If you only have two wires, the black and the white in the switch box, that
timer won't work. You need a mechanical timer. That timer requires a
neutral. Your current switch has a hot wire and a return, but no neutral. If
you had a neutral, you'd wire the hot to black, the neutral to white, and
the load (wire that goes to the light), to blue



wrote in message
ups.com...
Hi all,

Sorry if this is really trivial, or has asked before, but I can't seem
to find an answer.

I just bought a new light switch for the laundry room in the basement.
It is a Leviton brand which has a bunch of buttons to give you a
predefined amount of "on" time for the light - i.e. you hit the "10"
button for 10 minutes of light.

The switch has 4 wires: Black, white, green, blue. The old basic
switch has 2 wires - black and white. The wiring diagram from Leviton
shows multiple wires coming in from the top and bottom of the switch
box, and how to wire things appropriately.

My old switch has only the two wires: black and a white.

I assume the new switch green goes to the grounding screw on the box.
I also assume the white should be joined to the white, and the black to
the black, each through Marrs connectors.

What do I do with the blue. I've tried a couple of things (joining it
in with the blacks) which powers the switch properly (it has LEDs that
show which timer setting is in use) but the light doesn't go on - which
is really the whole point of a switch....

What should I be doing?

TIA,

Dave