Radiator Cooling Fan Temperature Sensor / Switch: Testing and Inspection

Radiator Fan Switch Test

NOTE: Bleed air from the cooling system after installing the radiator fan switch.

1. Remove the radiator fan switch from the radiator.





2. Suspend the radiator fan switch (A) in a container of water as shown.
3. Heat the water, and check the temperature with a thermometer. Do not let the thermometer (B) touch the bottom of the hot container.





4. Measure the continuity between terminal No. 1 and terminal No. 2 according to the table.