GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1999 🢒 Isuzu MD Steel Tilt (F Model) 🢒 Body and Accessories 🢒 Horns 🢒 Instrument Panel, Gages, and Console Connector End Views
Table 1: Air Suspension Dump Switch
Table 2: Engine Coolant Temperature Gauge Sensor
Table 3: Engine Oil Pressure Gauge Sender (Isuzu)
Table 4: Engine Coolant Temperature Gauge Connector
Table 5: Exhaust Brake Switch
Table 6: Fuel Sender (Single Fuel Tank)
Table 7: Fuel Sender (Dual Fuel Tank-Left Hand)
Table 8: Fuel Sender (Dual Fuel Tank-Right Hand)
Table 9: Fuel Sender and Transfer Pump Control Module
Table 10: Fuel Transfer Pump
Table 11: Fuel Transfer Pump Relay
Table 12: High Idle Switch
Table 13: Hourmeter
Table 14: IP Harness Connector C1 (15 Way)
Table 15: IP Harness Connector C2 (9 Way)
Table 16: IP Connector C3 (17 Way)
Table 17: IP Harness Connector C4 (7 Way)
Table 18: IP Harness Connector C5 (13 Way)
Table 19: Low Air Pressure Switch
Table 20: Low Coolant Level Indicator Switch
Table 21: Multifunction Switch C1
Table 22: Multifunction Switch C2
Table 23: Park Brake Switch, Daytime Running Lamps (Air Brakes)
Table 24: Speedometer
Table 25: Vehicle Speed Sensor (Automatic Transmission)
Table 26: Vehicle Speed Sensor (Manual)

Air Suspension Dump Switch


Object Number: 231646 Size: CH

Connector Part Information
    • 6 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

PNK

121

Fuse Output-Ignition

2

BLU

122

Air Suspension Dump Valve Solenoid Feed

3-4

--

--

Not Used

5

BRN

123

Illumination

6

BLK/RED

124

Interior lamp Dimming Buss

Engine Coolant Temperature Gauge Sensor


Object Number: 35437 Size: CH

Connector Part Information
    • 12052644
    • 2 Way F Metri-Pack 150 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

GRN

11

Multifunction Alarm Module-Water Temp. (Engine Shutdown)

B

--

--

Not Used

Engine Oil Pressure Gauge Sender (Isuzu)


Object Number: 246685 Size: CH

Connector Part Information
    • 1 Way
    • Female

Pin

Wire Color

Circuit No.

Function

A

BRN/WHT

7

Oil Pressure Switch Signal

Engine Coolant Temperature Gauge Connector


Object Number: 246685 Size: CH

Connector Part Information
    • 1 Way
    • Female

Pin

Wire Color

Circuit No.

Function

A

GRN

4

Engine Coolant Temperature Gauge Sender

Exhaust Brake Switch


Object Number: 237080 Size: CH

Connector Part Information
    • 6 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

PNK

81

Fuse Output-Ignition

2

BLU/YEL

82

Exhaust Brake Switch

3-4

--

--

Not Used

5

BRN

85

Exhaust Brake Relay

6

BRN

86

Exhaust Brake Relay

Fuel Sender (Single Fuel Tank)


Object Number: 38608 Size: CH

Connector Part Information
    • 12162189
    • 4 Way F Metri-Pack 150.2 Series Pull To Seat, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B-C

--

--

Not Used

D

PPL

30

Fuel Gauge Sensor Signal

Fuel Sender (Dual Fuel Tank-Left Hand)


Object Number: 38608 Size: CH

Connector Part Information
    • 12162189
    • 4 Way F Metri-Pack 150.2 Series Pull To Seat, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B-C

--

--

Not Used

D

DK BLU

1936

Fuel Gauge Sensor Signal-Left

Fuel Sender (Dual Fuel Tank-Right Hand)


Object Number: 38608 Size: CH

Connector Part Information
    • 12162189
    • 4 Way F Metri-Pack 150.2 Series Pull To Seat, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B-C

--

--

Not Used

D

DK BLU

1937

Fuel Gauge Sensor Signal-Right

Fuel Sender and Transfer Pump Control Module


Object Number: 73212 Size: CH

Connector Part Information
    • 12059573
    • 6 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PNK

