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Thread: Light Switch - Not sure what to do

  1. #1
    DIY Member coopns's Avatar
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    Default Light Switch - Not sure what to do

    I was changing the old light switch to a new white one. The old swtich has two black and a red wire. The new light switch has just two screws brass right?

    I included some pic's of the old, new and inside the box.

    And...does it matter where I connect the white and black if only two brass screws are on the new switch?

    Please advise.

    Thanks.
    Last edited by coopns; 12-20-2009 at 05:52 PM.

  2. #2
    Jack of all trades frenchie's Avatar
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    3 screws generally means a 3-way switch. Is there another switch, somewhere, that also controls that light?
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  3. #3
    DIY Member coopns's Avatar
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    There is. So I would need a 3 way switch?

    And, as I asked earlier, does it matter where the black, red go on the switch...black to brass, white to ?

    Thanks.

  4. #4
    Code Enforcement codeone's Avatar
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    Quote Originally Posted by coopns View Post
    There is. So I would need a 3 way switch?

    And, as I asked earlier, does it matter where the black, red go on the switch...black to brass, white to ?

    Thanks.
    Its hard to tell by your pictures, however on a three-way switch there is a common screw. It looks as best as i can tell the black goes on the common scerw. That is from you pics.
    Last edited by codeone; 12-20-2009 at 06:51 PM.

  5. #5
    Code Enforcement codeone's Avatar
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    This looks like what you have as best as I can tell
    Attached Images Attached Images  

  6. #6
    Electrical Contractor Jim Port's Avatar
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    When you get your new 3 way switch, move the wire from the black colored screw to the odd colored screw on the new switch. Now move the other two wires to the other screws on the new switch. These do not matter, only the odd colored screw matters.

  7. #7
    Moderator & Master Plumber hj's Avatar
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    Default switch

    IF your switch does not have the words "on" and "off" on it then you have a 3way switch and it DEFINITELY matter where you connect the wires to it. The two from the bright screws have to go to the new bright screws but can go to either one of the two. The dark, "common", screw is either the hot wire to the switches, or the load wire to the light, regardless of what the wire color is.

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