lights ISUZU TROOPER 1998 Service Owner's Guide

8DÐ168 WIRING SYSTEM
Diagnosis
Quick Chart for Check Point
1. RHD
2. LHD
Trouble
modeCheck point
RHD-1
RHD-2
RHD-2
Fuse
F-12
(15A)Lighting
SWTail
relayClearance
light bulbLicense
plate light
bulbCable harness
1-3 Taillight on the left (or
right) side inoperative
1-4 Both clearance
lights inoperative
1-5
Clearance light on the left
(or right) side inoperative
1-6 License
plate light
inoperative
1-7 License plate
light on the
left (or right)
side inoperative
1-1 All illumination lights
inoperative
1-2 Both Taillights inopera-
tive
Taillight
bulb
Trouble ModeCheck pointFuse
F-12
(10A)Lighting
SWTaillight
bulbClearance
light bulbLicense
plate light
bulbCable
harness
2-1All illumination lights
inoperative
2-2Both taillights
inoperative
2-3Taillight on the left (or
right) side inoperative
2-4Both clearance lights
inoperative
2-5Clearance light on the left
(or right) side inoperative
2-6LHD-1
LHD-2
LHD-2License plate
light
inoperative
2-7 License plate
light on the left
(or right) side
inoperative
Fuse
F-11
(10A) Tail
relay
2-8
Both taillight and
clearance light on the left
(or right) side inoperative

WIRING SYSTEM 8DÐ169
1-1 All Illuminations Lights Inoperative
1-2 Both Taillights Inoperative
IS THE BATTERY VOLTAGE APPLIED BETWEEN
HARNESS SIDE CONNECTOR 8 B-12 AND GROUND
WHEN LIGHTING SWITCH IS "ON" ?
REPAIRA POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 7 B-12 AND B-19
OR BETWEEN 4 X-9 AND 1 H-41 )IS FUSE F-12 (15A) NORMAL?
REPLACE THE FUSE
NO
REPAIR OR REPLACE THE SWITCH
NO
IS THE CONTINUITY IN THE LIGHTING SWITCH NORMAL?
YES
YES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 8 B-12 AND FUSE F-12 (15A)
NOYES
· ··
NO
IS TAIL RELAY (X-9) NORMAL?
YES
·
REPAIR OR REPLACE THE RELAY
·DOES THE LICENSE PLATE LIGHT LIGHT UP WHEN THE
LIGHTING SWITCH IS AT THE CLEARANCE LIGHT
POSITION?
YESNO
GROUND R-4 SECURELYREPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 4 H-15 AND 10 H-32

WIRING SYSTEM 8DÐ171
1-4 Both Clearance Lights Inoperative
IS FUSE F-12 (15A) NORMAL?·
·YES
NO
REPLACE THE FUSE
REPLACE THE RELAY
REMOVE THE CONNECTOR OF THE LIGHTING SWITCH
·
IS THERE ANY CONTINUITY BETWEEN 8 B-12 AND
7 B-12 WHEN THE SWITCH IS TURNED TO THE CLEARANCE
LIGHT OR HEADLIGHT POSITION?
YESNO
GROUND IT SECURELY
YESNO
YESNO
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 4 X-9 AND 1 H-41
·
IS THE BATTERY VOLTAGE APPLIED BETWEEN THE
HARNESS SIDE CONNECTOR 8 B-12 AND THE GROUND?REPAIR OR REPLACE THE LIGHTING
SWITCH
REPAIR A POOR CONNECTION AT
THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 3 X-9 AND
8 B-12
·
IS THE TAIL RELAY NORMAL?
IS 1 C-16 GROUNDED SECURELY? ·

8DÐ172 WIRING SYSTEM
1-5 Clearance Light On The Left (Or Right) Side Inoperative
·IS THE CLEARANCE LIGHT BULB ON THE LEFT
(OR RIGHT) SIDE NORMAL?
YESNO
REPLACE THE BULB·IS THERE ANY CONTINUITY BETWEEN THE HARNESS SIDE
CONNECTOR 1 H-41 AND 2 C-22 (OR 2 C-31 )?
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 1 C-22 (OR 1 C-31 ) AND
1 C-16 REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN
THE CIRCUIT
1-6 License Plate Light Inoperative
(RHD-1)
·DO THE BOTH TAILLIGHTS LIGHT UP WHEN THE LIGHTING
SWITCH IS AT THE CLEARANCE LIGHT POSITION?
YESNO
GROUND R-4 SECURELY·IS THE LICENSE PLATE LIGHT BULB NORMAL?
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 2 G-8 AND R-4REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN
THE CIRCUIT
YESNO
REPLACE THE BULB·IS THERE ANY CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTOR 1 G-8 AND 1 H-39 ?