139

Fuse Output-Ignition

B

LT BLU

1937

Fuel Gauge Sensor Signal-Right

C

DK BLU

1936

Fuel Gauge Sensor Signal-Left

D

LT GRN

497

Fuel Pump Relay Output-Coil-Secondary

E

BLK

350

Ground

F

PPL

30

Fuel Gauge Sensor Signal

Fuel Transfer Pump


Object Number: 258174 Size: CH

Connector Part Information
    • 12010973
    • 2 Way M Weather Pack (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B

GRY

120

Fuel Pump, Motor Feed

Fuel Transfer Pump Relay


Object Number: 39670 Size: CH

Connector Part Information
    • 12129716
    • 4 Way F Metri-Pack 280 Series, Flexlock, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

30

PNK

139

Fuse Output-Ignition

85

PNK

139

Fuse Output-Ignition

86

LT GRN

497

Fuel Pump Relay Output-Coil-Secondary

87

GRY

120

Fuel Pump Motor Feed

High Idle Switch


Object Number: 378928 Size: CH

Connector Part Information
    • 6 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

PNK/BLK

240

Idle Control Down

2

RED

238

Fuse Output-Ignition

3

PNK/GRN

239

Idle Control Up

4-6

--

--

Not Used

Hourmeter


Object Number: 222755 Size: CH

Connector Part Information
    • 12045813
    • ASM 4F M/P 150 (NAT)

Pin

Wire Color

Circuit No.

Function

A

YEL

37

Generator

B

--

--

Not Used

C

BLK

330

Ground

D

--

--

Not Used

IP Harness Connector C1 (15 Way)


Object Number: 236545 Size: CH

Connector Part Information
    • 15 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

BRN

6

Generator Indicator Lamp

2

BLK/WHT

90

Exhaust Brake Indicator Lamp

3

BLK

91

Exhaust Brake Indicator Lamp

4

GRY

7

Do Not Shift Indicator Lamp

5

BLU

12

Park Brake Indicator Lamp

6

BRN

1

Fused Output Ignition

7

BRN

58

Daytime Running Lights Indicator Lamp

8

LT GRN

38

ABS Indicator Lamp

9

BLK

4

Ground

10

BRN/WHT

36

Service Engine Soon Indicator Lamp

11

BLK/WHT

13

Service Parking Brake Indicator Lamp

12

LT GRN

11

Apply Parking Brake Indicator Lamp

13

BLU

18

Left Turn Signal Indicator Lamp

14

RED/YEL

14

High Beam Indicator Lamp

15

BLU

59

Daytime Running Lights Indicator Lamp

IP Harness Connector C2 (9 Way)


Object Number: 236605 Size: CH

Connector Part Information
    • 9 Way F
    • (BLK)

Pin

Wire Color

Circuit No.

Function

1

BRN

8

Charge Indicator Lamp

2

--

--

Not Used

3

LT BLU

17

Right Turn Signal Indicator Lamp

4

YEL/BLK

10

Aux Brake Indicator Lamp

5

YEL/RED

15

Low Coolant Indicator Lamp

6

BRN

28

Tachometer Ignition

7

--

--

Not Used

8

BLU/YEL

19

Check Gauges Indicator Lamp

9

BRN/WHT

9

Primary Brake Indicator Lamp

IP Connector C3 (17 Way)


Object Number: 236600 Size: CH

Connector Part Information
    • 17 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

BRN

2

Illumination

2

BLK/RED

3

Rheostat

3

BRN

33

Check Gauge Logic (6H)

4

BRN/BLK

34

Check Gauge Logic (6H)

5

BLU/YEL

20

Check Gauge Logic (Gas)

6

BLK

31

Tachometer (Ground)

7-9

--

--

Not Used

10

PPL

24

Fuel Gauge Input

11

BRN/WHT

211

Oil Pressure Gauge

12

BRN

21

Fused Input Ignition

13

BLK

27

Voltmeter (-)

14

BRN

26

Voltmeter (+)

15

BLK

22

Meter Ground

16

GRN

23

Water Temperature

17

WHT

30

Tachometer Signal

IP Harness Connector C4 (7 Way)


Object Number: 236724 Size: CH

Connector Part Information
    • 7 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

BRN

70

Fused Output Ignition

2

PPL

63

Differential Lock Panel Lamp

3

BLK

69

Ground Bus

4-7

--

--

Not Used

IP Harness Connector C5 (13 Way)


Object Number: 235963 Size: CH

Connector Part Information
    • 13 Way F
    • (GRN)

Pin

Wire Color

Circuit No.

