLU

706

Recirculation Mode Valve Solenoid Control

A4

LT GRN/ WHT

274

Park Brake Valve Solenoid Control

A5

LT BLU/ BLK

1880

Right Air Temperature Door Control

A6

TAN

363

Upper Mode Valve Solenoid Control

A7

LT GRN/ BLK

366

Lower Mode Valve Solenoid Control

A8

PPL

361

Defrost Mode Valve Solenoid Control

A9

DK BLU/ WHT

831

Left Air Temperature Door Control

A10

YEL/BLK

1814

Left Air Temperature Door Position Signal

A11

RED

708

Right Air Temperature Door Position Signal

A12

LT GRN

147

Vacuum Control Assembly Supply Voltage

B1-B7

--

--

Not Used

B8

BLK

407

Low Reference

B9

BLK

407

Low Reference

B10

--

--

Not Used

B11

LT GRN

147

Vacuum Control Assembly Supply Voltage

B12

LT GRN

147

Vacuum Control Assembly Supply Voltage

HVAC Control Processor C2


Object Number: 73157 Size: CH

Connector Part Information
    • 12110207
    • 32-Way F Micro-Pack 100 Series (LT BLU)

Pin

Wire Color

Circuit No.

Function

C1-C2

--

--

Not Used

C3

ORN

2640

Battery Positive Voltage

C4

ORN

52

High Blower Motor Control

C5

DK BLU

732

A/C Refrigerant High Temperature Sensor Signal

C6

GRY

731

A/C Refrigerant Low Temperature Sensor Signal

C7

LT BLU/ BLK

590

Driver Sunload Sensor Signal

C8

LT GRN/ BLK

735

Ambient Air Temperature Sensor Signal

C9-C16

--

--

Not Used

D1

LT GRN

147

Vacuum Control Assembly Supply Voltage

D2

PPL

1807

Class 2 Serial Data

D3

GRY

754

Blower Motor Speed Control

D4

PPL

1807

Class 2 Serial Data

D5-D6

--

--

Not Used

D7

BLK/ WHT

151

Ground

D8

BLK

407

Low Reference

D9

DK GRN

734

Inside Air Temperature Sensor Signal

D10-D13

--

--

Not Used

D14

DK GRN

603

A/C Low Pressure Switch Signal

D15

DK BLU

604

A/C High Pressure Recirculation Switch Signal

D16

--

--

Not Used

Steering Wheel Controls -- Left (Steering Wheels Controls Harness Side)


Object Number: 605502 Size: CH

Connector Part Information
    • 50-57-9404
    • 4-Way F Molex (BLK)

Pin

Wire Color

Circuit No.

Function

1

BLU

--

Steering Wheel Controls Signal

2

YEL

--

Steering Wheel Controls Signal

3

WHT

--

Ground

4

GRN

--

Instrument Panel Lamp Supply Voltage - 1

Sunload Sensor


Object Number: 258301 Size: CH

Connector Part Information
    • 12059254
    • 2-Way M Metri-Pack 150 Series (LT GRN)

Pin

Wire Color

Circuit No.

Function

A

LT BLU/BLK

590

Driver Sunload Sensor Signal

B

BLK

407

Low Reference

Vacuum Control Assembly


Object Number: 40427 Size: CH

Connector Part Information
    • 12064978
    • 6-Way F Micro-Pack 100 Series (GRY)

Pin

Wire Color

Circuit No.

Function

1

LT GRN/ BLK

366

Lower Mode Valve Solenoid Control

2

PPL

361

Defrost Mode Valve Solenoid Control

3

TAN

363

Upper Mode Valve Solenoid Control

4

LT BLU

706

Recirculation Mode Valve Solenoid Control

5

LT GRN/ WHT

274

Park Brake Valve Solenoid Control

6

LT GRN

147

Vacuum Control Assembly Supply Voltage