Unfortunately the author was a suicide 4 years ago because you had not replied to his then 2 year old post to thank him.
Another totally useless piece of crap from the homemoaners hub.
By the way, homemoaners hub steals the content from usnet.
If you look you will see TWO wires going from bulb to bulb to bulb. That's parallel.
You touch one end to a hot (black wire), and the other end to a neutral (white wire).
Since switches normally just break the hot wire running to the light, you need to find your neutral (white). You also need to be on the supply side of the switch (the side coming from the breaker panel).
Stick the tester into the two vertical slots of a wall outlet to test its operation.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required