Thermostatic Switch; Temperature Sensor - Honda Hawk GT NT650 1988 Service Manual

THERMOSTATIC SWITCH
The cooling fan motor is actuated by the thermostatic switch
located in the bottom of the radiator.
If the fan motor does not start, disconnect the Black/Blue lead
from the thermostatic switch and ground it with a jumper wire
as shown.
Turn the ignition switch ON. The cooling fan motor should
start running. If it does not start, check for battery voltage
from the Black/Blue lead of the fan motor connector and
ground with ignition switch ON.
If there is no voltage, check for a blown fuse, loose terminals
or connectors, or an open circuit.
If there is voltage, inspect the thermostatic switch as follows:
Remove the switch.
Connect one lead of an ohmmeter to the connector of the
thermostatic switch and the other to the body.
Suspend the thermostatic switch in a pan of coolant (50-50
mixture) and check the temperatures at which the switch
opens and closes.
Make sure that there is no continuity at room temperature and
then gradually raise the coolant temperature. The
switch should show continuity (close) at 93° -97°C (199°-
207°F).
NOTE
Keep the temperature constant for 3 minutes to confirm
continuity.
A sudden change of temperature will cause error tempera-
ture reading between the thermometer and switch.
Do not let the switch or thermometer touch the pan as it will
give a false reading.
Immerse the switch in coolant up to its threads.
Install a new a-ring on the switch.
Apply sealant to the switch threads and install it.
Tighten the switch to the specified torque.
TORQUE: 18 N·m (1.8 kg-m, 13 ft-Ibl
NOTE
• Do not over tighten the switch.
TEMPERATURE SENSOR
Remove the seat and fuel tank.
Disconnect the Green/Blue wire from the temperature sensor.
Check for continuity between the sensor body and ground.
There should be continuity.
If there is no continuity, check the thermostat housing for
looseness and recheck. If there is still no continuity, remove.
The temperature sensor from the thermostat housing.
LIGHTS/METERS/SWITCHES
18-7