Function

1-6

--

--

Not Used

7

BLU

65

Air Suspension Dump Switch

8

BLK

68

Air Suspension Dump Switch

9-13

--

--

Not Used

Low Air Pressure Switch


Object Number: 236406 Size: CH

Connector Part Information
    • 12065400
    • 2 Way F Metri-Pack 150 Series, Sealed (GRN)

Pin

Wire Color

Circuit No.

Function

A

TAN/WHT

33

Brake Warning Indicator Lamp Output

B

BLK

150

Ground

Low Coolant Level Indicator Switch


Object Number: 236598 Size: CH

Connector Part Information
    • 12052641
    • ASM 2F M/P 150 (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1478

Low Coolant Sensor Signal

B

BLK

150

Ground

Multifunction Switch C1


Object Number: 339165 Size: CH

Connector Part Information
    • 22 Way
    • Female

Pin

Wire Color

Circuit No.

Function

1

BLK

87

Ground

2

GRN/WHT

85

Taillamps Relay (Relay Center 1)

3

RED/YEL

721

Lighting (Hi, Low) Relay (Relay Center 1)

4

RED/BLK

717

Lighting Relay (Relay Center 1)

5

BLK

86

Ground

6

BLU/BLK

132

Hazard Flasher (Pin-7)

7

BLU/ORN

133

Hazard Flasher (Pin-8)

8-9

--

--

Not Used

10

GRN/RED

170

Horn Relay (Relay Center 2)

11

BRN

83

IP Cluster C1 (Battery)

12

BLU/ORN

453

Washer Pump

13

ORN

84

Fuse Output-Battery

14

RED/BLK

152

Diode (Dome Lamp)

15-22

--

--

Not Used

Multifunction Switch C2


Object Number: 339175 Size: CH

Connector Part Information
    • 9 Way
    • Female

Pin

Wire Color

Circuit No.

Function

22

--

--

Not Used

23

BRN/WHT

459

Windshield Wiper Motor (Pin-5)

24

BRN/YEL

458

Windshield Wiper Motor (Pin-4)

25

BLK

461

Ground

26

BLU/WHT

457

Windshield Wiper Motor (Pin-2)

27-30

--

--

Not Used

Park Brake Switch, Daytime Running Lamps (Air Brakes)


Object Number: 246698 Size: CH

Connector Part Information
    • 2 Way M
    • (GRY)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

744

Daytime Running Lamps (DRL) Off Relay Air Brake

B

BLK

746

Park Brake Switch Air Brake

Speedometer


Object Number: 236599 Size: CH

Connector Part Information
    • 5 Way
    • Female

Pin

Wire Color

Circuit No.

Function

A

BLK/RED

40

Interior Lamp Dimming Buss

B

BRN

41

Ignition

C

BRN

44

Illumination

D

WHT

42

Speed Signal

E

BLK

43

Ground

Vehicle Speed Sensor (Automatic Transmission)


Object Number: 35437 Size: CH

Connector Part Information
    • 12052644
    • ASM 2F M/P 150 (LT GRY)

Pin

Wire Color

Circuit No.

Function

A

PPL/WHT

821

Vehicle Speed Sensor Signal

B

LT GRN/BLK

822

Vehicle Speed Sensor Return

Vehicle Speed Sensor (Manual)


Object Number: 40389 Size: CF

Connector Part Information
    • 3 Way F
    • (GRN)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

24

Vehicle Speed Sensor Signal

B

PPL/WHT

25

Vehicle Speed Sensor Return

C

PNK

26

Fuse Output-Ignition