Thermal Switch - Sym Joyride125 Service Manual

Thermal Switch

The thermal switch mounted on the radiator
controls the operation of the cooling fan motor.
In case that the fan motor fails to work,
disconnect the green and black/blue leads and
connect jump wires to the terminals, then, turn
on the switch, the fan motor should operate.
If the fan motor still fails to run, measure battery
voltage between the green and black/blue leads.
If there is no voltage, check for blown fuse,
loose connection or short-circuit.
If the fan motor runs, check the thermal switch in
the manner as described below:
Hang the thermal switch on the bowl filled with
coolant to check the switch's opening and
closing temperatures, confirm the switch is open
circuited at room temperature, increase the
coolant temperature gradually. The switch
should have a continuity at 98-102℃.
Caution
Keep the coolant at a constant
temperature at least for three minutes.
Sudden increase the coolant
temperature will cause the thermometer
and the tester to indicate wrong
readings.
Never let the thermometer and the
thermal switch contact the wall of the
bowl, which may result in wrong
readings.
The thermal switch shall be placed in
the coolant until the teeth are
completely submerged.
Thermometer
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17.ELECTRICAL SYSTEM
Thermal Switch
Thermal Switch
17-17