1998 ISUZU TROOPER relay

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

WIRING SYSTEM 8DÐ147
2-8. Headlights Remain On When The Lighting SW Is Turned Off
2-9. Headlights Come On When The Lighting SW At The Clearance Light Position
·IS THE LIGHTING RELAY NORMAL?
YES
REPLACE THE RELAY
NO
·
·DISCONNECT THE LIGHTING SW CONNECTOR
YESNO
REPAIR OR REPLACE THE LIGHTING SW
REPAIR A SHORT CIRCUIT BETWEEN 5 X-1
AND 1 B-12
IS THE CONTINUITY BETWEEN THE SWITCH CONNECTOR
TERMINALS 1 B-12 AND 7 B-12 NORMAL?
REPAIR OR REPLACE THE LIGHTING SW
2-10. Passing Lights Inoperative
·
·DISCONNECT THE DIMMER·PASSING SW CONNECTOR
YESNO
REPAIR OR REPLACE THE SWITCH
REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 4 H-12 AND 14 B-12
WITH THE AT PASSING POSITION, IS THERE CONTINUITY
BETWEEN THE SWITCH CONNECTOR TERMINALS 14 B-12
AND 16 B-12 , AND 15 B-12 AND 16 B-12 ?

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

WIRING SYSTEM 8DÐ151
Circuit Diagram
5.0
W3.0
W FL-1 80A
MAIN
F-8 20A
FRT FOGF-12 15A
TAIL ILLUMI
TAIL
RELAY
BATT.(+)
3
X-9
2
X-9
0.85
R/B
0.85
G/R
0.3
BR/R
0.3
BR/R0.3
G
0.3
G
0.3
G
COMBINATION
SWITCH(8) 4
3
X-91X-9
REAR
FOG
LIGHT
RELAYREAR
FOG
LIGHT
-LH
X-22X-22
X-22
H-27
X-22H-15 1.25
BR/Y1.25
Y/R3.0
Y/R
0.85
BR/Y
1.25
BR/Y1.25
BR/Y0.5
BR/Y 1441 2A
B
C
D
A
1.25
BR/Y1.25
BR/Y0.5
BR/Y
1.25
BR/Y 1.25
BR/Y
B
R-133R-13
1
1.25
B1.25
B
1.25
B 1.25
B
REAR
FOG
LIGHT
-RH
R-123R-12
1
TRAILER
HARNESS
CONNECTOR
H-442H-338H-44
4H-3320
R-4
BODY-RR
11
H-13
E
3
H-15
H-4641
REAR
FOG
LIGHT
INDI-
CATOR
(METER)
LIGHTING
SW
C
D
E
I-10
B-12 10
B-391
B-393
B-39
DIODE
2
7
H-2720I-9
30
0.3
B
0.3
L
0.5
B
1.25
B 1.25
BB-19
BODY-RH
1.25
B
B-122
D08RWA00

8DÐ152 WIRING SYSTEM
Parts Location
Legend
(1) Lighting Switch
(2) R-12
(3) R-4
(4) R-13
(5) H-33
(6) H-44(7) H-46
(8) I-9
(9) B-19
(10) Relay and Fuse Box (X-9, X-22)
(11) H-13, H-15, H-27
(12) Fuse Box (B-39)
(13) I-10
6
7
8
9
10
11
12
13
1
2
3
4
5
D08RWA01

WIRING SYSTEM 8DÐ153
Headlight Leveling
General Description
The circuit consists of the headlight leveling SW and
headlight leveling actuators. The actuator is made
up of a motor, two relays and disk-type sensor. The
sensor rotates in accordance with the rotation of the
motor and stops the rotation of the motor at each
position corresponding to the levels 0 to 3.

8DÐ154 WIRING SYSTEM
Circuit Diagram
3.0
B/Y
0.5
L/W
0.5
L/W
HEADLIGHT
LEVELING
SWITCH
HEADLIGHT LEVELING
ACTUATOR-RH
0.85
L/W
0.5
P/L
0.5
P/L0.5
O/L
0.5
O/L0.5
L/O
0.5
L/O0.5
O/B
0.5
O/B STARTER SW
(IG1)
C-4 10A
ELEC. IG
I-30
6 20
1
C-763I-30
12
H-24
6
C-166 C-76
6 C-77
FENDER-LH7
A
D
C-762C
C-761B
C-765 0.5
L/W0.5
P/L0.5
O/L0.5
L/O0.5
O/B
0.5
B 0.5
BA
C-764
HEADLIGHT LEVELING
ACTUATOR-LH
C-773
C-772
C-771
C-775 0.5
L/W0.5
L/W
0.85
L/W
0.5
P/L0.5
O/L0.5
L/O0.5
O/B
C-774H-127
I-30
2
3
H-24
B
I-30
3
13
H-9
C
I-30
4
11
H-9
D
H-25
0.85
G/R
0.3
R/G
I-30
7 9I-30 TAIL
RELAY(4)
ILLUMINATION
CONTROLLER(3)
C-16
FENDER-LH
D08RW998

8DÐ158 WIRING SYSTEM
3. Actuator On The Left (Or Right) Side Does Not Stop
YES
REPAIR OR REPLACE THE ACTUATOR
(FAILURE OF THE SENSOR OR A SHORT
CIRCUIT IN THE ACTUATOR)
NO
·IS THERE CONTINUITY BETWEEN MOTOR
CONNECTOR TERMINALS 4 C-77 AND 6 C-77
(OR 4 C-76 AND 6 C-76 )?
REPAIR OR REPLACE THE ACTUATOR (FAILURE
OF THE RELAY IN THE ACTUATOR)