9-S21
L2800, L3400, WSM
ELECTRICAL SYSTEM
(13) Hazard Unir
Hazard Unit
1. Disconnect the connector from the hazard unit (1).
2. Measure the voltage with a voltmeter across the h terminal and
chassis.
3. If the voltage differs from the battery voltage, the wiring harness
is faulty.
W1055871
(14) Fuel Level Sensor
Fuel Level Sensor
1) Sensor Continuity
1. Remove the fuel level sensor from the fuel tank.
2. Measure the resistance across the sensor terminal and its body.
3. If the reference value are not indicated, the sensor is faulty.
W102625330
(15) Coolant Temperature Sensor
Coolant Temperature Sensor Continuity
1. Measure the resistance across the sensor terminal and the
chassis.
2. If the measurement is not indicated, the sensor is faulty.
W1022725
Voltage h Terminal - Chassis Approx. battery voltage
(1) Hazard Unit
Resistance (Sensor
terminal - its body)
Reference
value
Float at
upper-most
position
1 to 5 Ω
Float at
lower -
most
position
103 to 117 Ω
Resistance
(Sensor terminal -
Chassis)
Factory
spec.
Approx. 16 Ω at 120 °C (248 °F)
Approx. 50 Ω at 80 °C (176 °F)
Approx. 149 Ω at 50 °C (122 °F)
(1) Coolant Temperature Sensor
Tractor Manuals Scotland - Please Do Not Copy
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