Just when you think you've fixed one problem it creates another one. :roll: Now when you switch on the light it cuts the power supply thru to the burglar alarm which is the next appliance in the loop, although everything else upstairs still works. This is how I've wired it up:- Line - the single red...
Downstairs switch just has a red and a black wire. Upstairs switch has a red and a black wire plus what looks like the other end of the grey cable with the red core.
I am trying to fit a new light fitting but can't seem to get it to work. The light in question is the main ceiling light, it has the usual 3 grey cables with red, black and green wires plus a 4th grey cable with a red core. The light can be operated from either of 2 switches, one downstairs and the ...
