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I am replacing a old turn knob dimmer with a new dimmer. The new dimmer has 4 wires, a red, a white, a black and a green.

My old one is wired up with two red wires and a black wire, in the junction box there's two white wires and a ground.

How should I wire the new dimmer up to a junction box that has two white wires and a ground?

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    Can you post photos of the inside of the switch box involved please? Mar 13 at 20:40

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