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I have a one gang two way switch on top landing, there are four red wires one yellow one blue how do I wire the switch?

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Was there a switch previously installed? Are any of the wires connected together? –  Tester101 Nov 8 '13 at 18:07
Is this a NA 2-way (single pole single throw, one switch per light) or an EU 2-way (single pole double throw, two switches, either turns on light, called 3-way in NA)? –  gregmac Nov 8 '13 at 20:21
Both switches should turn light on but if down stairs switch is on I can not switch off upstairs and vica versa –  Arthur Jennings Nov 10 '13 at 13:57
It's unclear what your starting condition is, and what you are trying to change. Without that your question is not really answerable. –  Bryce Nov 13 '13 at 7:52

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