Im trying to replace a dimmer switch with a normal light switch. the dimmer was part of a two way switch system with a normal switch on an upstairs level. The wiring to the dimmer has 2 red, 1 black, 1 blue, 1 yellow and two earth wires. the new switch has 3 ports,1marked common, 1 one way and 1 two way. cab you help with what goes where?

elaine, February 2010

2 red wires to L1
black and blue wires to l2
yellow wire to COM
2 earths together in the earth terminal on the switch if there is one, otherwise in the backbox.

If that doesn't work properly, swap the blue and yellow wires around.

Adam, February 2010