ISUZU TROOPER 1998 Service Repair Manual

8DÐ148 WIRING SYSTEM
3-1. Both FRT Fog Lights Inoperative (While The Clearance Light Is On)
·IS 5 C-16 (OR 6 C-16 ) GROUNDED SECURELY?
YES
GROUND IT SECURELY
NO
·
·REMOVE THE FRT FOG LIGHT SWITCH
IS THE CONTINUITY IN THE SWITCH NORMAL?
YES
REPAIR OR REPLACE THE SWITCH
NO
WITH THE LIGHTING SWITCH AT CLEARANCE LIGHT POSITION,
IS THE BATTERY VOLTAGE APPLIED BETWEEN 4 I-5 AND
THE GROUND?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 4 X-9 (OR FUSE F-12)
AND 4 I-5
NO
REMOVE THE FRT FOG LIGHT RELAY
IS THE RELAY NORMAL?·
·
YES
REPAIR OR REPLACE THE RELAY
NO
REINSTALL THE FRT FOG LIGHT SWITCH
WITH THE LIGHTING SWITCH AT CLEARANCE LIGHT
POSITION AND FRT FOG LIGHT SWITCH AT ON POSITION, IS
THE BATTERY VOLTAGE APPLIED BETWEEN I X-23 AND THE
GROUND?·
·
YES
REPAIR A POOR CONNECTION AT THE CONNCETORS
OR AN OPEN CIRCUIT BETWEEN 5 I-5 AND 1 X-23
NO
IS THERE CONTINUITY BETWEEN 3 X-23 AND THE GROUND?· ·
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 3 X-23 AND 4 C-39
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 4 X-23 AND 13 H-42 (OR 4 H-41 )
·IS THE FUSE F-8 (20A OR 15A) NORMAL?
YES
REPLACE THE FUSE
NO

WIRING SYSTEM 8DÐ149
3-2. FRT Fog Light On The Left (Or Right) Side Inoperative
(While The Clearance Light Is ON)
·IS THE BULB NORMAL ?
YES
REPLACE THE BULB
NO
·IS THERE CONTINUITY BETWEEN 13 H-42 (4 H-41 )
AND 1 C-24 (OR 1 C-29 )?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 13 H-42 (4 H-41 )
AND 1 C-24 (OR 1 C-29 )
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 2 C-24 (2 C-29 )
AND 5 C-16 (OR 6 C-16 )

8DÐ150 WIRING SYSTEM
Rear Fog Light

WIRING SYSTEM 8DÐ151
Circuit Diagram
5.0
W3.0
W FL-1 80A
MAIN
F-8 20A
FRT FOGF-12 15A
TAIL ILLUMI
TAIL
RELAY
BATT.(+)
3
X-9
2
X-9
0.85
R/B
0.85
G/R
0.3
BR/R
0.3
BR/R0.3
G
0.3
G
0.3
G
COMBINATION
SWITCH(8) 4
3
X-91X-9
REAR
FOG
LIGHT
RELAYREAR
FOG
LIGHT
-LH
X-22X-22
X-22
H-27
X-22H-15 1.25
BR/Y1.25
Y/R3.0
Y/R
0.85
BR/Y
1.25
BR/Y1.25
BR/Y0.5
BR/Y 1441 2A
B
C
D
A
1.25
BR/Y1.25
BR/Y0.5
BR/Y
1.25
BR/Y 1.25
BR/Y
B
R-133R-13
1
1.25
B1.25
B
1.25
B 1.25
B
REAR
FOG
LIGHT
-RH
R-123R-12
1
TRAILER
HARNESS
CONNECTOR
H-442H-338H-44
4H-3320
R-4
BODY-RR
11
H-13
E
3
H-15
H-4641
REAR
FOG
LIGHT
INDI-
CATOR
(METER)
LIGHTING
SW
C
D
E
I-10
B-12 10
B-391
B-393
B-39
DIODE
2
7
H-2720I-9
30
0.3
B
0.3
L
0.5
B
1.25
B 1.25
BB-19
BODY-RH
1.25
B
B-122
D08RWA00

