1998 ISUZU TROOPER fuse

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

8DÐ138 WIRING SYSTEM
1-2. Headlight On The Left (Or Right) Side Inoperative
1-3. Both Headlights In Low-Beam Inoperative
YES
·IS THE HEADLIGHT BULB ON THE LEFT (OR RIGHT)
SIDE NORMAL?
YES
REPLACE THE FUSE
NO
·IS THE FUSE F-4 (15A) (OR F-5 (15A)) NORMAL?
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN
FUSE F-4 (15A) AND 3 C-21 (LH)
FUSE F-5 (15A) AND 3 C-32 (RH)REPLACE THE BULB
NO
·
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN
13 B-12 AND 10 H-15REPAIR OR REPLACE THE DIMMER•PASSING SWNO
·WITH THE SWITCH AT THE LOW-BEAM POSITION, IS
THERE CONTINUITY BETWEEN THE SW CONNECTOR
TERMINALS 13 B-12 AND 16 B-12
DISCONNECT THE DIMMER•PASSING SW CONNECTOR
(COMBINATION SW)

WIRING SYSTEM 8DÐ139
1Ð4. Headlight Low-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 LOW–BEAM POSITION, IS THERE
CONTINUITY BETWEEN 13 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 13 B–12 AND 1 C–21 (OR 13 B–12
AND 1 C–32 )
·IS THE CONTINUITY BETWEEN
3 C–21 AND F–4 (15A) (OR 3 C–32
AND F–5 (15A)) NORMAL?
NOYES

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

8DÐ144 WIRING SYSTEM
2-2. Headlight On The Left (Or Right) Side Inoperative
·IS THE HEADLIGHT BULB ON THE LEFT (OR RIGHT) SIDE
NORMAL?
YES
REPLACE THE BULB
NO
·IS 7 C-39 (OR 5 C-39 ) GROUNDED SECURELY? (RH)
IS 4 C-39 (OR 7 C-16 ) GROUNDED SECURELY? (LH)
YESNO
GROUND IT SECURELY
REPAIR AN OPEN CIRCUIT BETWEEN
3 C-32 AND 7 C-39 (OR 5 C-39 ) (RH)
3 C-21 AND 4 C-39 (OR 7 C-16 ) (LH)
·IS THE DIMMER RELAY NORMAL?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 X-3 AND FUSE F-6 (10A)
NO
REPLACE THE RELAY
2-3. Both Headlights In Low-Beam Inoperative

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

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