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Replacing the light switch and wiring the new one back in?

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This is an edit of my original problem posted a few minutes ago. I'm replacing a foyer light that is operated by a double light switch ON THE WALL (switch 1 turns on the foyer light, switch 2 turns on...

Wiring is difficult to see without clear description of each wire inside the box... and more difficult when folks take wiring apart without taking photo of wiring before starting. Then they throw away the old switch,,, so comparison cannot be made to new switch.

That being said:
Did you install a new 3-way switch?
Is it a 3-way switch with 2 brass screws and 1 dark screw and 1 green screw? The dark-colored screw is common screw.

If you installed new 3-way switch, then it is probably wired wrong.
Or there is damage to a wire that is not covered with repair... or both bad wire and wrong wiring.

Look at OLD 3-way switch and identify which screw is the common screw. Should be marked on back of device.
Identify which wire went to common screw on OLD switch.
Look at NEW switch, and identify which is the common screw (dark-colored screw), and then attach OLD common wire to NEW common screw.

Otherwise, put old switch back into box... see if it works... take some photos... attach photos to comment to this thread ... take photo of new switch from back, showing all screws so I can see what is going on.

We can fix it it...and I will be here all evening to assist.


Sep 19, 2013 | Home

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Replacing a switch on a ceiling fan

Wall mount. Cut the power to the switch by tripping the breaker at the "fuse box". You will need help to see what breaker controls that lighting circuit.
Get new switch,remove old switch from wall mount and note the color coding of the wires.
There will be screws that attach the power wires to the switch and
wires that go to the fan.Power wires are one black and one white. The other wire is a green ground wire.
Remove the wires,one at a time and connect to the switch,IF there is enough wire length to do so.You will need pliers to yank the wires out.
The stripped,bare wire at the end should go on the new fan switch so when you tighten the wire end,the wire end tightens onto the terminal clockwise.

If the stripped end is broken off,strip another 3/4" of wire and wrap the wire around the terminal,clockwise.

You MAY test the switch B-4 you put it back into the wall.Be careful of the "hot" black wire.

Click the circuit breaker back off and install into the wall box.

Jan 18, 2013 | Hunter 52" Ceiling Fan With Light And...

1 Answer

Replacing a single pole switch with a Leviton decora motion sensor switch do both black wires from original switch connect to black wire of new switch and white wire to red wire

The old single pole switch has 2 black wires.
One black wire is hot from circuit breaker box, and the other black wire goes to load (light, fan, motor)

New device has black wire: connect this to hot from circuit breaker box.
New device red wire: connect this to load wire
New device has white wire: connect this to Neutral wires.
Neutral wires are white wires that are twisted together and covered with wire nut and pushed to back of box. If your box does not have neutral wires, then connect device white wire to bare ground wire.

Take a moment and vote on answer:
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on electrical or any do-it-yourself project.
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Aug 28, 2011 | Leviton R01-PR180-1LI Decora 180 Degree...

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I am replacing a programmable timer switch that controls exterior garage lights. This switch is in the same box as a ac switch that turns on the lights inside the garge. There are 3 rolmex wires inside the...

Project is not clear.
Are you replacing the timer with a switch?
I have complete files on timers, so if you are replacing the old timer with a new timer, then add a comment and say which timer you are installing.

You have 3 cables. Assuming 120Volts.
Each cable has 1 black and 1 white and 1 ground.
White wires are twisted together and pushed to back of box.
Ground wires are twisted together and pushed to back of box.
Black wires are next:

(A) Cable A:
One of the three cables will have a black wire that connects to both the switch and to the timer.
So look for the black wire that connects to both switch and to timer.
This is the hot wire from breaker box. Connect this black wire to both switches including new switch.

(B) Cable B: One cable goes to garage lights. Black wire going to garage lights connects to on-off switch.
So the garage light switch has 2 black wires: 1 black wire from cable A, and 1 black wire from cable B going to light.

(C) Cable C: One cable goes to outdoor lights. Black wire going to outdoor lights connects to new on-off switch.
So the outdoor light switch has 2 black wires: 1 black wire from cable A, and 1 black wire from cable B going to light.

Jun 27, 2011 | Hardware & Accessories

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I have a single pole switch that currently controls a bedroom outlet. i am installing a fan and light in the bedroom. i have a new triple switch that i want to control the existing outlet, the fan and the...

Wiring is not fully described: Location of hot wire and neutral wire from breaker box are unknown.
If Hot wire arrives in ceiling box first, the switch box will not have white neutral wires that are twisted together and covered with wire nut. Neutrals will be in ceiling box.

What is known: You are replacing single pole switch attached to one 14-2 wire going to light.
You are replacing light with a fan-light and replacing switch with a 3-pole TM8111 switch.
You have replaced 14-2 wire with 12-3 wire.

TM8111 wiring shows following link:
Fan pull-chain wiring shows following link:
Assume neutrals in ceiling box.
Assume Hot wire in ceiling box: Connect 12-3 black wire to black Hot wire. Connect 12-3 white wire to black wire on light. Connect 12-3 red to red wire on fan.
White neutral from fan and white neutral form light connect to other white neutral wires and covered with wire nut.
Wiring at switch:
Black Hot wire from ceiling box connects to A COM terminal.
White wire to ceiling light connects to A SP2
Red wire to fan connects to A SP1

Jun 21, 2011 | Pass & Seymour Legrand TM8111 Three Single...

1 Answer

I am replacing an existing switch/single outlet, the outlet was always live.the switch controlled a light. the existing sw was very old and only has connections on the back top.. The left had 2 white wires...

White wires under the silver screw...
The black wire under the black screw...
and the red wire under the brass screw...

If it does not work right then switch the red and black wires...


Apr 20, 2011 | Pass & Seymour / Legrand 1595-2SWT...

1 Answer

I just bought a timer to replace a light switch. The switch I m replacing has two black wires. The new time switch has FOUR, blue, white and green. Any advice?

Hook your black wire to the black and the blue wires. If you look back in the box further there should be a bundle of white wires hooked together, hook the white wire to them. If there is a bare copper wire in the box also then the green wire should be hooked to that.

Dec 04, 2010 | Garden

1 Answer

I am replacing a single pole light switch. The original one is older and had a black and a white wire screwed into the side and a black and red wire poked into the back. Where do these wires go in a new...

Most single pole light switches that you buy now days have a quick connect feature. The wire is shoved into the back hole after skinning and the gripper teeth keep it from coming loose. This was to make the wiring job faster for the electrician. It also has side screws so that you can run multiple wires if you need to. I suspect that your new switch is just side screws (which you can buy). I do not know why you have a red wire as that normally is used in a three way switch. Are you sure that you don't have a three way switch, that is you can turn the light on or off at two locations. Check out

Nov 28, 2010 | Sylvania G-Netbook

1 Answer

L1, 2 and L3 versus COMM

what kind of light switch are you replacing??? assuming house light switch???
one way or two way switch??
I have not come across the type of switch before.
L1, L2 is just label as line 1 and line 2, comm is usually refer to common (ground wire-white).
is the red wire-hot???

Oct 23, 2008 | Electrical Supplies

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