By using a flashlight to shine a raking light for better contrast ... While most likely not a part of the original electrical wiring in the building, this switch represents the installation of a new ...

If one is not present, as is the case with switch loop wiring, check at the light fixture itself. If you have a neutral there ...

Loosen the terminal screws and unhook the wiring from the old fixture ... Then, remove the light bulb and fixture cover to access the switch mechanism. Remove the old switch and attach the ...