1998 ISUZU TROOPER Service Repair Manual

Page 2729 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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

Page 2730 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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

Page 2731 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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
REPLAC

Page 2732 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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))
NORM

Page 2733 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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 CIRCUI

Page 2734 of 3573

ISUZU TROOPER 1998  Service Repair Manual 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•PASSIN

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ISUZU TROOPER 1998  Service Repair Manual 8DÐ142 WIRING SYSTEM
REPAIR OR REPLACE THE LIGHTING SW
1-10.   Passing Lights Inoperative
·DISCONNECT THE DIMMER•PASSING SW CONNECTOR
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRC

Page 2736 of 3573

ISUZU TROOPER 1998  Service Repair Manual WIRING SYSTEM 8DÐ143
2-1.   Both Headlights Inoperative
·IS THE LIGHTING RELAY NORMAL?
YES
 REPLACE THE RELAY
NO
·IS   B-19   GROUNDED SECURELY?
YESNO
GROUND IT SECURELY·IS THE DIODE NORMAL ?
YESN