1998 ISUZU TROOPER high beam

8DÐ140 WIRING SYSTEM
1Ð5. Both Headlights In High-Beam Inoperative
·DISCONNECT THE DIMMER•
PASSING SW CONNECTOR (COMBINATION SW)
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN
15 B-12 AND 16 H-16REPAIR OR REPLACE THE DIMMER•
PASSING SW
NO
·WITH THE SWITCH AT HIGH-BEAM, IS THERE
CONTINUITY BETWEEN THE SWITCH CONNECTOR TERMINALS
15 B-12 AND 16 B-12 ?
1Ð6. Headlight High-Beam On The Left (Or Right) Side Inoperative
·IS THE HEADLIGHT BULB ON THE
LEFT (OR RIGHT) SIDE NORMAL?
YES
·IS THE FUSE F–4 (15A) (OR F–5 (15A))
NORMAL?
YES
REPLACE THE BULB
NO
·DISCONNECT THE DIMMER·PASSING SW CONNECTOR
·WITH THE SWITCH AT THE HIGH–BEAM POSITION, IS THERE
CONTINUITY BETWEEN 15 B–12 AND 16 B–12 ?
YES
REPLACE THE FUSE
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 3 C–21 AND F–4
(15A) (OR 3 C–32 AND F–5 (15A))
NO
REPAIR OR REPLACE THE DIMMER·PASSING SWREPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 15 B–12 AND 2 C–21 (OR 15 B–12
AND 2 C–32 )
·IS THE CONTINUITY BETWEEN
3 C–21 AND F–4 (15A) (OR 3 C–32
AND F–5 (15A)) NORMAL?
NOYES

WIRING SYSTEM 8DÐ141
1-7. Headlight Beam Does Not Change
1-8. Headlights Remain On When The Lighting SW Is Turned Off
YES
·DISCONNECT THE DIMMER•PASSING
SWREPAIR OR REPLACE THE DIMMER•PASSING SW
NO
·DOES THE LEVER OF THE DIMMER•
PASSING SW OPERATE SMOOTHLY AND SECURELY?
·WITH THE SWITCH AT THE LOW-BEAM POSITION, IS
THERE CONTINUITY BETWEEN 13 B-12 AND 16 B-12 ?
ALSO, WITH IT AT THE HIGH-BEAM POSITION, IS THERE
CONTINUITY BETWEEN 15 B-12 AND 16 B-12 ?
NO
REPAIR OR REPLACE THE DIMMER•PASSING SW
YES
·REPLACE THE LIGHTING RELAY
NO
·IS THE LIGHTING RELAY NORMAL?
REPAIR OR REPLACE THE LIGHTING SW
NO
DISCONNECT THE LIGHTING SW CONNECTOR
·IS THE CONTINUITY BETWEEN
THE SWITCH CONNECTOR TERMINALS 1 B-12 AND
7 B-12 NORMAL?
YES
REPAIR A SHORT CIRCUIT BETWEEN
5 X-1 AND 1 B-12

WIRING SYSTEM 8DÐ145
2-4. Headlight Low-Beam On The Left (Or Right) Side Inoperative
2-5. Both Headlights In High-Beam Inoperative
·IS THE HEADLIGHT BULB NORMAL?
YESNO
REPLACE THE BULB·IS THE FUSE F-6 (10A) (OR F-7 (10A)) NORMAL?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN FUSE F-6 (10A) AND 1 C-21
(OR FUSE F-7 (10A) AND 1 C-32 )
NO
REPLACE THE FUSE
·IS THE DIMMER RELAY NORMAL?
YESNO
REPLACE THE RELAY·
·DISCONNECT THE DIMMER·PASING SW CONNECTOR
IS THERE ANY CONTINUITY BETWEEN THE SWITCH SIDE
CONNECTOR 15 B-12 AND 16 B-12 WHEN THE
SWITCH IS AT HIGH-BEAM POSITION?
YESNO
REPAIR OR REPLACE THE SWITCH·IS THE BATTERY VOLTAGE APPLIED BETWEEN THE
HARNESS SIDE CONNECTOR 15 B-12 AND GROUND
WHEN THE SWITCH IS AT HIGH-BEAM POSITION?
YESNO
REPAIR A POOR CONNECTION AT THE CONNEC-
TORS OR AN OPEN CIRCUIT BETWEEN 5 X-3
AND 15 B-12REPAIR A POOR CONNECTION AT THE CONNECTOR OR AN
OPEN CIRCUIT BETWEEN 3 X-3 AND FUSE F-4 (10A)

