Hi, I am trying to install a two way pull switch but things are not working out. The terminals on the switch are not labelled apart from the earth but I assume them to be L1 and L2 at the top and Com at the side. The wires are red (live), blue (neutral), green/yellow (earth) and yellow (?!?). As the old switch did work I assume that the yellow is switch live. However, when I connect Red to Com, yellow to L1, Blue to L2 the light does switch on / off via the wall switch until I pull the pull switch. On the assumption that yellow is not switch live but red is I also tried yellow to Com, Red to L1 but get the same result. Any suggestions gratefully received. Photo attached.
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