In addition to the measurement symbols, one symbol you must always be aware of when using a multimeter is the Ground (GND) ...

A multimeter can test for continuity, which shows if an electrical signal is successfully traversing the circuit. This is ...

No multi-meter? For troubleshooting most household things, a continuity tester is extremely handy. And as it turns out, you can make your own from the dollar store for next to nothing.