Isuzu N-Series. Service manual - part 993

CAB AND CHASSIS ELECTRICAL 8-77

Circuit Diagram

NHR55, NKR55

B

ST

ACC

ON

1

B-67

B-67

H-7

B-7

P-1

P-2

P-5

2

3

FRAME

FL-1  100A
MAIN

2L

FL-2  50A
KEY SW

STARTER SW

3B/Y

HEADLIGHT 
BRACKET (LH)

3W/B

J-9

FRAME-LH 
(CENTER )

3B

3W/L

1

X-8

X-8

X-8

X-8

2

RELAY;

EXHAUST BRAKE

2

H-6

5

4

3W

3W/B

5W

OFF

X-11

X-11

X-11

2

3

X-11

22

H-5

J-50

B-69

B-69

J-50

H-8

X-25

5

X-25

X-25

3

2

X-25

4

B-89

H-8

B-89

B-75

B-75

H-5

J-31

J-31

1

2

EXHAUST BRAKE

MAGNETIC VALVE

J-40

J-40

1

2

F-2

F-21

0.5B

0.5B

2B

2B

VSV; INTAKE THROTTLE

0.5LG

0.5LG

32

1

2

2

1

0.5LG/B

0.5LG/R

CLUTCH SW

ACCEL.SW

0.5B

12

0.5LG/B

RELAY;

EXHAUST BRAKE 

CONTROL

17

0.5LG/R

0.5LG/R

0.5G/B

2

1

5

2

NEUTRAL SW

EXHAUST BRAKE SW

 (COMBINATION SW)

0.5LG

F-16

15A

15A

10A

FUEL HEATER
EXH. BRAKE

GENERATOR

(N*R55)

0.5B/Y

0.5B/Y

METER

3B/Y

0.85W

GENERATOR (L)

0.85W/L

RELAY ; CHARGE

4

5

3B/R

0.5B

0.5W/R

0.85W/R

N8A0086E

8-78 CAB AND CHASSIS ELECTRICAL

NKR66, NPR66, NQR66

B

ST

ACC

ON

1

B-67

B-67

H-7

B-7

P-1

P-2

P-3

P-4

P-5

2

3

FRAME

FL-1  100A
MAIN

2L

FL-2  40A
KEY SW

STARTER SW

3B/Y

HEADLIGHT 
BRACKET (LH)

3W/B

J-9

FRAME-LH 
(CENTER )

3B

3W/L

1

X-8

X-8

X-8

X-8

2

RELAY;

EXHAUST BRAKE

2

H-6

5

4

3W

5W

OFF

X-1

X-1

X-1

2

3

X-1

22

H-5

B-69

B-69

H-8

X-25

5

X-25

X-25

3

2

X-25

4

B-89

H-8

B-89

B-75

B-75

H-5

J-31

J-31

1

2

EXHAUST BRAKE

MAGNETIC VALVE

J-40

J-40

1

2

F-13

0.5B

0.5B

2B

2B

VSV; INTAKE THROTTLE

0.5LG

0.5LG

32

1

2

2

1

0.5LG/B

0.5LG/R

CLUTCH SW

ACCEL.SW

0.5B

12

0.5LG/B

RELAY;

EXHAUST BRAKE 

CONTROL

17

0.5LG/R

0.5LG/R

0.5G/B

2

5

EXHAUST BRAKE SW

 (COMBINATION SW)

0.5LG

F-16

10A

10A

FUEL HEATER
EXH. BRAKE

0.5B/Y

0.5B/Y

METER

0.85W

GENERATOR (L)

0.85W/L

RELAY ; CHARGE

4

5

3B/R

0.5B

0.5W/R

0.85W/R

E-11

E-11

H-14

H-14

1

2

NEUTRAL SW

   

5

10

N8A0381E

CAB AND CHASSIS ELECTRICAL 8-79

Connector List

No.

Connector Face

X-1

X-8

X-11

X-25

B-69

B-69

B-75

B-75

005-006

005-006

005-001

1

3

2

4

5

005-006

008-001

1
5

2
6

3
7

4
8

008-002

1
5

2

3

6

7

4

8

002-022

1 2

002-023

2 1

B-89

B-89

E-11

E-11

J-50

J-50

H-14

H-14

No.

Connector Face

002-009

1

2

002-010

1

2

002-001

1

2

002-002

1

2

002-001

1

2

002-002

1

2

016-003

1

2

3

4

5

6

7

8

9

11 12 13 14

15

16

10

016-004

4

3

2

1

9

8

7

6

5

13 12 11 10

16

15

14

8-80 CAB AND CHASSIS ELECTRICAL

H-5

J-31

J-31

J-40

P-1

(12 V)

P-1

(12 V)

P-2

P-2

P-2

(24 V)

No.

Connector Face

002-011

1

2

002-012

1

2

002-014

1

2

000-003

000-004

000-003

000-004

000-006

P-3

P-1

(24 V)

P-4

P-5

(12 V)

P-5

(24 V)

No.

Connector Face

000-006

000-004

000-004

000-007

000-002

1

2

3

7

8

9

13

14 15

19

20 21

25

26 27

31

32 33

34

35

36

37

4

5

6

10

11 12

16

17 18

22

23 24

28

29 30

38

39 40

6

5

4

12

11 10

18

17 16

24

23 22

30

29 28

40

39 38

3

2

1

9

8

7

15

14 13

21

20 19

27

26 25

33

32 31

34

35

36

37

N8A5488E