Isuzu N-Series. Service manual — part 1115
8-172 CAB AND CHASSIS ELECTRICAL
Connector List
No.
Connector Face
B-67
B-67
B-152
B-155
B-156
X-1
X-11
P-1
004-001
1
2
3
4
004-002
2
4
1
3
003-016
3
1
2
003-016
3
1
2
010-002
5
2
1
6
7
8
9
4
3
10
005-006
005-001
1
3
2
4
5
000-003
P-2
P-5
B-420
(24 V)
B-421
B-xxx
B-xxx
No.
Connector Face
000-004
000-007
006-019
4
5
6
1
2
3
014-002
1 2 3
7 8 9 10
11
4
12
5
13
6
14
006-002
1
3 4 5 6
2
006-003
2
6 5 4 3
1
CAB AND CHASSIS ELECTRICAL 8-173
H-7
Diagnosis
Quick Chart for Check Points
1
2
1
2
1 2 3 4
5 6 7 8
9 10 11 12 13
14 15 16 17 18
2
1
2
1
4 3 2 1
8 7 6 5
13 12 11 10 9
18 17 16 15 14
H - 6
H - 7
H - 8
N8A5489E
Check point
Fuse
F-12 (10 A)
Headlight
leveling
switch
Headlight
leveling
actuator
Cable
harness
Trouble
mode
1. Both actuators inoperative
❍
❍
❍
2. Actuator on the left (right) side inop-
erative
❍
❍
3. When leveling SW is turned to a
certain position, actuator inoperative
❍
❍
❍
8-174 CAB AND CHASSIS ELECTRICAL
1. Both Actuators Inoperative
2. Actuator on the Right (Left) Side Inoperative
• IS FUSE F-12 (10A) NORMAL?
• IS B-7 GROUNDED SECURELY?
YES
NO
REPLACE THE FUSE
• TURN THE STARTER SW TO ON POSITION
• IS THE BATTERY VOLTAGE APPLIED BETWEEN THE
FUSE TERMINAL AND THE GROUND?
YES
NO
GROUND IT SECURELY
• IS THE CONTINUITY IN THE HEADLIGHT LEVELING
SW NORMAL?
YES
NO
REPAIR AN OPEN CIRCUIT BETWEEN STARTER
SW AND FUSE F-12 (10A)
• IS THERE CONTINUITY BETWEEN 6 B-156 AND THE
GROUND?
YES
NO
REPAIR OR REPLACE THE SWITCH
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN FUSE F-20 AND
1 B-155 (1 B-152 )
YES
NO
REPAIR AN OPEN CIRCUIT BETWEEN
6 B-156 AND B-7
N8A0149E
N8A5170E
CAB AND CHASSIS ELECTRICAL 8-175
3. When Headlight Leveling SW is Turned to A Certain Position, Actuator Inoperative
Inspect and repair the circuit that is corresponding to the
headlight leveling switch position where the actuator be-
comes inoperative.
Actuator - RH
Actuator - LH
Starter Switch
Refer to “START AND CHARGING” in this manual.
Headlight Leveling Switch
Inspection
Check the continuity between the switch connector ter-
minals.
Repair or replace the switch when the result of inspec-
tion is found abnormal.
Removal
Preparation:
Disconnect the battery ground cable.
1. Switch Bezel
2. Headlight Leveling Switch
Disconnect the connector.
N8A5171E
Headlight leveling
SW position
Circuit
1
Between 3
and 3
2
Between 2
and 4
3
Between 1
and 5
0
Between 4
and 2
Headlight leveling
SW position
Circuit
1
Between 3
and 3
2
Between 2
and 4
3
Between 1
and 5
0
Between 4
and 2
B-156
B-155
B-156
B-155
B-156
B-155
B-156
B-155
B-156
B-152
B-156
B-152
B-156
B-152
B-156
B-152
N8A5174E
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