In the UK there is no such thing as a "standard colour code" for light switches. So unless you can identify what colour does what I am going to have to say "all anyone can do is guess" but guess and get it wrong......"
Also I have some "general questions"
Is your new switch compatible with your existing lights? (Some electronic switches have a minimum load)
Is your current back box deep enough to accept the round "module" and allow you to make connections and to add the new switch?
Your picture clearly shows a yellow wire (not just the green/yellow) can your lights be turned off from elsewhere too? i.e one switch one end of the hall and another switch at the other end of the hall.
I would also have to ask why are you replacing a switch with a different switch to control the same lights that the existing switch already controls?
Hi, Yes it is compatible with my existing lights. The reason why I'm installing a wireless switch is because the existing switch is nowhere near the backdoor to my house. I was going to move the existing switch over to the door but didn't fancy chasing wires through freshly plastered/painted walls.
There is only one existing switch that controls all 3 outside lights. So it's just one switch that turns them all on and off.
As you wish. It would appear that the "unit" is compatible with your lights. I would suggest you follow the supplied instructions exactly as they show. I am presuming the double blue is neutral (But you really should check it first) My only real concern is the "extra yellow wire" I have no idea what it is for or what it does or what it is connected to, it was the reason that I asked can you switch the lights off from another location.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!