The following is how a 3-way switch works. This diagram shows the neutral and ground wires going through the switch boxes, but this is not always done. Sometimes just the wires for the switches are run to the boxes...
Then with an ohm meter or a continuity tester and the WIRES DISCONNECTED FROM THE SWITCH, you can place the test leads on a switch and see how it operates. Here is info on using a continuity tester...
(NEVER do this with power on, it will wreck your tester!)
http://www.dinosaurelectronics.com/Test_Fuse.htm





Reply With Quote

Bookmarks