8DÐ152 WIRING SYSTEM
Parts Location
Legend
(1) Lighting Switch
(2) R-12
(3) R-4
(4) R-13
(5) H-33
(6) H-44(7) H-46
(8) I-9
(9) B-19
(10) Relay and Fuse Box (X-9, X-22)
(11) H-13, H-15, H-27
(12) Fuse Box (B-39)
(13) I-10
6
7
8
9
10
11
12
13
1
2
3
4
5
D08RWA01

WIRING SYSTEM 8DÐ153
Headlight Leveling
General Description
The circuit consists of the headlight leveling SW and
headlight leveling actuators. The actuator is made
up of a motor, two relays and disk-type sensor. The
sensor rotates in accordance with the rotation of the
motor and stops the rotation of the motor at each
position corresponding to the levels 0 to 3.

8DÐ154 WIRING SYSTEM
Circuit Diagram
3.0
B/Y
0.5
L/W
0.5
L/W
HEADLIGHT
LEVELING
SWITCH
HEADLIGHT LEVELING
ACTUATOR-RH
0.85
L/W
0.5
P/L
0.5
P/L0.5
O/L
0.5
O/L0.5
L/O
0.5
L/O0.5
O/B
0.5
O/B STARTER SW
(IG1)
C-4 10A
ELEC. IG
I-30
6 20
1
C-763I-30
12
H-24
6
C-166 C-76
6 C-77
FENDER-LH7
A
D
C-762C
C-761B
C-765 0.5
L/W0.5
P/L0.5
O/L0.5
L/O0.5
O/B
0.5
B 0.5
BA
C-764
HEADLIGHT LEVELING
ACTUATOR-LH
C-773
C-772
C-771
C-775 0.5
L/W0.5
L/W
0.85
L/W
0.5
P/L0.5
O/L0.5
L/O0.5
O/B
C-774H-127
I-30
2
3
H-24
B
I-30
3
13
H-9
C
I-30
4
11
H-9
D
H-25
0.85
G/R
0.3
R/G
I-30
7 9I-30 TAIL
RELAY(4)
ILLUMINATION
CONTROLLER(3)
C-16
FENDER-LH
D08RW998

WIRING SYSTEM 8DÐ155
Parts Location
9
4
8
10
3
5
6
7
12
D08RW999
Legend
(1) H-12
(2) H-9, H-24
(3) C-16
(4) Headlight Leveling Actuator-LH
(5) C-77(6) Fuse Box
(7) C-76
(8) Headlight Leveling Actuator-RH
(9) H-25
(10) I-30

8DÐ156 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
Trouble modeCheck point
Both actuators inoperative
Actuator on the left (or right) side inoperative
Actuator on the left (or right) side does not
stop
1.
2.
3.
Fuse C-4 (10A) Leveling SWActuator
Cable harnessLH RH

WIRING SYSTEM 8DÐ157
1. Both Actuators Inoperative
YES
REPLACE THE FUSE
NO
·IS THE FUSE C-4 (10A) NORMAL?
IS 6 C-16 AND 7 C-16 GROUNDED
SECURELY?
YES
GROUND THEM SECURELY
NO
·
IS THE CONTINUITY IN THE HEADLIGHT
LEVELING SW NORMAL?
·
YES
REPAIR OR REPLACE THE SWITCH
NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR OPEN CIRCUIT BETWEEN
FUSE C-4 AND 6 I-30
2. Actuator On The Left (Or Right) Side Inoperative
YES
REPAIR OR REPLACE THE ACTUATOR
NO
·DOES THE ACTUATOR-LH (OR RH) OPERATES
NORMALY WHEN THE BATTERY IS CONNECTED
TO THE ACTUATOR CONNECTOR TERMINALS?
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR A OPEN CIRCUIT BETWEEN
FUSE C-4 AND 4 C-77 (OR 4 C-76 )