Something missing, normally two way wiring you take the switch wires to one switch, to L1 and L2 then you take a triple and earth cable to next switch, which is wired like to like, the important wire is the com, if the other two are swapped it does not matter, as long as the com is correct, with an intermediate switch you simple consider the side where only one terminal used as the com.
However you don't have any switch wires shown, there is no reason that the triple and earth should not go to the ceiling rose and in the ceiling rose you have an extra connector for the com, but since no picture of the ceiling rose we don't know what colour cable has been used for com.
So look in ceiling rose, the com does not connect to lamp. So L1 and L2 go to line supply and line to lamp if they are swapped it does not matter, com goes only to com on the other switch, and with an intermediate switch to the terminal on its own.
Why buy an intermediate switch when you only need a two way? To add third switch it goes between L1 and L2's on the two way switches, and in essence swaps it so L1 to L1 and L2 to L2 becomes L1 to L2 and L2 to L1 you can add as many as you want.
thanks for the reply i have 3 switches that control the top landing (These work fine when i wired them up with the intermediate switch)
3 switches to control middle landing i wired it up the same way, i did the top landing but the bottom landing light switch seems to be affecting the switch. if i turn off the bottom landing switch then the middle landing works fine when you switch on and off from the top and middle.
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!