Isuzu Trooper (1998-2002 year). Service manual — part 897

8D–122

WIRING SYSTEM

DROPPING

RESIST

OR

GLOW

PLUG

GLOW

RELA

Y

-2

QOS/EGR CONTROL

UNIT

GLOW

RELA

Y

-1

C-66

6

H-42

16

1

1

C-60

C-59

3.0

R/W

3.0

B/Y

3.0

B/R

0.5

B/G

0.5

B/G

0.85

B/Y

FL-5 50A

GLOW

C-53

1

C-59

2

1

C-54

BA

TT

.(+)

C-55

1

2

C-55

A

C-66

7

H-41

7

3.0

B/R

0.5

B/L

0.5

B/L

0.85

B/Y

0.85

B/Y

3.0

R/W

C-51

1

C-51

C-52

1

2

2

C-52

VSV

;

EVR

V

B

C-66

10

0.5

R

0.85

B/Y

0.85

B/Y

C-72

1

2

C-72

VSV

;

EGR

C-66

4

0.5

G

0.85

B/Y

C-73

1

2

C-73

D08RW985

Circuit Diagram (LHD)-2

WIRING SYSTEM

8D–123

12

E-41

E-41

QOS THERMO

SENSOR

(ENGINE)

T

ACHO

SENSOR

(INJECTION

PUMP)

QOS/EGR CONTROL

UNIT

C-16

0.5

B

0.5

B/P

0.5

B/P

0.5

B/P

0.5

B/P

0.5

B/R

0.5

B/R

0.5

R/G

0.5

R/G

0.5

R/W

0.5

R/W

0.5

Y/G

0.5

Y

0.5

Y/L

0.5

Y

0.5

B/Y

0.5

B

8

C-66

3

FENDER

-LH

C-39

7

4

FENDER

-RH

H-41

1

E-36

10

H-4

C-66

14

C-66

15

E-36

2

H-4

6

C-66

2

C-66

1

C-66

12

C-66

11

C-66

13

2

THROTTLE POSITION

SENSOR

(INJECTION PUMP)

H-4

9

1

H-4

1

3

H-4

E-5

E-5

E-5

5

H-4

8

H-4

12

D08RW986

Circuit Diagram (LHD)-3

8D–124

WIRING SYSTEM

Parts Location (LHD)

Legend

(1) C-60
(2) QOS/EGR Control Unit (C-66)
(3) I-9
(4) H-8, H-24, H-25, H-26
(5) C-16
(6) Fuse Box
(7) Glow Plug

×

4

(8) C-72
(9) C-73

(10) H-4, H-5
(11) E-36
(12) E-5

(13) C-74
(14) E-41
(15) E-40
(16) Dropping Resister
(17) C-59
(18) H-41, H-42
(19) H-3
(20) Relay and Fuse Box (X-17)
(21) Glow Relay-1 (C-51, C-52)
(22) Glow Relay-2 (C-53, C-54, C-55)
(23) C-39
(24) H-13, H-16

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

D08RWA25

WIRING SYSTEM

8D–125

Headlight and Fog Light

General Description

The circuit consists of the headlight, FRT fog light,
lighting SW, dimmer•passing SW, FRT fog light SW,
high beam indicator, tail relay, lighting relay, FRT
fog light relay and dimmer relay (LHD).
When the lighting SW is turned on by setting it at
headlight position, the lighting relay is activated to
turn on the headlight. The optical axis of the
headlight can be turned up or down by operating the
dimmer SW while the headlight is on.
The passing SW is independent of the lighting SW,
and the optical axis of the passing light can be

turned up only while the switch lever is pulled up
and held in this state.
FRT fog lights turn on when the lighting SW is at
clearance light or headlight position.