Isuzu N-Series. Service manual — part 1060
CAB AND CHASSIS ELECTRICAL 8-345
4JH1 Engine
2L
B-7
H-25
H-3
B-59
B-59
N-8
N-8
1
J-52
B-1
J-9
H-6
X-13
H-5
P-1
P-2
P-5
2
X-13
1
2
X-13
X-13
4
5
6
J-52
2
N-8
H-25
3
2
H-3
5
2
B-59
4
1
2
FRAME
30B/R
8
B
FL-1 100A
MAIN
8W
5W
8W/B
3W/B
RELAY; CHARGE(5)
0.85W/R
RELAY; HEATER
2B/R
F-2 15A
FUEL HEATER
F-3 15A
REAR HEATER
0.5B/R
0.5B/R
0.3B
FUEL HEATER
0.5B/R
REAR HEATER
0.5B
0.85L/R
0.5L/R
0.5L/W
0
.85L/W
H I
LO
OFF
REAR HEATER
SW
3B
5B
0.5B
2B
0.85L/R
0.85L/W
0.85B/R
1
2
3
0.5W/R
H-25
H-3
0.5B/R
1
6
2B
3B
P-3
P-4
HEADLIGHT BRACKET (LH)
FRAME-LH(FRONT)
FRAME-LH (CENTER)
N8A0396E
8-346 CAB AND CHASSIS ELECTRICAL
Connector List
No.
Connector Face
X-8
X-13
B-59
H-3
H-3
H-25
H-25
J-52
005-006
005-006
004-015
1
2
3
4
006-014
1
2
3
4
5
6
006-015
1
2
3
4
5
6
003-020
2 3
1
003-021
1
3
2
002-033
1
2
J-52
N-8
N-8
P-1
(12 V)
P-2
P-1
(24 V)
P-4
P-2
(24 V)
No.
Connector Face
002-034
2
1
003-022
1
2
3
003-023
2
3
1
000-003
000-004
000-004
000-004
000-006
CAB AND CHASSIS ELECTRICAL 8-347
H-5
H-6
Fuel Heater
P-3
P-5
(12 V)
P-5
(24 V)
No.
Connector Face
000-006
000-007
000-002
1
2
3
7
8
9
13
14 15
19
20 21
25
26 27
31
32 33
34
35
36
37
4
5
6
10
11 12
16
17 18
22
23 24
28
29 30
38
39 40
6
5
4
12
11 10
18
17 16
24
23 22
30
29 28
40
39 38
3
2
1
9
8
7
15
14 13
21
20 19
27
26 25
33
32 31
34
35
36
37
N8A5488E
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
N8A0371E
8-348 CAB AND CHASSIS ELECTRICAL
Characteristic of fuel heater
Rear Heater Switch
Inspection
Check the continuity between the connector terminals
while operating the switch.
Replace the switch when the result of inspection is
found abnormal.
Rear Heater Motor
Inspection
Disconnect the rear heater connector.
Connect the battery positive terminal to the NO.3 termi-
nal of the rear heater motor side connector and negative
to the NO.2. Check to see if rear heater motor operates
low-speed correctly.
Connect the battery positive terminal to the NO.3 termi-
nal of the rear heater motor side connector and negative
to the NO.1. Check to see if rear heater motor operates
high-speed correctly.
Replace the rear heater motor when the result of inspec-
tion is found abnormal.
4WD Transfer (Vacuum Control)
General Description
The circuit consists of the starter switch, 4WD switch,
4WD detect switch, 4L switch, vacuum switching valve,
4WD indicator light, neutral switch and the relay.
When the 4WD switch is turned on to drive in the 4WD
mode, the vacuum switching valve for the transfer con-
trol is activated through the 4WD relay, and the transfer
shift rod connected to the vacuum actuator is shifted to
the 4WD side to turn on the 4WD detect switch. At the
same time, the indicator light in the meter lights on to tell
that the mode is transferred to 4WD mode.
However, when running in the normal mode (2WD), the
4WD switch is not operated. Accordingly, no current
flows through the 4WD vacuum switching valve for the
transfer control, with the 4WD detect switch left in the
“OFF” condition (2WD mode).
N8A5440E
N8A5438E
N8A5439E
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