ISUZU TROOPER 1998 Service Repair Manual

8DÐ128 WIRING SYSTEM
Circuit Diagram (RHD)-1
5.0
W
0.85
GR0.85
GR3.0
W3.0
W
3.0
Y/RFL-1 80A
MAIN
F-8 20A
FRT FOG
FOG LIGHT
RELAYFOG
LIGHT
SWLIGHTING
RELAY
F-4 15A
H/LAMP-LHF-5 15A
H/LAMP-RH BATT.(+)
TAIL
RELAY(4)
ILLUMINATION
CONTROLLER
(3)
1.25
V4
15
X-23A2X-23
0.85
R/L
B 0.5
B0.5
B
1.25
B
0.5
B 0.85
G 0.85
G
0.5
B0.3
R/G
3
7
X-235I-5
3
I-5
2
I-5
H-41
C-39
FENDER
-RH13
H-16 1
X-231H-16
5
H-26 4
I-56
I-5
0.85
R/L 0.85
R/L0.85
LG/R
0.3
V/R0.3
V/R0.5
V/R
0.3
V/R 3.0
R/B3
4
X-1
5
X-1
C
D
H-41
E4
H-15 1
X-14
X-1F
B-19
BODY
-RH
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WIRING SYSTEM 8DÐ129
Circuit Diagram (RHD)-2
A
B
C
C-24
FOG
LIGHT
-LHHEAD
LIGHT
-LHHEAD
LIGHT
-RH
LIGHTING
SW
DIMMER·PASSING
SW
(COMBINATION
SW)
1.25
V
1.25
V
0.5
B0.5
B
FOG
LIGHT
-RHHIGH
BEAM
INIDI-
CATOR
(METER)
1
2
C-29
0.85
R/L
0.85
R/Y 0.85
R/Y0.85
R/L
1.25
R/Y
1.25
R/Y
1.25
R/Y0.3
V/R
0.5
B 0.3
V/R
1.25
B
BODY-RH LOW HIGHPASS
H-1510
H-1316
H-4113
H-99
H-4116
14
I-10
I-10
1 C-21
212 C-21
13
B-12
15
B-1214 15
C-213
1
2 C-24 C-29
5
C-16
FENDER-LH
D
E
F
0.85
LG/R
0.85
Y
0.85
Y 0.85
Y
0.85
Y1.25
R/Y
C-32
C-32
C-323
B-12
16
B-12
7
B-19
1
B-12
B-12
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8DÐ130 WIRING SYSTEM
Parts Location (RHD)
Legend
(1) Battery
(2) Relay and Fuse Box (X-1, X-23)
(3) C-39
(4) H-13, H-15, H-16, H-26
(5) B-19
(6) I-5
(7) I-10(8) B-12
(9) H-9
(10) C-16
(11) C-21
(12) C-24
(13) C-29
(14) H-41, H-42
(15) C-32
4
1
13 1426
9
11
128
5
7
3
15
10
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WIRING SYSTEM 8DÐ131
Circuit Diagram (LHD)-1
5.0
W
0.85
GR0.85
GR3.0
W3.0
W
3.0
Y/RFL-1 80A
MAIN
F-8 20A
FRT FOG
FOG LIGHT
RELAYFOG
LIGHT
SW
DIMMER
RELAYLIGHTING
RELAY
BATT.(+)
TAIL
RELAY(4)
ILLUMINATION
CONTROLLER
(3)
1.25
V4
15X-23A2X-23
B 0.5
B0.5
B
1.25
B
0.5
B 0.85
G 0.85
G
0.5
B0.3
R/G
3
7
X-235I-5
3
I-5
2
I-5
H-41
C-39
FENDER
-RH2
X-3
3
X-3
5
X-3
1
X-231H-16
5
H-26 4
I-56
I-5
2.0
Y/G
F-4 10A
H/LAMP-LH
(HI)F-5 10A
H/LAMP-RH
(HI)
F-7 10A
H/LAMP-RH
(LOW) F-6 10A
H/LAMP-LH
(LOW)2.0
Y/R
0.85
Y0.85
R/Y 0.85
R/G0.85
R/L 0.5
R0.5
V/R 3.0
R/B
1.25
R/B 3X-1
5
X-1
D
C
E
F
4
H-12 1
X-1
4
X-3 1
X-34
X-1G
B-19
BODY
-RH
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8DÐ132 WIRING SYSTEM
AC-24
FOG
LIGHT
-LHHEAD
LIGHT
-LH
LIGHTING
SW DIMMER/
PASSING
SW
1.25
V
1.25
V
0.5
B0.5
B
FOG
LIGHT
-RHHIGH
BEAM
INIDI-
CATOR
(METER)
1
2
C-290.5
V/R
0.3
V/R0.5
V/R
0.5
B
1.25
B LOW HIGHPASS
H-1510
15
B-1214 1
2 C-24 C-29
5
C-16
FENDER-LH
1
C-39
4
C-39
4
C-39
8
C-39
10 4
H-16
B
C
G
0.85
Y 0.85
Y
0.85
R/Y 0.85
R/Y
(4JG2) (4JG2)
(4JG2)
(4JG2) 0.85
B0.85
B
0.85
B0.85
B
FENDER-RH FENDER-RH FENDER-RH BODY-LH0.5
B0.5
B 3
C-21H-41
C-211
2
B-12
16
B-12
7
B-19
1
B-12
B-12 C-21
H-4116
13
H-41
HEAD
LIGHT
-RH
7
C-39
D
E
F
0.85
R/G0.85
R/L0.5
R
0.85
B3
C-32
C-321
2
C-32
H-4114
12
H-41110.5
R/Y
0.85
R/Y
0.85
R/L
15
I-10
I-10H-16
14
3
H-411.25
R
D08RW804
Circuit Diagram (LHD)-2