8DÐ146 WIRING SYSTEM
2-6. Headlight High-Beam On The Left (Or Right) Side Inoperative
2-7. Headlight Beam Does Not Change
·IS THE CONTINUITY IN THE DIMMER·PASSING
SW NORMAL ?
YES
REPAIR OR REPLACE THE SWITCH
NO
·IS B-19 GROUNDED SECURELY?
YESNO
GROUND IT SECURELY
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 5 X-3 AND 15 B-12
·IS THE DIMMER RELAY NORMAL?
YESNO
REPAIR AN OPEN CIRCUIT BETWEEN 16 B-12 AND
B-19
REPLACE THE RELAY·IS THERE CONTINUITY BETWEEN 16 B-12 AND
B-19 ?
YESNO
·IS THE HEADLIGHT BULB NORMAL?
YESNO
REPLACE THE BULB·IS THE FUSE F-4 (10A) (OR F-5 (10A)) NORMAL?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN
(LH) FUSE F-4 (10A) AND 2 C-21
(RH) FUSE F-5 (10A) AND 2 C-32
NO
REPLACE THE FUSE

WIRING SYSTEM 8D – 415
%38
Circuit Diagram (RHD 6VD1 W/O T.O.D)-5
I
J
0.3
Y/G 0.5
Y/R
0.5
Y/R
BODY-RR
ALARM&RELAY
CONTROL UNIT FUEL
TANK
UNIT
0.5
B
1.25
B 0.5
B/P0.3
Y/BR
0.3
Y/BR
0.3
Y/BR
7
17 144 1
12
B-66
B-7
DIMMER•
PASSING
SW FUSE F-4
0.85
R/Y 0.85
R/L
14 15 13
9 I-10 I-10 H-16
H-9 HIGH
BEAM
R-4F-5H-332
F-518H-46
13H-33F-5H-33H-46
0.5
Y/R
FUEL
TANK
UNIT
0.5
B/P0.3
Y/BR
0.3
Y/BR
179 4 1
19F-5H-332
F-57H-33 (SOUTH AFRICA)F-5H-33H-46

8D – 420 WIRING SYSTEM
Circuit Diagram (RHD 6V*1 W/T.O.D)-4
%38
FG
4
10
AC GENERATOR
(L)ILLUMINAITON
CONTROLLER(3)TAIL RELAY
(4)TURN SIGNAL/CORNERING
LIGHT SW
BODY-RH 0.85
W/G
0.85
W/GI-9
H-161
H-325
0.5
R/G10
0.3
B 0.85
G/B 0.85
G/R0.85
P/B
1.25
B
1.25
B20
I-10H-27
B-191
6
1110
I-10 H-27
2414
I-9 CHARGE METERTURN
-LHTURN
-RH ODO/
TRIP
METER
METER
I-9 I-9 H-16
H-27
DIMMER•
PASSING
SW FUSE F-4
0.85
R/Y 0.85
R/L
14 15 13
9 I-10 I-10 H-16
H-9 HIGH
BEAM

WIRING SYSTEM 8D – 421
Circuit Diagram (RHD 6V*1 W/T.O.D)-5
%38
I
J
0.3
Y/G 0.5
Y/R
0.5
Y/R
BODY-RR
ALARM&RELAY
CONTROL UNIT FUEL
TANK
UNIT
0.5
B
1.25
B 0.5
B/P0.3
Y/BR
0.3
Y/BR
0.3
Y/BR
7
17 144 1
12
B-66
B-7
DIMMER•
PASSING
SW FUSE F-4
0.85
R/Y 0.85
R/L
14 15 13
9 I-10 I-10 H-16
H-9 HIGH
BEAM
R-4F-5H-332
F-518H-46
13H-33F-5H-33H-46
0.5
Y/R
FUEL
TANK
UNIT
0.5
B/P0.3
Y/BR
0.3
Y/BR
179 4 1
19F-5H-332
F-57H-33 (SOUTH AFRICA)F-5H-33H-46

WIRING SYSTEM 8D – 427
D08RW741
Circuit Diagram (RHD 4JG2)-5
F
I
I-1015
F-5
FUEL
TANK
UNIT
2
H-3313H-4618B-67
B-76
I-10 HIGH
BEAM
H-9
DIMMER·
PASSING
SW14
9H-16
0.85
R/L
0.5
Y/R0.5
Y/R
0.5
B 0.5
B/P 0.85
R/Y
1.25
B0.3
Y/G
0.3
Y/BR0.3
Y/BR
0.3
Y/BR
ALARM & RELAY
CONTROL UNIT
FUSE F-4
13
F-5
4H-3314H-4617
F-5
1H-3312R-4
BODY-RR