Isuzu N-Series. Manual - part 1101

8-116 CAB AND CHASSIS ELECTRICAL

4HK1-TC Engine (12)

121

1

1

1

2

2

WHT

ECM

ECM

11

6

2

RED

2

WHT

0.75

WHT

0.75

GRN

0.75

GRN/

WHT

0.75 WHT

Cylinder #1

Fuel

Injector

Cylinder #4

Fuel

Injector

Cylinder #3

Fuel

Injector

Cylinder #2

Fuel

Injector

4

4

2

1

2

WHT

0.75

WHT

0.75

BLK

0.75

WHT/

YEL

3

3

1

33

3

2

2

RED

0.75

RED

0.75

YEL

0.75

BLK/

BLU

0.75 RED

2

2

H-125

H-126

2

3

E-138

E-141

E-140

E-139

11

8

1

E-141

E-138

E-140

E-139

2

RED

0.75

RED

0.75

BLU

0.75

BLK

6

6

H-126

H-125

120

7

7

11

7

8

8

11

9

5

5

Cylinder #1

fuel

injector

control

Cylinder #4

fuel

injector

control

Cylinder #3

fuel

injector

control

Cylinder #2

fuel

injector

control

Charge voltage

(Common 1)

Charge voltage

(Common 2)

N6A6638E

CAB AND CHASSIS ELECTRICAL 8-117

4HK1-TC Engine (13)

0.5

PNK

0.5

GRN/

ORN

ECM

0.85

GRN/

ORN

0.5

BLU/

ORN

0.5

BLU/

ORN

0.85GRN/ORN

Refrigerator

Compressor

J-6

0.85

GRN/

WHT

0.85

GRN/

WHT

Thermo A/C 

Relay

2

H-5

9

H-105

8

H-4

1

1

J-7

J-6

2

E-5

1

1

J-191

34

44

33

0.75

WHT/

RED

A/C

Pressure

Switch

A/C

Compressor

1

H-120

Glow

Plug

3

BLK/

YEL

3

BLK/

YEL

3

BLK/

BLU

F-9

ENG. (IG)

10A

0.5

BLK/

RED

0.5

YEL/

BLK

0.5 YEL/BLK

0.5

YEL/

BLU

E-3

Ignition Switch

5

2

4

X-20

X-20

3

H-5

18

10

B-84

B-84

1

2

PT

O

Switch

A/C

signal

Refrigerator

switch

signal

Glow plug

relay

control

SBF-3

GLOW

60A

Fuse &

Relay Box

(Glove Box)

Fuse &

Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Behind the Cab)

PTO

switch

signal

0.5

BLK

1.25

BLK

B-1

Frame

W/S-C

+B

N6A6639E

ECM

Glow

Relay

8-118 CAB AND CHASSIS ELECTRICAL

4HK1-TC Engine (14)

F-28

ECM

10A

Fuse &

Relay Box

(Glove Box)

Fuse &

Relay Box

(Behind the Cab)

6

45

H-5

17

H-4

0.5

LT GRN/

RED

0.5

BRN/

BLK

0.5

LT GRN/

RED

2

102

H-105

0.5

LT GRN/

WHT

50

Neutral

Switch

0.5

LT GRN

0.5

LT GRN

0.5

LT GRN

0.5

LT GRN/

WHT

0.85

LT GRN

0.5

BLK/

BLU

15

J-191

E-111

0.5

BLK

ECM

Intake

throttle

solenoid

valve

control

Exhaust

brake

solenoid

valve

control

Neutral

switch

signal

Exhaust

brake

switch

signal

F-9

ENG. (IG)

10A

0.5

YEL/

BLU

0.5

BRN/

YEL

Clutch

Switch

0.5

BRN/

YEL

Ignition Switch

47

Clutch

switch

signal

1

2

5

4

J/C-2

2

1

J-40

J-40

2

1

J-31

J-31

1

2

J-50

J-50

2

5

B-69

B-69

2

1

B-89

B-89

Intake

Throttle

Solenoid

Valve

Exhaust

Brake

Solenoid

Valve

N6A6640E

TCM

0.5

L

T

 GRN/

BLU

0.5

BLK

3

BLK

0.5

BLK

1.25

BLK

0.5

L

T

 GRN

/BLU

0.5

L

T

 GRN

/BLU

0.5

BRN/

BLK

0.85

L

T

 GRN/

RED

0.85

L

T

 GRN/

RED

0.5

L

T

 GRN/

RED

0.5

L

T

 GRN/

BLU

B-1

Frame

B-7

H/L

Bracket

F-2

FUEL

HEA

TER

10A

Heater Relay

F-7

T

AIL

LIGHT

10A

T

ail Relay

5

Engine

W

arm up

Switch

2

6

3

41

B-31

B-31

7

51

H-4

Engine

warm up

switch

signal

W/S-F

W/S-C

4

9

J/C-D

11

5

J/C-B

Exhaust

Brake

Switch

(Combination

Switch)

CAB AND CHASSIS ELECTRICAL 8-119

4HK1-TC Engine (15)

2

1

B-431

7

8

H-8

B-387

Resistor 1

2

1

1

2

TCM

3

2

B-427

10

5

H-15

14

9

15

14

J-177

27

26

5

6

H-8

0.5
BLU/
WHT

0.5

BLU

0.5

BLU

/

WHT

0.5
BLU

0.5

BLU

0.5
BLU/
WHT

0.5

BLU

0.5
BLU/
WHT

0.5

BLU

0.5
BLU/
WHT

0.5

BLU

0.5
BLU/
WHT

0.5

BLU

0.5
BLU/
WHT

0.5

BLU

0.5
BLU/
WHT

0.5
BLU/WHT

0.5 BLU

0.5
BLU/WHT

0.5 BLU

0.5
BLU/WHT

0.5 BLU

0.5
BLU/WHT

0.5 BLU

0.5
BLU/WHT

0.5 BLU

0.5
BLU/WHT

0.5 BLU

0.5
BLU/WHT

0.5 BLU

EHCU

37

18

J-191

CAN
high

CAN
low

CAN
high

CAN
low

DRM

ECM

Resistor 2

CAN
high

CAN
low

3

J/C-F

4

5

6

J/C-F

Without  ABS

2

1

3

             J/C-R 

5

4

6

J/C-R

CAN
high

CAN
low

N6A6641E