WIRING SYSTEM 8DÐ133
Parts Location (LHD)
Legend
(1) I-10
(2) B-12
(3) I-5
(4) H-26
(5) B-19
(6) C-16
(7) C-21(8) C-24
(9) C-29
(10) H-41, H-42
(11) C-32
(12) Relay and Fuse Box (X-1, X-3, X-23)
(13) C-39
(14) H-12, H-15, H-16
234
5
6
7
8 9 10111214
13
1
D08RW806

8DÐ134 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
1. Headlight (RHD)
Check point
Trouble modeFuse
F–4
(15A)F–5
(15A)Lighting
relayLighting
SWDimmer•
Passing
SWCable
harness Headlight
bulb
1–1. Both Headlights inoperative
1–2. Headlight on the left (or
right) side inoperative
1–3. Both headlights in
low-beam inoperative
1–4. Headlight low-beam on
the left (or right) side
inoperative
1–5. Both headlights in
high–beam inoperative
1–6. Headlight high-beam on the
left (or right) side
inoperative
1–7. Headlight beam does not
change
LH RH
1–8. Headlights remain on when
the lighting SW is turned off
1–9. Headlights come on with
the lighting SW at the
clearance light position
1–10. Passing lights inoperative

WIRING SYSTEM 8DÐ135
Check point
Trouble modeFuse
F–4
(10A)F–5
(10A)Dimmer
relayLighting
SWDimmer•
Passing
SWCable
harness Headlight
bulb
2–1. Both Headlights
inoperative
2–2. Headlight on the
left (or right) side
inoperative
2–3. Both headlights
in low-beam
inoperative
2–4. Headlight low-
beam on the left
(or right)
side inoperative
2–5. Both headlights
in high-beam
inoperative
2–6. Headlight
high-beam on
the left (or right)
side inoperative
2–7. Headlight beam
does not change
Lighting
relayF–6
(10A)F–7
(10A)
2–8. Headlights
remain
on when the
lighting SW is
turned off
2–9. Headlights come
on with the
lighting SW at
the clearance
light position
Diode
2–10. Passing lights
inoperative
LH
RH
2. Headlight (LHD)

8DÐ136 WIRING SYSTEM
Check point
Trouble modeFuse
F–8
(15A or 20A)Cable
harness Fog light
bulb
3–1. Both FRT fog lights
inoperative
(while the clearance light is ON)
3–2. FRT fog light on the left
(or rigth) side inoperative
(while the clearance light is ON)
LHRH
FRT
fog light
SWFRT
fog light
relayRR
fog light
SWRR
fog light
relay
3. FRT fog lights

WIRING SYSTEM 8DÐ137
1-1. Both Headlights Inoperative
·IS THE LIGHTING RELAY NORMAL?
YES
·IS B-19 GROUNDED SECURELY?
YES
REPLACE THE LIGTHING RELAY
NO
·DISCONNECT THE LIGTHING SW CONNECTOR
·IS THE BATTERY VOLTAGE APPLIED BETWEEN THE HARNESS
SIDE CONNECTOR 1 B-12 AND GROUND?
YES
GROUND IT SECURELY
NO
·REMOVE THE LIGHTING SW
·IS THERE CONTINUITY BETWEEN 1 B-12 AND 7 B-12 WHEN
SETTING THE LIGHTING SW AT THE HEADLIGHT POSITION ?REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSUBLE LINK
FL-1 (80A) AND 1 B-12
NO
YES
REPAIR OR REPLACE THE LIGHTING SW
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN THE HARNESS SIDE CONNECTOR
7 B-12 AND B-19
·IS THE DIODE NORMAL?
REPLACE THE DIODE
NOYES