If the light switch is in good order the multimeter will now read a resistance value close to zero. In my case, I logged 0.4 ohm for an old 3-way switch I know works just fine.

An essential tool for testing light switches is a continuity tester. You also can use a multimeter by turning the dial to read “continuity.” ...

With the multimeter turned on and the test leads plugged into their holes, find a car, truck, tractor or lawn mower with a 12-volt battery. Touch the black lead to the negative terminal and the ...