WIRING SYSTEM 8DÐ175
2-1 All Illumination Lights Inoperative
·IS TAIL RELAY NORMAL?
YESNO
REPLACE THE RELAY·IS THE CONTINUITY IN THE LIGHTING SWITCH NORMAL?
YESNO
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 7 B-12 AND B-19REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN THE
CIRCUIT BETWEEN FUSE F-12 AND 8 B-12
YESNO
REPAIR OR REPLACE THE SWITCH·IS B-19 GROUNDED SECURELY?
YESNO
GROUND IT SECURELY·IS THE BATTERY VOLTAGE APPLIED BETWEEN 8 B-12
AND GROUND WHEN LIGHTING SWITCH IS ON?
2-2 Both Taillights Inoperative
·DOES THE LICENCE PLATE LIGHT LIGHT UP WHEN THE
LIGHTING SWITCH IS AT THE CLEARANCE LIGHT
POSITION?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 1 R-13 (1 R-12 )
AND R-4 , OR 2 F-7 (2 F-8 ) AND R-4NOGROUND R-4 SECURELY

8DÐ176 WIRING SYSTEM
2-3 Taillight On The Left (Or Right) Side Inoperative
IS FUSE F-11 (10A) (OR F-12 (10A)) NORMAL?·
·YES
NO
IS THE TAILLIGHT BULB ON THE LEFT (OR RIGHT)
SIDE NORMAL?·
YES
NO
REPLACE THE BULB
REPLACE THE FUSE
WITH THE LIGHTING SWITCH AT THE CLEARANCE
LIGHT POSITION, IS THE BATTERY VOLTAGE APPLIED
BETWEEN 6 R-13 (OR 6 R-12 ) AND THE GROUND,
OR 4 F-7 (OR 4 F-8 ) AND THE GROUND?
YESNO
REPAIR A POOR CONNECTION AT
THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 10 H-32 AND
6 R-13 (OR 9 H-32 AND 6 R-12 ),
OR 10 H-32 AND 4 F-7 (OR 9 H-32
AND 4 F-8 ) REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 1 R-13 (OR 1 R-12 )
AND R-4 , OR 2 F-7 (OR 2 F-8 ) AND R-4
2-4 Both Clearance Lights Inoperative
·IS 1 C-16 (2 C-16 : 4ZE1) GROUNDED SECURELY?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 1 C-16 (2 C-16 : 4ZE1)
AND 1 C-22 (1 C-31 )
NO
GROUND IT SECURELY

WIRING SYSTEM 8DÐ179
2-8 Both Taillights And Clearance Lights On The Left (Or Right) Side Inoperative
·IS FUSE F-11 (10A) OR F-12 (10A) NORMAL?
YES
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN
FUSE F-11 (10A) AND 18 H-12
FUSE F-12 (10A) AND 11 H-12
NO
REPLACE THE FUSE

8DÐ180 WIRING SYSTEM
Interior Illumination Light
General Description
The circuit consists of a lighting switch, tail relay,
illumination controller and illumination lights.
All these lights come on when the lighting switch is
turned on with the switch turned to either parking or
headlight position.
The brightness of illumination lights except the ones
for ashtray, glove box and vanity mirror, can be
adjusted by the illumination controller.

8DÐ192 WIRING SYSTEM
Diagnosis
Interior Illumination Lights Inoperative
NOYES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 2 I-7 AND B-19
NOYES
IS B-19 GROUNDED SECURELY?·
·IS THERE CONTINUITY BETWEEN 3 I-7 AND
THE GROUND?
YES
REPLACE THE ILLUMINATION CONTROLLER
GROUND IT SECURELY
REMOVE THE ILLUMINATION CONTROLLER
IS THERE CONTINUITY BETWEEN 2 I-7 AND
THE GROUND? ·
·
WITH THE LIGHTING SWITCH AT CLEARANCE LIGHT
POSITION, IS THE BATTERY VOLTAGE APPLIED BETWEEN
1 I-7 AND THE GROUND?·
NOYES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 4 X-9 AND 1 I-7
NO
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN TAIL RELAY AND 3 I-7

WIRING SYSTEM 8DÐ193
Turn Signal Light and Hazard Warning Light
General Description
The circuit consists of a turn signal switch
(combination switch), turn signal light, hazard
warning switch and flasher unit. When the turn
signal light switch is turned on with starter switch
on, turn signal light will operate. When turn signal
light is flashing, indicator light in meter also starts
flashing. When hazard warning switch is turned on,
current flows to flasher unit through hazard warning
switch to cause hazard warning light to flash
independent of position of starter switch. At the
same time, indicator lights in meter also start
flashing.