1998 ISUZU TROOPER bulb

WIRING SYSTEM 8DÐ227
Diagnosis
Quick Chart for Check Points
Check pointFuse
C-3
(10A)F-3
(15A)Backup
light
bulbHorn
SWHorn
relayCable
harness
1 Both backup lights inoperativeTrouble mode
2 Backup light on the left (or right)
side do not light up
3 Backup light remains on
Backup
light SW/
Mode SW

WIRING SYSTEM 8DÐ229
2 Backup Light On The Left (Or Right) Side Inoperative
3 Backup Light Remains ON
REPAIR OR REPLACE THE MODE SW (BACKUP LIGHT SW)
·IS THE BACKUP LIGHT BULB ON THE LEFT (OR RIGHT) SIDE
NORMAL?
YES
·WITH THE STARTER SW AND THE BACKUP LIGHT SW AT ON
POSITION, IS THE BATTERY VOLTAGE APPLIED BETWEEN
3 R-13 (OR 3 R-12 ) AND THE GROUND OR 2 R-13
(OR 2 R-12 ) AND THE GROUND?REPLACE THE BULB
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 8 H-32
AND 3 R-13 (OR 3 R-12 ) OR 8 H-32 AND 2 R-13
(OR 2 R-12 )
NOYES
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN BACKUP LIGHT HARNESS SIDE
CONNECTOR 1 R-13 (OR 1 R-12 ) AND R-4

WIRING SYSTEM 8DÐ399
Diagnosis
Diagnosis Procedure
1. Check to see if the battery voltage is normal.
2. Check to see if the fuse is normal.
3. Replace the antiÐtheft & keyless entry control unit with one reserved for test. If a trouble recurs even after replacing
the control unit, find out the cause of the trouble by referring to ÒSystem check procedureÓ and the following list.
ITEM MALFUNCTION POSSIBLE CAUSE DETECTING METHOD REMARKS
ANTIÐTHEFT
indicator light
does not flash
ANTIÐTHEFT
indicator light
does not turn off.
(Steadily on)
When door is
opened by pulling
up locking knob,
alarm does not
operate
Alarm does not
stop. Indicator light
does not change
to fully ON
condition, or does
not come on at
all.Burnt out indicator
light bulb possible.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system. Defective contact of door switch,
or open circuit in door switch
wiring.
Short circuit in the detect switch.
Engine hood, doors and tailgate
are not fully closed and locked.
Defective door switch, or short
circuit in switch wiring.
Defective tamper switch, or short
circuit in wiring.
Defective lock switch, or short
circuit in wiring.
Defective engine hood switch, or
short circuit in wiring.
Defective tailgate switch, or short
circuit in wiring.
Defective control unit.
Poor contact of lock switch, or
open circuit in wiring.
Broken wire in wiring to headlight
and horn, or a blown fuse.
Defective contact of detect
switch, or damaged switch wiring.With door open, dome light and
courtesy light do not come on.
Check the control unit connector.
Check to see if doors are closed
and locked.
Dome light and courtesy light
remain lit on after closing doors.
Check the control unit connector.
Check the control unit connector.
Check the control unit connector.
Luggage room light remains lit
after closing tailgate.
Check alarm operation (See No.
46 of ÒSystem check procedureÓ),
possible cause is a poor contact
of lock switch of an open circuit in
wiring.
Check to see if headlights go out.
Check the control unit connector.
Check the control unit connector. A
C
D
E B

WIRING SYSTEM 8DÐ451
4. Engine Coolant Temperature (ECT) Gauge
4-1 Gauge Needle Does Not Move
·IS THE CONNECTOR OF THE ENGINE COOLANT
TEMPERATURE UNIT CONNECTED SECURELY?
YES
·
·
·DISCONNECT THE CONNECTOR OF THE ENGINE COOLANT
TEMPERATURE UNIT
CONNECT A 3.4W BULB BETWEEN THE HARNESS SIDE
CONNECTOR 1 E-19 OR 1 E-23 AND THE GROUND OF
THE ECT UNIT
WHEN THE STARTER SW IS TURNED ON, DOES THE
ECT GAUGE POINTER MOVE ABOUT 10 SECONDS
AFTER THAT?
YES
CONNECT THE CONNECTOR SECURELY
NO
NO
REPLACE THE ENGINE COOLANT
TEMPERATURE UNIT·IS THE CIRCUIT BETWEEN THE ECT GAUGE AND THE
ENGINE COOLANT TEMPERATURE UNIT NORMAL?
YES
REPLACE THE METER
ASSEMBLY
NO
REPAIR A POOR CONNECTION
AT THE CONNECTORS OR AN
OPEN CIRCUIT IN THE CIRCUIT

