Isuzu N-Series. Manual - part 992

CAB AND CHASSIS ELECTRICAL 8-73

H-5

H-7, H-8

Starter Switch

Refer to “START AND CHARGING” in this section.

Glow Indicator Light Thermo Switch

Refer to “METER AND WARNING/INDICATOR LIGHT”
in this section.

X-26

P-1

P-4

P-2

P-3

P-5

H-14 

(4J 

type 

ENGIN

E)

(Excep

t 4JH1)

H-14 

(4J 

type 

ENGIN

E)

(Excep

t 4JH1)

No.

Connector Face

005-006

000-004

000-004

000-006

000-006

000-002

016-001

1

2

3

4

5

6

7

8

9

10 11 12

13 14 15 16

016-002

4

3

2

1

8

7

6

5

12 11 10

9

16 15 14 13

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

1

2

1

2

1 2 3 4

5 6 7 8

9 10 11 12 13

14 15 16 17 18

2

1

2

1

4 3 2 1

8 7 6 5

13 12 11 10 9

18 17 16 15 14

H - 6

H - 7

H - 8

N8A5489E

8-74 CAB AND CHASSIS ELECTRICAL

QOSII Control Unit

Exhaust Brake System

General Description

This circuit consists of starter switch, exhaust brake
switch (combination switch), accelerator switch, clutch
switch, vacuum switching valve, neutral switch and re-
lay.
Exhaust brake is a system to increase exhaust pressure
by means of squeezing exhaust gas from engine and
exert engine brake.
Turn the exhaust brake SW on, and the exhaust brake
valve starts to work by the function of the magnetic valve
to enable the exhaust bake to operate, when the ex-
haust brake indicator light will be on.
When either the accelerator pedal or the clutch pedal is
depressed while driving, the switch of the depressed
pedal will turn off, subsequently the exhaust braking will
stop working.

Terminal No.

Connected to

1

Starter switch (ON)

2

—

3

Thermo  switch

4

Starter switch (ST)

5

Glow relay

6

Ground

7

Glow indicator (Meter)

N8A0079E

CAB AND CHASSIS ELECTRICAL 8-75

Parts Location

NHR55, NKR55

F-2, F-16, F-21

X-8  EXHAUST BRAKE RELAY

B-52 EXHAUST BRAKE INDICATOR LIGHT (METER)

X-11

X-25

B-7

EXHAUST BRAKE

MAGNETIC VALVE

(NHR/NKR55 (T OR TC) ONLY)

(NHR/NKR55 (NIA) only)

N8A0084E

8-76 CAB AND CHASSIS ELECTRICAL

NKR66, NPR66, NQR66

N8A0085E