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 - Left
Connector 4: Air Temperature Actuator - Right
Connector 5: Blower Motor
Connector 6: Blower Motor High Speed Relay
Connector 7: Blower Motor Resistor Assembly
Connector 8: Evaporator Temperature Sensor
Connector 9: HVAC Control Module C1
Connector 10: HVAC Control Module C2
Connector 11: HVAC Control Module C3
Connector 12: Mode Actuator
Connector 13: Outside Air Temperature Sensor
Connector 14: Recirculation Actuator

A/C Compressor Clutch


Object Number: 537107  Size: CH

Connector Part Information

  • OEM: 12052644
  • Service: See Catalog
  • Description: 2-Way F Metri-Pack 150 Series, Sealed (GY)

Terminal Part Information

  • Terminal/Tray: 12048074/2
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

A/C Compressor Clutch

Pin

Wire Color

Circuit No.

Function

A

BK

250

Ground

B

D-GN

59

A/C Compressor Clutch Supply Voltage

A/C Refrigerant Pressure Sensor


Object Number: 1519475  Size: CH

Connector Part Information

  • OEM: 15477863
  • Service: 88988301
  • Description: 3-Way F GT 150 Series, Sealed (BK)

Terminal Part Information

  • Terminal/Tray: 15326267/19
  • Core/Insulation Crimp: E/4
  • Release Tool/Test Probe: 15315247/J-35616-2A (GY)

A/C Refrigerant Pressure Sensor

Pin

Wire Color

Circuit No.

Function

1

BK/WH

2751

Low Reference (LE5)

TN

5514

Low Reference (LNF)

2

GY

2700

5-Volt Reference 2

3

OG/BK

380

A/C Refrigerant Pressure Sensor Signal

Air Temperature Actuator - Left


Object Number: 258172  Size: CH

Connector Part Information

  • OEM: 12064982
  • Service: 12102633
  • Description: 5-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Air Temperature Actuator - Left

Pin

Wire Color

Circuit No.

Function

1

YE

1791

Low Reference

2

L-BU

733

Air Temperature Door Position Signal

3

L-BU/BK

1688

5-Volt Reference

4

D-BU

1199

Air Temperature Door Control

5

TN/BK

1647

Recirculation Door Control B

Air Temperature Actuator - Right


Object Number: 258172  Size: CH

Connector Part Information

  • OEM: 12064982
  • Service: 12102633
  • Description: 5-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Air Temperature Actuator - Right

Pin

Wire Color

Circuit No.

Function

1

YE

1791

Low Reference

2

D-BU

1646

Auxiliary Air Temperature Door Position Signal

3

L-BU/BK

1688

5-Volt Reference

4

TN/BK

1647

Recirculation Door Control B

5

TN

2273

Mode Door Control

Blower Motor


Object Number: 1658766  Size: CH

Connector Part Information

  • OEM: 7283-5590-40
  • Service: 88988702
  • Description: 2-Way F 6.3 Series (GY)

Terminal Part Information

  • Terminal/Tray: 7116-4122-02/10
  • Core/Insulation Crimp: A/B
  • Release Tool/Test Probe: 12094430/J-35616-42 (RD)

Blower Motor

Pin

Wire Color

Circuit No.

Function

1

OG

52

Blower Motor High Control

2

BN

141

Ignition 3 Voltage

Blower Motor High Speed Relay


Object Number: 281199  Size: CH

Connector Part Information

  • OEM: 12034003
  • Service: 88987189
  • Description: 5-Way F Metri-Pack 630 Series (BK)

Terminal Part Information

  • Pins: 1, 2, 4
  • Terminal/Tray: 12084590/3
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12094430/J-35616-42 (RD)
  • Pins: 5
  • Terminal/Tray: 12015869/3
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12094430/J-35616-42 (RD)

Blower Motor High Speed Relay

Pin

Wire Color

Circuit No.

Function

1

BK

2050

Ground

2

BN

141

Ignition 3 Voltage

3

--

--

Not Used

4

OG

52

Blower Motor High Control

5

OG

52

Blower Motor High Control

Blower Motor Resistor Assembly


Object Number: 62451  Size: CH

Connector Part Information

  • OEM: 12059296
  • Service: 12059296
  • Description: 5-Way F Metri-Pack 480 Series (RD)

Terminal Part Information

  • Pins: A, E
  • Terminal/Tray: 12084595/2
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: 12094430/J-35616-40 (BU)
  • Pins: B-D
  • Terminal/Tray: 12124304/2
  • Core/Insulation Crimp: A/B
  • Release Tool/Test Probe: 12094430/J-35616-40 (BU)

Blower Motor Resistor Assembly

Pin

Wire Color

Circuit No.

