Isuzu N-Series. Service manual — part 1143
8-284 CAB AND CHASSIS ELECTRICAL
Removal
Preparation:
Disconnect the battery ground cable.
1. Door Pad
Refer to “FRONT DOOR TRIM PAD” of section 2.
2. Speaker Panel
Disconnect the speaker connector.
3. Speaker
4. Waterproof Sheet
Installation
To install, follow the removal steps in the reverse order.
Cigar Lighter
Removal
Preparation:
Disconnect the battery ground cable.
1. Center Cluster
Refer to “RADIO” in this section.
2. Cigar Lighter Assembly
Remove the nut, then remove cigar lighter assem-
bly, bezel and outer case.
Installation
To install, follow the removal steps in the reverse order.
Meter and Warning/indicator Light
General Description
The circuit consists of the starter switch, meter assem-
bly, vacuum tank switch, seat belt switch, oil pressure
switch, fuel sedimenter switch, brake fluid switch, park-
ing brake switch, vehicle speed sensor, fuel tank unit,
thermo unit and engine speed sensor.
The meter assembly contains the speedometer, ta-
chometer, fuel meter, thermometer and the warning/in-
dicator light.
The meter warning/indicator lights and their bulb sock-
ets are a unit, they are installed from the back of the
speedometer assembly.
Legend
1. Trim Panel
2. Speaker Panel
3. Speaker
4. Waterproof Sheet
N8A5341E
Legend
1. Center Cluster
2. Cigar Lighter Assembly
N8A5342E
CAB AND CHASSIS ELECTRICAL 8-285
Parts Location
For 12 Volt
F-4, F-7, F-16
J-128 HBB
LEVEL SW
(Except 4JH1)
B-236 AIR
PRESSURE SW
N-5 SEAT BELT SW
H-5~H-7
X-13
BUZZER CANCEL RELAY
X-5 ABS
INDICATOR RELAY
B-18 DIODE
X-33 DIODE
B-338
TACHOGRAPH
(IN INST)
N8A5603E
8-286 CAB AND CHASSIS ELECTRICAL
For 24 Volt
X-33
DIODE
X-5 INDICATOR RELAY
N-5 SEAT BELT SW
F-4, F-7, F-16
H-5~H-8
N8A5604E
CAB AND CHASSIS ELECTRICAL 8-287
Circuit Diagram
Except 4JH1 / 4HK1 Engine
B-51
B-52
0.3BR/Y
0.3BR
B-52
3
0.5W/L
RELAY; CHARGE (5)
B-85
B-85
B-51
14
2
1
0.3W/B
0.5B
0.5B/Y
0.3W/B
0.3W/B
0.3W/B
0.3W/B
0.3B
SHORT CONNECTOR (WITH HBB)
RELAY;
BUZZER CANCEL
BRAKE FLUID SWITCH
3B
11
3
5
X-13
X-13
X-13
X-13
2
4
1
HBB LEVEL
SW
J-128
J-128
2
J-128
J-128
4
12
TACHOMETER
SPEEDOMETER
CHARGE
SEAT BELT (SAUDI ARABIA)
GLOW
COOLANT
TEMPERATURE GAUGE
TURN - RH
BOOST
TURN - LH
HIGH BEAM
EXHAUST BRAKE
SPEED WARNING
(SAUDI ARABIA)
VACUUM
BRAKE FLUID LEVEL
ILLUMINATION (X5)
WATER
SEDIMENTER
OIL PRESSURE
BUZZER
REAR FOG
H-14
H-14
E-2
E-2
H-5
H-5
B-52
B-52
39
38
10
9
1
2
ENGINE
SPEED
SENSOR
0.3L/O
0.5B/L
9
8
H-5
H-14
E-7
B-55
4
23
6
1
0.3Y/B
FUEL GAUGE
FUEL LEVEL
J-28
J-28
3
B-55
B-51
H-5
H-5
10
5
14
21
2
1
J-28
0.3BR/R
0.3Y/R
B-55
H-5
J-32
J-32
B-55
H-5
B-52
H-5
B-55
J-32
7
2
31
19
31
25
2
1
3
0.85B
0.3Y/G
0.3B/Y
0.5B
WATER SEDIMENTER SW
SEAT BELT SW
N-5
N-5
H-12
3B
B-51
H-12
2
10
3
4
3
1
5
1
0.5B
0.3W/G
0.3W/G
J-53
J-54
B-51
H-5
12
30
1
1
0.3BR/W
0.5BR/W
B-51
6
0.3O/L
0.5W
2B
0.5B
0.3W/V
0.5B/Y
QOS-III CONTROL UNIT (13)
ABS
B-51
7
0.5L/O
0.5B/L
0.5L/O
0.5B/L
0.5Y/B
0.5Y/B
THERMO UNIT
0.5BR/R
0.5Y/R
FUEL TANK UNIT
0.5Y/G
0.5B/Y
0.5B
SIG
+
OIL PRESSURE SW (55, 69, 66)
J-8
B-52
H-5
1
20
1
0.3SB
0.5SB
QOS-II CONTROL UNIT (7)
9
TIMER
B-52
12
B-55
B-55
B-55
B-51
EXHAUST BRAKE SW
B-69 (2)
B-51
8
B-52
5
HEAD LIGHT (LH)
TURN SIGNAL LIGHT SW
B-70 (5)
TURN SIGNAL LIGHT SW
B-70 (13)
RELAY:
RR FOG LIGHT(5)
FUSE NO. 9
RELAY; TAIL (5)
H-7
B-67
B-67
B
ST
ACC
ON
OFF
2
P-1
P-2
P-3
P-4
P-5
2
1
3
FRAME
FL-1
3B/Y
STARTER SW
(24V MODEL)
F-16 10A
METER
H-6
3W/L
MAIN
FL-2
100A or 120A
40A(24V)
50A(12V)
KEY SW
8W
0.5B/Y
F-4 15A
AUDIO(B), DOOR LOCK
0.5LG/R
(24V)
0.5LG/L
11
8
10
1
0.5R/G
0.5G/B
0.5G/W
0.5R/B
B-55
2
0.3W
0.5R
0.85R
5W/B (24V)
8W/B (12V)
B-7
J-9
HEADLIGHT
BRACKET (LH)
FRAME-LH
(CENTER)
B-1
FRAME-LH
(FRONT)
0.5B
VEHICLE SPEED SENSOR
DSW
QOS-III CONTROL UNIT (9)
2B
SENSOR
POWER SOURCE
CIRCUIT
B-52
4
EHCU ; ABS
ABS INDICATOR RELAY
X-5
X-5
X-5
X-5
SHORT CONNECTOR (W/O HBB)
1
5
4
3
10
6
2
0.3W/B
PARKING BRAKE
SW
0.3W/B
3
1
H-12
H-5
N-6
0.3W/L
0.3BR
9
3
78
X-33
X-33
X-33
DIODE
0.3
W/R
0.3W/B
H-5
H-5
0.5BR
0.5W/B
13
98
0.5W/R
23
4
B-18
B-18
VACUUM TANK
SW
1
DIODE
AIR PRESSURE
SW
B-236
B-236
2
1
0.3BR
0.3
BR
0.3BR
0.3
BR/Y
B-71
B-18
N8A0527E
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