GM Service Manual Online
For 1990-2009 cars only
Table 1: A/C Condenser Fan Motor
Table 2: A/C Refrigerant Pressure Switch
Table 3: A/C Temperature Switch
Table 4: Blower Motor (w/ A/C)
Table 5: Blower Motor Resistor (w/ A/C)
Table 6: Evaporator Temperature Sensor
Table 7: HVAC Air Temperature Actuator (w/ A/C)
Table 8: HVAC Control Module C1
Table 9: HVAC Control Module C2
Table 10: HVAC Connector C3 (w/ A/C)
Table 11: HVAC Mode Door Actuator
Table 12: HVAC Recirculating/Fresh Air Actuator

A/C Condenser Fan Motor


Object Number: 240166  Size: CH

Connector Part Information

    • 12162890
    • ASM 2F (Black)

Pin

Wire Color

Circuit No.

Function

5

DK GRN

59

A/C Compressor Clutch Supply Voltage

6

BLK

150

Ground

A/C Refrigerant Pressure Switch


Object Number: 240167  Size: CH

Connector Part Information

    • 12162929
    • ASM 4F 090 SLD (Natural)

Pin

Wire Color

Circuit No.

Function

1

DK GRN

603

A/C Refrigerant Low Pressure Cut Out Switch Signal

2

DK GRN/

WHT

1728

A/C Condenser Relay Control

3

LT BLU

203

A/C Request Signal

4

LT GRN/BLK

59

A/C Compressor Clutch Supply Voltage

A/C Temperature Switch


Object Number: 240168  Size: CH

Connector Part Information

    • 3-Way
    • Female

Pin

Wire Color

Circuit No.

Function

A

GRN/RED

18

Thermo Switch

B

GRN/YEL

17

Thermo Switch

C

LT GRN

16

Thermo Switch

Blower Motor (w/ A/C)


Object Number: 239986  Size: CH

Connector Part Information

    • 3-Way
    • Male

Pin

Wire Color

Circuit No.

Function

A

LT GRN

191

Blower Motor

B

BLU/RED

192

Blower Motor Resistor

Blower Motor Resistor (w/ A/C)


Object Number: 240173  Size: CH

Connector Part Information

    • 6-Way
    • Male

Pin

Wire Color

Circuit No.

Function

1

BLU/WHT

196

Fan Low Resistor

2

BLU/RED

193

Blower Motor

3

--

--

Not Used

4

BLU/BLK

195

Fan Middle Low Resistor

5

--

--

Not Used

6

BLU/YEL

194

Fan Middle High Resistor

Evaporator Temperature Sensor


Object Number: 240168  Size: CH

Connector Part Information

    • 3-Way
    • Female

Pin

Wire Color

Circuit No.

Function

A

GRN/RED

18

A/C Compressor Clutch Relay Control

B

GRN/YEL

17

A/C Request Signal

C

LT GRN

16

Battery Positive Voltage

HVAC Air Temperature Actuator (w/ A/C)


Object Number: 240174  Size: CH

Connector Part Information

    • 6-Way
    • Male

Pin

Wire Color

Circuit No.

Function

1

PNK/BLU

231

Temperature Actuator, Temperature 5

2

--

--

Not Used

3

PNK

230

Temperature Actuator, Temperature 4

4

LT GRN

229

Temperature Actuator, Temperature 2

5

PNK/BLK

232

Temperature Actuator, Temperature 3

6

LT GRN/WHT

228

Temperature Actuator, Temperature 1

HVAC Control Module C1


Object Number: 240175  Size: CH

Connector Part Information

    • 16-Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

BLK

186

Ground

3

PNK

187

Temp 4

4

LT GRN/WHT

188

Temp 1

5

BRN/BLU

189

Mode 1

6

BRN/BLK

190

Mode 2

7

BRN/WHT

191

Mode 3

8

BRN

192

Mode 4

9

--

--

Not Used

10

PNK/BLU

194

Temp 5

11

PNK/BLK

195

Temp 3

12

LT GRN

196

Temp 2

13

LT GRN

197

Mode 7

14

LT GRN/

BLK

198

Mode 8

15

--

--

Not Used

16

BRN/YEL

199

Mode 6

HVAC Control Module C2


Object Number: 240177  Size: CH

Connector Part Information

    • 12-Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

BRN/GRN

200

Mode 5

2

PPL/YEL

175

Recirculate ON

3

GRN

177

Condenser Fan Control

4

BLK/RED

173

Rheostat

5

LT GRN

171

Ignition

6

PPL/GRN

176

Recirculate OFF

7

RED/BLU

184

Ground

8

BRN

172

Illumination

9

PPL/WHT

178

Not Used

10

BLK

174

Ground

11-12

--

--

Not Used

HVAC Connector C3 (w/ A/C)


Object Number: 240180  Size: CH

Connector Part Information

    • 6-Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

BLK

179

Ground

2

BLU/WHT

180

Fan Lo

3

BLU/BLK

181

Fan Med Lo

4

BLUE/YEL

182

Fan Med Hi

5

BLU/RED

183

Fan Hi

6

RED/BLU

184

Ground

HVAC Mode Door Actuator


Object Number: 240182  Size: CH

Connector Part Information

    • 9-Way
    • Female

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

224

Mode Actuator Mod 8

B

BRN/GRN

221

Mode Actuator Mode 5

C

BRN/BLK

227

Mode Actuator Mode 2

D

BRN/BLU

226

Mode Actuator Mode 1

E

LT GRN

225

Mode Actuator Mode 7

F

BRN/WHT

223

Mode Actuator Mode 3

G

BRN

222

Mode Actuator Mode 4

H

BRN/YEL

220

Mode Actuator Mode 6

J

BLK

219

Mode Actuator

HVAC Recirculating/Fresh Air Actuator


Object Number: 240183  Size: CH

Connector Part Information

    • 7-Way
    • Female

Pin

Wire Color

Circuit No.

Function

A-C

--

--

Not Used

D

PPL/YEL

233

Recirculate/Fresh Actuator ON

E

LT GRN

236

Blower motor

F

--

--

Not Used

G

PPL/GRN

234

Recirculate/Fresh Actuator OFF

H

PPL/WHT

235

Supply Voltage