How do I test the voltage in my exhaust fan? First time multimeter owner!

Hey guys,



I'll be replacing my kitchen's exhaust fan (it's a LUFTIG from IKEA). So this means disconnecting the wires. But naturally, I want to make sure that I don't electrocute myself.



I'll be getting a voltmeter/multimeter, but I have no idea how to test my exhaust fan for electric activity. I've checked several Youtube videos, and while many of them do a great job showing you how to check your batteries there don't seem to be any that show you how to test your appliances' wires before you start touching them.



Here's the exhaust fan's underside:





And another photo:

• Where do I place the test probes? Directly on the wire? On the circuit board?


• Do I select AC for the multimeter's settings? And what scale of measurement is most appropriate for this type of appliance?

I'm really new to the world of wiring and electronics (I'm a software developer, for cryin' out loud). Help me avoid getting electrocuted while replacing this exhaust fan!

How do I test the voltage in my exhaust fan? First time multimeter owner!