Check all contacts. Test for power at the socket. Turn on the light switch, then ground the tester to a clean screw on the body of the car. Probe the contacts to see if the tester lights.

So you don’t have any secret passageways in your house, but if you’ve got a bookshelf this secret switch can add some fun to your routine. [Brandon] saw a commercially available version… ...

Distributor Live Electronics is stocking a range of push-in wiring switches and indicator lamps from Japanese manufacturer IDEC. “By comparison with traditional screw-in connectors, the devices reduce ...