low beam ISUZU TROOPER 1998 Service Repair Manual

1A Ð 20 HEATING AND VENTILATION
REAR HEATER DUCT, DEFROSTER NOZZLE AND VENTILATION DUCT
Removal Steps
1. Instrument panel assembly
2. Center ventilation upper duct
3. Side ventilation duct
4. Center ventilation lower duct
5. Driver lap duct
6. Center console
7. Rear heater duct
8. Cross beam assembly
9. Side defroster nozzle
10. Center defroster nozzle
Installation Steps
To install, follow the removal steps in the
reverse order.
7
9
9
10
8
6
3
5
1
3
4
2
This illustration is based on LHD

HEATING AND VENTILATION 1A Ð 21
INSTALLATION
To install, follow the removal steps in the reverse order,
noting the following point:
1. Connect each duct and nozzle securely leaving no
clearance between them and making no improper
matching.
REMOVAL
Preparation:
Disconnect the battery ground cable
1. Instrument panel assembly
·Refer to Section 10 ÒBODYÓ for INSTRUMENT
PANEL ASSEMBLY removal procedure.
2. Center ventilation upper duct
3. Side ventilation duct
4. Center ventilation lower duct
5. Driver lap duct
6. Center console
7. Rear heater duct
·Refer to Section 10 ÒBODYÓ for CONSOLES
removal procedure.
8. Cross beam assembly
·Refer to Section 10 ÒBODYÓ for CROSS BEAM
ASSEMBLY removal procedure.
9. Side defroster nozzle
10. Center defroster nozzle

HEATING AND VENTILATION 1A Ð 31
REMOVAL
Preparation:
Disconnect the battery ground cable
1. Instrument panel assembly
Refer to Section 10 ÒBODYÓ for ÒINSTRUMENT
PANEL ASSEMBLYÓ removal procedure.
2. Instrument panel center bracket
Refer to Section 10 ÒCROSS BEAM ASSEMBLYÓ
removal procedure.
3. Rear heater duct
4. Ceramic heater
1) Disconnect the connector and remove the heater
fixing screw and heater harness fixing clamps.
2) Pull the ceramic heater out from heater unit.
4a. Full hot switch
Disconnect the switch connector and remove the
switch fixing screw and switch harness fixing clamp.
INSTALLATION
To install, follow the removal steps in the reverse order,
noting the following points.
1. The installation should be made with care so that
there is continuity between the switch side connector
terminals when the knob is set to the ÒFull HotÓ
position.
2. Be sure to handle the EGR and the ABS control unit
with care to avoid the disengagement of connectors.

LIGHTING SYSTEM8A–29
Light NameRated PowerNumber of
BulbsLens ColorRemarks
Headlight60w/55w2WhiteHalogen
FrontTurn signal light21w2Whitecombination
lightClearance light5w2Amber
FRT fog light55w2WhiteHalogen
Taillight/Stoplight5w/21w2Red
RearBumperTurn signal light21w2Ambercombination
lightTaillight/Stoplight5w/21w2RedBodyTurn signal light21w2Amber
Backup light21w2White
RR fog light21w2Red
Side turn signal light5w2Amber
License plate lightBumper5w2White
Body5W1White
High mount stoplight——RedLED
Map light5w2White
Dome light10w1White
Luggage room light8w1White
Courtesy light3.8w2White
A/C SW60mA1
RR defogger SW0.84w1
Mirror defogger SW0.84w1
FRT fog light SW0.7w1
RR fog light SW0.7w1
Cruise (Set)1.4w1Meter
Cruise (Main)1.4w1Meter
Check trans3w1Meter
Anti-theft3w1Warning box
Turn signal1.4w2Meter
Golw1.4w1Meter
Water sedimenter1.4w1Meter
Indicator/High beam1.4w1MeterWarning
lightABS1.4w1Meter
Check engine1.4w1Meter
Low fuel1.4w1Meter
4WD1.4w1Meter
Oil Pressure1.4w1Meter
Brake system1.4w1Meter
Charge1.4w1Meter
Seat belt2w1Meter
A/T shift position0.91w7Meter
A/T oil temp3w1Meter

