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: Blower Motor
Connector 5: Blower Motor Resistor
Connector 6: Evaporator Temperature Sensor
Connector 7: HVAC Control Module C1
Connector 8: HVAC Control Module C2
Connector 9: Mode Actuator
Connector 10: Recirculation Actuator

A/C Compressor Clutch


Object Number: 684807  Size: CH

Connector Part Information

  • OEM: 12110293
  • Service: 12110293
  • Description: 3-Way F Metri-Pack 150 Series Sealed (BK)

A/C Compressor Clutch

Pin

Wire Color

Circuit No.

Function

A

BK

350

Ground

B

D-GN

59

A/C Compressor Clutch Supply Voltage

C

--

--

Not Used

A/C Refrigerant Pressure Sensor


Object Number: 726824  Size: CH

Connector Part Information

  • OEM: 15344137
  • Service: 88988301
  • Description: 3-Way F GT 150 Series Sealed 5.2 (BK)

A/C Refrigerant Pressure Sensor

Pin

Wire Color

Circuit No.

Function

1

BK

2751

Low Reference

2

GY

2700

5-Volt Reference

3

RD/BK

380

A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator


Object Number: 281207  Size: CH

Connector Part Information

  • OEM: 12040953
  • Service: 12102632
  • Description: 6-Way F Micro-Pack 100 Series (BK)

Air Temperature Actuator

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

D-BU

1199

Air Temperature Door Control

7

YE

1791

Low Reference

8

--

--

Not Used

9

L-BU

733

Air Temperature Door Position Signal

10

D-BU/BK

1688

5-Volt Reference

Blower Motor


Object Number: 826317  Size: CH

Connector Part Information

  • OEM: 7123-6020
  • Service: 88987849
  • Description: 2-Way F Unsealed (NA)

Blower Motor

Pin

Wire Color

Circuit No.

Function

1

RD

542

Battery Positive Voltage

2

OG

52

Blower Motor High Control

Blower Motor Resistor


Object Number: 697053  Size: CH

Connector Part Information

  • OEM: 12129565
  • Service: 15306069
  • Description: 4-Way F Metri-Pack 280 Series Sealed (GY)

Blower Motor Resistor

Pin

Wire Color

Circuit No.

Function

A

TN

63

Blower Motor Medium 1 Control

B

L-BU

72

Medium 2 Blower Motor Control

C

OG

52

Blower Motor High Control

D

YE

60

Blower Motor Low Control

Evaporator Temperature Sensor


Object Number: 1283885  Size: CH

Connector Part Information

  • OEM: 174921-1
  • Service: 88953272
  • Description: 3-Way F Metri-Pack Mixed Series (WH)

Evaporator Temperature Sensor

Pin

Wire Color

Circuit No.

Function

1

D-GN/WH

762

A/C Request Signal

2

GY

6137

A/C Request Signal

3

BK

2250

Ground

HVAC Control Module C1


Object Number: 697022  Size: CH

Connector Part Information

  • OEM: 174046-2
  • Service: 88987953
  • Description: 16-Way F Metri-Pack Mixed Series (BK)

HVAC Control Module C1

Pin

Wire Color

Circuit No.

Function

1

D-BU

1646

Auxiliary Air Temperature Door Position Signal

2-4

--

--

Not Used

5

BN/WH

230

Instrument Panel Lamps Dimming Control

6-7

--

--

Not Used

8

YE

1791

Low Reference

9

WH/BK

1236

Auxiliary Air Temperature Door Control

10

D-BU

1199

Air Temperature Door Control

11

L-BU

292

Rear Defog Switch Signal

12

D-GN/WH

762

A/C Request Signal

13

PK/WH

1648

Recirculation Door Control A

14

L-GN/BK

1647

Recirculation Door Control B

15

D-BU/BK

1688

5-Volt Reference

16

L-BU

733

Air Temperature Door Position Signal

HVAC Control Module C2


Object Number: 401382  Size: CH

Connector Part Information

  • OEM: 174045-2
  • Service: 88987954
  • Description: 12-Way F Metri-Pack Mixed Series (BK)

HVAC Control Module C2

Pin

Wire Color

Circuit No.

Function

1

OG

52

Blower Motor High Control

2

L-BU

72

Medium 2 Blower Motor Control

3

OG

52

Blower Motor High Control

4

L-BU

72

Medium 2 Blower Motor Control

5

BK

2250

Ground

6

TN

63

Blower Motor Medium 1 Control

7

BK

2250

Ground

8

YE

60

Blower Motor Low Control

9

BK

2250

Ground

10

BN

341

Ignition 3 Voltage

11

Not Used

12

OG

4340

Battery Positive Voltage

Mode Actuator


Object Number: 281207  Size: CH

Connector Part Information

  • OEM: 12040953
  • Service: 12102632
  • Description: 6-Way F Micro-Pack 100 Series (BK)

Mode Actuator

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

WH/BK

1236

Auxiliary Air Temperature Door Control

7

YE

1791

Low Reference

8

--

--

Not Used

9

D-BU

1646

Auxiliary Air Temperature Door Position Signal

10

D-BU/BK

1688

5-Volt Reference

Recirculation Actuator


Object Number: 704047  Size: CH

Connector Part Information

  • OEM: 12059110
  • Service: 88953271
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Recirculation Actuator

Pin

Wire Color

Circuit No.

Function

A

PK/WH

1648

Recirculation Door Control A

B

L-GN/BK

1647

Recirculation Door Control B