Isuzu N-Series. Manual — part 1147
8-300 CAB AND CHASSIS ELECTRICAL
2. Tachometer
Notice:
Figure in parenthesis “( )” indicates the order of inspection.
3. Coolant Temperature Gauge
Notice:
Figure in parenthesis “( )” indicates the order of inspection.
4. Fuel Gauge
Notice:
Figure in parenthesis “( )” indicates the order of inspection.
Check point
Tachometer
Engine speed
sensor
Cable harness
Trouble
mode
2-1. Tachometer does not function
❍
(3)
❍
(1)
❍
(2)
2-2. Tachometer needle fluctuates
(May be wide fluctuation)
❍
(3)
❍
(1)
❍
(2)
2-3. Tachometer needle jumps erratically
❍
(3)
❍
(1)
❍
(2)
Check point
Meter
ASM
Thermo
meter
Thermo
unit
Thermo
seat
Cable
harness
Trouble
mode
3-1. Coolant temperature gauge nee-
dle does not move
❍
(3)
❍
(4)
❍
(2)
❍
(1)
3-2. Coolant temperature gauge read-
ing is too low (or high)
❍
(4)
❍
(5)
❍
(3)
❍
(1)
❍
(2)
3-3. Needle overshoots (or goes up to
the “H” range)
❍
(3)
❍
(4)
❍
(1)
❍
(2)
Check point
Meter ASM
Fuel gauge
Fuel tank
unit
Cable
harness
Trouble
mode
4-1. Fuel gauge needle does not move
❍
(3)
❍
(4)
❍
(2)
❍
(1)
4-2. Even when the tank is filled up with fuel,
the needle does not reach “F”
❍
(3)
❍
(4)
❍
(2)
❍
(1)
4-3. When the tank is not full of fuel, the nee-
dle overshoots (or goes to “F”)
❍
(3)
❍
(4)
❍
(2)
❍
(1)
CAB AND CHASSIS ELECTRICAL 8-301
5. Warning/indicator Light
Notice:
Figure in parenthesis “( )” indicates the order of inspection.
Check point
Light
bulb
Parking
brake
SW
Brake
fluid
SW
Oil
pressure
SW
Fuel
tank
unit
Vacuum
SW
4WD
SW
Sedi-
menter
SW
Seat
belt
SW
Cable
harness
Trouble
mode
5-1. When the parking
brake lever is pulled, the
indicator light does not
light up
❍
(2)
❍
(1)
❍
(3)
5-2. Even when the park-
ing brake lever is
released, the indicator
light does not go off
❍
(1)
❍
(2)
5-3. While the engine
operating, the oil pressure
warning light does not go
off
❍
(2)
❍
(1)
5-4. Even when the tank is
full with fuel, the fuel warn-
ing light lights up
❍
(1)
❍
(2)
5-5. Even when the tank is
empty, the low fuel warn-
ing light does not light up
❍
(1)
❍
(2)
❍
(3)
5-6. Even when the trans-
fer level is shifted to 4WD
position, the indicator light
does not light up
❍
(2)
❍
(1)
❍
(3)
5-7. Even when the float in
the water sedimenter goes
up above the drain warn-
ing level, the indicator light
does not light up
❍
(2)
❍
(1)
❍
(3)
5-8. Even when the brake
fluid is lower than speci-
fied level, the level warn-
ing light does not light up
❍
(1)
❍
(2)
❍
(3)
5-9. Even when the vac-
uum tank is empty vac-
uum warning buzzer does
not sound
❍
(1)
❍
(2)
8-302 CAB AND CHASSIS ELECTRICAL
1. Speedometer
1-1. Speedometer and Odometer Do Not Function
1-2. Speedometer Does Not Function (Odometer Is Normal)
N8A5362E
REPLACE THE SPEEDOMETER ASSEMBLY
N8A0300E
CAB AND CHASSIS ELECTRICAL 8-303
1-3. Odometer Does Not Function (Speedometer Is Normal)
1-4. Speedometer Needle Fluctuates (May Be Wide Fluctuation)
1-5. Speedometer Needle Jumps Erratically
REPLACE THE SPEEDOMETER ASSEMBLY
N8A0300E
N8A5366E
N8A5366E
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