I asked a builder to replace a plaster-board wall, and to do that he disconnected the light switch. When he reconnected it, he seems to have connected it up wrong. It was one of those switches for a hall light, so that you can switch it on/off at two locations.
It ought to be simple enough to sort out, but the builder got into a panic and seems to have reconnected all the wires at random, including opening the ceiling rose and possibly fiddling with the wires there.
Of course, all the wires are buried in the walls/ceiling and none of them are colour coded correctly any more. I think the original wiring may have been done quite a long time ago.
I feel I ought to be able to sort this out myself, as I have a degree in Physics.
Is there a normal layout for these switches, as it seems to me there could be more than one way of wiring it to achieve the desired effect?
Is there a trouble-shooting guide?
I suppose I could start off by producing a chart of what happens when the lights are switched on/off. In a nutshell, the light can be switched on at either switch, but then it has to be switched off again at the same switch.
The builder put a new switch on the new wall. I have checked that it has a common and two other contacts marked L1 and L2. This looks like the right sort of switch to me.
Anyway, any help would be appreciated.
Thanks
Geoff