Re: 2 way switch fault

[philserre]

I have replaced a pair of old 2 way switches with new ones. There are only 3 wires going into each switch. One each thin black and red and one thicker red. I can only switch on and off from one switch at a time. I have copied the original switch connections although the layout of the new sitch is different to the old. (Old switch 3 connections vertically in line, new switch one conn at the top and two below side by side). I'm assuming the common connection is correct and have tried switching the L1 and L2 connections on one switch but this has no effect. Any advice would be appreciated thanks. Phil

 

[Spark123]

Why do you assume the common connections are correct? How have you connected them? Are the thicker red wires in their own cable whereas the red/black part of a twin and earth? It could be the red/black wires are strappers, have you tried these in L1 and L2, the thicker red wires in the common terminals? How were the old switches connected?

 

[philserre]

I have now sorted it. Took all the wires out and identified the live feed using the wiring diagram for 2-way switch using 3 wires only from tlc.direct.co.uk (Sticky link). Popped the live feed in then switched on and off to identify what's connected to what and connected the rest. Also noticed that the landing light was connected to thick red wire. Thanks for your interest. Phil

 

[Taylortwocities]

Thanks Phil. Its nice to get feedback when a problem is solved. All too rare.

TTC