How do you troubleshoot electric cooling fan switch?

To troubleshoot an electric cooling fan switch, first, check for any blown fuses related to the cooling system. Next, use a multimeter to test the switch for continuity; if there's no continuity when the switch is activated, it may need replacement. Additionally, inspect the wiring and connectors for damage or corrosion that could affect the switch's operation. Finally, verify that the cooling fan itself is functional by testing it directly with a power source.