How do you test a live circuit?

The easiest way is to go to an output in a circuit you know is live (in power). Insert the tester or sensor made in the output slots. If the tester is turned on, its proper operation. If it is not turned on, the tester is bad or requires new batteries.


Link copied to

Get Virtual or In-Home Service

  1. Free expert virtual diagnosis

  2. $50 for a remote fix. No fix? No charge.

  3. Get a pro to help in person