WIRING SYSTEM 8DÐ457
6. Fuel Gauge
6-1 Fuel Gauge Needle Does Not Move
·IS THE CONNECTOR OF THE FUEL TANK UNIT F-5
CONNECTED SECURELY?
YES
·
·
·DISCONNECT THE CONNECTOR OF THE FUEL TANK UNIT
CONNECT A 3.4W BULB BETWEEN THE HARNESS SIDE
CONNECTOR 2 F-5 AND THE GROUND OF THE FUEL TANK
UNIT
WHEN THE STARTER SW IS TURNED ON, DOES THE FUEL
GAUGE NEEDLE FLUCTUATE AFTER ABOUT 90 SECONDS?
YES
RECONNECT THE CONNECTOR
NO
NO
·IS THERE CONTINUTY BETWEEN THE FUEL TANK UNIT
CONNECTOR TERMINALS 2 F-5 AND 1 F-5 ?·IS THE CIRCUIT BETWEEN THE FUEL GAUGE AND THE FUEL
TANK UNIT NORMAL?
YESNO
REPLACE THE FUEL TANK
UNIT
YES
REPLACE THE METER
ASSEMBLY
NO
REPAIR A POOR CONNECTION
AT THE CONNECTORS OR AN
OPEN CIRCUIT IN THE CIRCUITREPAIR A POOR
CONNECTION AT THE
CONNECTORS OR AN OPEN
CIRCUIT BETWEEN THE
FUEL TANK UNIT AND THE
GAUGE

8DÐ460 WIRING SYSTEM
7. Warning/Indicator Light
7-1 When The Parkng Brake Lever Is Pulled, The Indicator Light Does Not Light Up
·
·
·DISCONNECT THE PARKING BRAKE SWITCH CONNECTOR
CONNECT THE HARNESS SIDE CONNECTOR TO THE
GROUND
WHEN THE STARTER SWITCH IS TURNED ON, DOES THE
INDICATOR LIGHT LIGHT UP?
YES
·IS THE PARKING BRAKE SWITCH INSTALLED
TO THE CORRECT POSITION?
NO
·DOES THE INDICATOR LIGHT HAVE A BURNED OUT
BULB, OR IS THE SOCKET POORLY CONNECTED?
YES
REPLACE THE METER
ASSEMBLY
NO
REPLACE THE BULB OR REPAIR
THE POOR CONNECTION AT THE
SOCKET
YES
·WHEN THE PARKING BRAKE IS
OPERATED, IS THERE CONTINUITY
BETWEEN THE SWITCH CONNECTOR
1 B-27 AND GROUND?
NO
ADJUST THE INSTALLATION POSITION
NO
REPAIR OR REPLACE THE PARKING BRAKE SWITCH

WIRING SYSTEM 8DÐ463
7-5 Even When The Fuel Tank Is Empty, The Low Fuel Warning Light Does Not Light Up
·DOES THE WARNING LIGHT HAVE A BURNED OUT
BULB, OR IS THE SOCKET POORLY CONNECTED?
·
·DISCONNECT THE ALARM &
RELAY CONTROL UNIT
CONNECTOR B-7
WHEN CONNECT THE
HARNESS SIDE CONNECTOR
6 B-7 WITH THE GROUND,
DOES THE WARNING LIGHT
LIGHT UP?
YES
·IS THE FUEL TANK UNIT NORMAL?REPLACE THE BULB, OR REPAIR A POOR
CONNECTION AT THE SOCKET
NO
REPLACE THE FUEL TANK
UNIT
NOYES
REPLACE THE ALARM &
RELAY CONTROL UNITREPAIR A POOR
CONNECTION AT THE
CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 6 B-6
AND THE METER
NOYES

METER AND GAUGE8E–1
METER AND GAUGE
CONTENTS
Service Precaution 8E–1. . . . . . . . . . . . . . . . . . . . . .
General Description 8E–1. . . . . . . . . . . . . . . . . . . . .
Meter Assembly 8E–2. . . . . . . . . . . . . . . . . . . . . . . . .
General Description 8E–2. . . . . . . . . . . . . . . . . . . . .
Layout for Meters/Gauges, Warning Lights,
Indicator Lights and Illumination Lights 8E–2. . .
Table for Meter/Gauge Connector Terminal
Connections 8E–8. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8E–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8E–14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Light Bulb, Indicator Light Bulb,
Illumination Light Bulb, A/T Indicator
Light Bulb 8E–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8E–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8E–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . Vehicle Speed Sensor 8E–15. . . . . . . . . . . . . . . . . . .
Removal 8E–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8E–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Tank Unit 8E–15. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8E–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8E–15. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi Meter 8E–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8E–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8E–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ambient Sensor 8E–16. . . . . . . . . . . . . . . . . . . . . . . . .
Removal 8E–16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 8E–16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 8E–17. . . . . . . . . . . . .
Service Precaution
WARNING: I F S O E Q U IPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE PERFORMING SERVICE
ON OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
General Description
The circuit consists of the starter switch, meter assembly,
vehicle speed sensor, transmission switch, lighting
switch, turn signal switch, thermo unit, oil pressure unit,
Powertrain Control Module (PCM), fuel tank unit, 4WD
switch, oil pressure switch, parking brake switch, brake
fluid switch, seat belt switch, illumination controller, multi
meter and ambient sensor.