Function

A

OG

52

Blower Motor High Control

B

YE

60

Blower Motor Low Control

C

TN

63

Blower Motor Medium 1 Control

D

L-BU

72

Medium 2 Blower Motor Control

E

OG

52

Blower Motor High Control

Evaporator Temperature Sensor


Object Number: 82383  Size: CH

Connector Part Information

  • OEM: 12047662
  • Service: 12085535
  • Description: 2-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12064971/5
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Evaporator Temperature Sensor

Pin

Wire Color

Circuit No.

Function

A

YE

1791

Low Reference

B

GY

6137

EVAP Core Temperature Sensor Signal

HVAC Control Module C1


Object Number: 1567536  Size: CH

Connector Part Information

  • OEM: 1534390-1
  • Service: 88988350
  • Description: 5-Way F Power Timer Series (BK)

Terminal Part Information

  • Pins: 1, 5
  • Terminal/Tray: 964328-1/25
  • Core/Insulation Crimp: 4/B
  • Release Tool/Test Probe: 12093647/J-35616-40 (BU)
  • Pins: 2-4
  • Terminal/Tray: 927837-1/25
  • Core/Insulation Crimp: C/A
  • Release Tool/Test Probe: 12093647/J-35616-40 (BU)

HVAC Control Module C1

Pin

Wire Color

Circuit No.

Function

1

OG

52

Blower Motor High Control

2

L-BU

72

Medium 2 Blower Motor Control

3

TN

63

Blower Motor Medium Control (1)

4

YE

60

Blower Motor Low Control

5

BK

550

Ground

HVAC Control Module C2


Object Number: 684939  Size: CH

Connector Part Information

  • OEM: 15336594
  • Service: 15336594
  • Description: 12-Way F Micro-Pack 100 Series (GY)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

HVAC Control Module C2

Pin

Wire Color

Circuit No.

Function

A

--

--

Not Used

B

RD/WH

1540

Battery Positive Voltage

C

BK

550

Ground

D

GY

8

Instrument Panel Lamp Supply Voltage

E

--

--

Not Used

F

WH

193

Rear Defog Relay Control

G

D-GN/WH

762

A/C Request Signal

H

--

--

Not Used

J

L-BU

292

Rear Defog Switch Signal

K

PK

339

Ignition 1 Voltage

L

BK/WH

651

Ground

M

--

--

Not Used

HVAC Control Module C3


Object Number: 73151  Size: CH

Connector Part Information

  • OEM: 12064799
  • Service: 15305996
  • Description: 12-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

HVAC Control Module C3

Pin

Wire Color

Circuit No.

Function

A

YE

1791

Low Reference

B

L-GN/BK

2276

Defrost Door Position Signal

C

GY

6137

Evaporator Core Temperature Sensor Signal

D

D-BU

1646

Auxiliary Air Temperature Door Position Signal

E

L-BU

733

Air Temperature Door Position Signal

F

L-BU/BK

1688

5-Volt Reference

G

D-GN

1614

Recirculation Door Control

H

TN/BK

2274

Recirculation Door Control Circuit

J

L-GN

2275

Mode Door Position Signal

K

TN

2273

Mode Door Control

L

L-GN/BK

1647

Recirculation Door Control B

M

D-BU

1199

Air Temperature Door Control

Mode Actuator


Object Number: 258172  Size: CH

Connector Part Information

  • OEM: 12064982
  • Service: 12102633
  • Description: 5-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Mode Actuator

Pin

Wire Color

Circuit No.

Function

1

YE

1791

Low Reference

2

L-GN/BK

2276

Defrost Door Position Signal

3

L-BU/BK

1688

5-Volt Reference

4

TN

2273

Mode Door Control

5

L-GN

2275

Mode Door Position Signal

Outside Air Temperature Sensor


Object Number: 684793  Size: CH

Connector Part Information

  • OEM: 12052642
  • Service: 12101856
  • Description: 2-Way F Metri-Pack 150 Series, Sealed (L-GN)

Terminal Part Information

  • Terminal/Tray: 12048074/2
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12094429/J-35616-2A (GY)

Outside Air Temperature Sensor

Pin

Wire Color

Circuit No.

Function

A

D-GN/WH

636

Ambient Air Temperature Signal

B

YE

61

Low Reference

Recirculation Actuator


Object Number: 258172  Size: CH

Connector Part Information

  • OEM: 12064982
  • Service: 12102633
  • Description: 5-Way F Micro-Pack 100 Series (BK)

Terminal Part Information

  • Terminal/Tray: 12146447/3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Recirculation Actuator

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Used

4

L-BU

1614

Recirculation Door Control

5

L-GN

2274

Recirculation Door Control Circuit