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

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

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.