Installation tips:

Turning off the engine, replace the new cooling fan temperature switches after the water in engine radiator cooled to the room temperature.
Avoid the external high heat source after installation.
Avoid sprinkling water on surrounding auto parts during the installation.

How to replace it?

Locate the cooling fan switch near the thermostat housing on the left side of engine behind the distributor assembly. The switch wire colors should be green and black.
Disconnect the wire terminal from the cooling fan switch.
Allow the engine to reach a coolant temperature of 196-203°F (91-95°C).
Using a suitable ohmmeter or continuity tester, check for continuity between the two fan switch terminals. The fan switch should have continuity (switch closed) at the above temperatures. The switch should have no continuity (switch open) when the temperature drops between 5-15°F (3-8°C) from the temperature that the switch first had continuity (switch closed).
If the switch does not operate within the range of the supplied information, allow the engine to cool below 100°F (37°C) and replace the switch.

WARNING

Submerging the electric cooling fan switch below the threads could damage the component. Coolant must be used for this test as the boiling point of water is below the temperature required for testing some of the sensors. Perform this procedure in a safe and well-ventilated area. Do not breathe any fumes from the heated coolant. Wear eye protection and use care to not come in contact with any of the heated components. Do not use a heating device that produces an open flame.