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Anonymous Posted on Mar 02, 2010

The task was to replace a bathroom vanity light. Before removal of the old light, the dimmer switch worked correctly. I didn't touch the dimmer switch. After removal, the wall wires consisted of two white wires spliced together, two black wires spliced together and a red wire. My problem is I don't recall where the red was attached in the old installation. The new light has a white wire and a black wire along with a ground. The instructions that came with the new lamp say connect white to white and black to black. There is no mention of a red. When the circuit breaker is turned back on - the light is on and won't turn off by the switch. Next, I attempted ton include the red with the black but got the same results. My next attempt is to include the red with the white. Will this cause circuit breaker box damage? I haven't dared attempt this connection yet. What is the wiring diagram to make this work? Thanks, alan jones

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  • Master 3,940 Answers
  • Posted on Mar 02, 2010
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Alan

Generally, 3 wires indicate a "3way" switch where you have 2 switches at opposite entrances to a room. Both the Red and Black Can be hot, depending on the other switches position. But, a red wire would normally only be found at the switch box not the light.

What I'd suggest, is that you get a multimeter, and use it to determine the hot wire and the ground/neutral. Once you know which wire is hot, connect the hot to the black lead, and ground/neutral to the white lead of the light. That is the only SAFE manner I can see to resolve this.

  • Cornise Jan 01, 2011

    Question regarding the original message copied below...I am having the exact problem...to the last word. Did you find the solutions?
    __________________________________________________________________

    The task was to replace a bathroom vanity light. I am wondering if you found the solution and if you mind sharing what you did to get the dimmer/lights to properly work.

    Before removal of the old light, the dimmer switch worked correctly. I didn't touch the dimmer switch.

    After removal, the wall wires consisted of two white wires spliced together, two black wires spliced together and a red wire. My problem is I don't recall where the red was attached in the old installation.

    The new light has a white wire and a black wire along with a ground. The instructions that came with the new lamp say connect white to white and black to black. There is no mention of a red.

    When the circuit breaker is turned back on - the light is on and won't turn off by the switch.

    Next, I attempted ton include the red with the black but got the same results.

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