WIRING SYSTEM 8DÐ129
Circuit Diagram (RHD)-2
A
B
C
C-24
FOG
LIGHT
-LHHEAD
LIGHT
-LHHEAD
LIGHT
-RH
LIGHTING
SW
DIMMER·PASSING
SW
(COMBINATION
SW)
1.25
V
1.25
V
0.5
B0.5
B
FOG
LIGHT
-RHHIGH
BEAM
INIDI-
CATOR
(METER)
1
2
C-29
0.85
R/L
0.85
R/Y 0.85
R/Y0.85
R/L
1.25
R/Y
1.25
R/Y
1.25
R/Y0.3
V/R
0.5
B 0.3
V/R
1.25
B
BODY-RH LOW HIGHPASS
H-1510
H-1316
H-4113
H-99
H-4116
14
I-10
I-10
1 C-21
212 C-21
13
B-12
15
B-1214 15
C-213
1
2 C-24 C-29
5
C-16
FENDER-LH
D
E
F
0.85
LG/R
0.85
Y
0.85
Y 0.85
Y
0.85
Y1.25
R/Y
C-32
C-32
C-323
B-12
16
B-12
7
B-19
1
B-12
B-12
D08RW609

8DÐ132 WIRING SYSTEM
AC-24
FOG
LIGHT
-LHHEAD
LIGHT
-LH
LIGHTING
SW DIMMER/
PASSING
SW
1.25
V
1.25
V
0.5
B0.5
B
FOG
LIGHT
-RHHIGH
BEAM
INIDI-
CATOR
(METER)
1
2
C-290.5
V/R
0.3
V/R0.5
V/R
0.5
B
1.25
B LOW HIGHPASS
H-1510
15
B-1214 1
2 C-24 C-29
5
C-16
FENDER-LH
1
C-39
4
C-39
4
C-39
8
C-39
10 4
H-16
B
C
G
0.85
Y 0.85
Y
0.85
R/Y 0.85
R/Y
(4JG2) (4JG2)
(4JG2)
(4JG2) 0.85
B0.85
B
0.85
B0.85
B
FENDER-RH FENDER-RH FENDER-RH BODY-LH0.5
B0.5
B 3
C-21H-41
C-211
2
B-12
16
B-12
7
B-19
1
B-12
B-12 C-21
H-4116
13
H-41
HEAD
LIGHT
-RH
7
C-39
D
E
F
0.85
R/G0.85
R/L0.5
R
0.85
B3
C-32
C-321
2
C-32
H-4114
12
H-41110.5
R/Y
0.85
R/Y
0.85
R/L
15
I-10
I-10H-16
14
3
H-411.25
R
D08RW804
Circuit Diagram (LHD)-2

8DÐ134 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
1. Headlight (RHD)
Check point
Trouble modeFuse
F–4
(15A)F–5
(15A)Lighting
relayLighting
SWDimmer•
Passing
SWCable
harness Headlight
bulb
1–1. Both Headlights inoperative
1–2. Headlight on the left (or
right) side inoperative
1–3. Both headlights in
low-beam inoperative
1–4. Headlight low-beam on
the left (or right) side
inoperative
1–5. Both headlights in
high–beam inoperative
1–6. Headlight high-beam on the
left (or right) side
inoperative
1–7. Headlight beam does not
change
LH RH
1–8. Headlights remain on when
the lighting SW is turned off
1–9. Headlights come on with
the lighting SW at the
clearance light position
1–10. Passing lights inoperative

WIRING SYSTEM 8DÐ135
Check point
Trouble modeFuse
F–4
(10A)F–5
(10A)Dimmer
relayLighting
SWDimmer•
Passing
SWCable
harness Headlight
bulb
2–1. Both Headlights
inoperative
2–2. Headlight on the
left (or right) side
inoperative
2–3. Both headlights
in low-beam
inoperative
2–4. Headlight low-
beam on the left
(or right)
side inoperative
2–5. Both headlights
in high-beam
inoperative
2–6. Headlight
high-beam on
the left (or right)
side inoperative
2–7. Headlight beam
does not change
Lighting
relayF–6
(10A)F–7
(10A)
2–8. Headlights
remain
on when the
lighting SW is
turned off
2–9. Headlights come
on with the
lighting SW at
the clearance
light position
Diode
2–10. Passing lights
inoperative
LH
RH
2. Headlight (LHD)

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