GM Service Manual Online
For 1990-2009 cars only
Connector 1: A/C Compressor Clutch
Connector 2: A/C Refrigerant Pressure Sensor
Connector 3: Air Temperature Actuator
Connector 4: Air Temperature Sensor Inside
Connector 5: Ambient Air Temperature Sensor
Connector 6: Blower Motor
Connector 7: Blower Motor Control Module
Connector 8: Coolant Temperature Sensor
Connector 9: HVAC Control Module - A
Connector 10: HVAC Control Module - B
Connector 11: Mode Actuator
Connector 12: Recirculation Actuator
Connector 13: Sunload Sensor

A/C Compressor Clutch


Object Number: 684852  Size: CH

Connector Part Information

  • OEM: 12162017
  • Service: N/A
  • Description: 2-Way F Metri-Pack 150 Series, Sealed (GY)

A/C Compressor Clutch

Pin

Wire Color

Circuit No.

Function

A

D-BU

59

A/C Compressor Clutch Supply Voltage

B

BK

1150

Ground

A/C Refrigerant Pressure Sensor


Object Number: 258299  Size: CH

Connector Part Information

  • OEM: 12078090
  • Service: N/A
  • Description: 3-Way F Metri-Pack 150 Series (BK)

A/C Refrigerant Pressure Sensor

Pin

Wire Color

Circuit No.

Function

A

L-GN

413

Low Reference (Sirius D4)

L-BU

469

Low Reference (ITMS-6F)

YE/BN

632

Low Reference (MR-140)

B

BN/BK

705

5-Volt Reference (Sirius D4)

D-GN/WH

705

5-Volt Reference (ITMS-6F)

BN/BK

1688

5-Volt Reference (MR-140)

C

L-BU

380

A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator


Object Number: 1467023  Size: CH

Connector Part Information

  • OEM: MG610203
  • Service: N/A
  • Description: 7-Way F 118 (PA) Series (BK)

Air Temperature Actuator

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BK

1199

Low Reference

3

BN

1812

5-Volt Reference

4

--

--

Not Used

5

YE

1791

Low Reference

6

YE/BK

1819

Lower Mode Door Position Signal

7

L-BU

1316

Air Temperature Door Control

Air Temperature Sensor Inside


Object Number: 1468403  Size: CH

Connector Part Information

  • OEM: MG620074
  • Service: N/A
  • Description: 2-Way M 090 Series (WH)

Air Temperature Sensor Inside

Pin

Wire Color

Circuit No.

Function

1

D-GN

1910

Inside Air Temperature Sensor Signal

2

YE

61

Low Reference

Ambient Air Temperature Sensor


Object Number: 1468380  Size: CH

Connector Part Information

  • OEM: PB625-02027
  • Service: N/A
  • Description: 2-Way F NMWP 04F-B Series (BK)

Ambient Air Temperature Sensor

Pin

Wire Color

Circuit No.

Function

1

WH

61

Low Reference

2

BN/BK

735

Ambient Air Temperature Sensor Signal

Blower Motor


Object Number: 1467007  Size: CH

Connector Part Information

  • OEM: MG610043
  • Service: N/A
  • Description: 2-Way F 250 Series (WH)

Blower Motor

Pin

Wire Color

Circuit No.

Function

1

PK

743

Blower Motor Speed Signal

2

YE

744

Blower Motor Supply Voltage

Blower Motor Control Module


Object Number: 1468410  Size: CH

Connector Part Information

  • OEM: MG610269
  • Service: N/A
  • Description: 6-Way F 250 D/L Series

Blower Motor Control Module

Pin

Wire Color

Circuit No.

Function

1

D-BU

188

Blower Motor Resistor Assembly Supply Voltage

2

--

--

Not Used

3

BK

350

Ground

4

GY/BK

754

Blower Motor Speed Control

5

--

--

Not Used

6

PK

743

Blower Motor Speed Signal

Coolant Temperature Sensor


Object Number: 1467020  Size: CH

Connector Part Information

  • OEM: MG610070
  • Service: N/A
  • Description: 2-Way F 090 (2.3 mm) Series (WH)

Coolant Temperature Sensor

Pin

Wire Color

Circuit No.

Function

1

YE

61

Low Reference

2

GY/BK

1596

Coolant Temperature Sensor Signal

HVAC Control Module - A


Object Number: 1468412  Size: CH

Connector Part Information

  • OEM: 51155-1615
  • Service: N/A
  • Description: 16-Way F (WH)

HVAC Control Module - A

Pin

Wire Color

Circuit No.

Function

1

D-GN

1910

Inside Air Temperature Sensor Signal

2

--

--

Not Used

3

OG

1140

Battery Positive Voltage

4

YE

61

Low Reference

5

--

--

Not Used

6

D-GN/WH

762

A/C Request Signal

7

D-BU/BK

247

High Speed Blower Relay Control

8

--

--

Not Used

9

YE

1791

Low Reference

10-11

--

--

Not Used

12

BN

41

Ignition 3 Voltage

13

BN/WH

309

Right Park Lamp Voltage

14

D-GN

44

Instrument Panel Lamps Dimmer Switch Signal

15

L-BU

1316

Air Temperature Door Control

16

BK

350

Ground

HVAC Control Module - B


Object Number: 1467032  Size: CH

Connector Part Information

  • OEM: 51155-2015
  • Service: N/A
  • Description: 20-Way F Connector (WH)

HVAC Control Module - B

Pin

Wire Color

Circuit No.

Function

1

PK/BK

1399

Mode Valve Signal

2

WH/BK

1398

Mode Valve Signal

3

YE/ D-BU

1397

Lower Mode Valve Solenoid Control

4

PK

1396

Defrost Mode Valve Solenoid Control

5

D-GN/BK

1395

Upper Mode Valve Solenoid Control

6

--

--

Not Used

7

D-GN/BK

1674

Recirculation Door Control B

8

PK/WH

1648

Recirculation Door Control A

9

D-BU

188

Blower Motor Resistor Assembly Supply Voltage

10

BK

350

Ground

11

L-BU/BK

590

Sunload Sensor Signal

12

GY/BK

1596

Coolant Temperature Sensor Signal

13

L-GN/BK

735

Ambient Air Temperature Sensor Signal

14

D-GN

95

Windshield Washer Switch Signal

15

BK

1199

Air Temperature Door Control

16

YE/BK

1814

Lower Mode Door Position Signal

17

BN

1812

Low Reference

18

--

--

Not Used

19

D-GN/RD

817

Vehicle Speed Signal

20

GY/BK

754

Blower Motor Speed Signal

Mode Actuator


Object Number: 1467023  Size: CH

Connector Part Information

  • OEM: MG610203
  • Service: N/A
  • Description: 7-Way F 118 (PA) Series (BK)

Mode Actuator

Pin

Wire Color

Circuit No.

Function

1

YE/D-BU

1397

Lower Mode Valve Solenoid Control

2

PK

1396

Defrost Mode Valve Solenoid Control

3

D-GN/BK

1395

Upper Mode Valve Solenoid Control

4

BN

41

Ignition 3 Voltage

5

BK

350

Ground

6

PK/BK

1399

Mode Valve Signal

7

WH/BK

1398

Mode Valve Signal

Recirculation Actuator


Object Number: 1467023  Size: CH

Connector Part Information

  • OEM: MG610203
  • Service: N/A
  • Description: 7-Way F 118 (PA) Series (BK)

Recirculation Actuator

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Used

4

BN

41

Ignition 3 Voltage

5

PK/WH

1648

Recirculation Door Control A

6

--

--

Not Used

7

D-GN/BK

1647

Recirculation Door Control B

Sunload Sensor


Object Number: 1467049  Size: CH

Connector Part Information

  • OEM: MG610489
  • Service: N/A
  • Description: 2-Way F 090 (2.3 mm) Series (WH)

Sunload Sensor

Pin

Wire Color

Circuit No.

Function

1

YE

61

Low Reference

2

L-BU/BK

590

Sunload Sensor Signal