In article ,
Archibald Tarquin Blenkinsopp wrote:
On Sun, 27 Jan 2019 14:15:40 +0000, John Rumm
wrote:

On 27/01/2019 10:46, Archibald Tarquin Blenkinsopp wrote:
On Sun, 27 Jan 2019 10:36:11 +0000, ss wrote:

Light switch 2 gang both are 2-way.
The stair switch works ok at the top of stairs, at bottom stairs it only
works dependent on the position of the upstair switch.
I opened up and there appears to be a loose wire, can someone please
confirm that the yellow wire is needing reconnected as per image.

https://imgur.com/a/pnUTTWQ

No I cannot anyway! Try prayer, or an oija board.

https://circuitdigest.com/sites/defa...ire-method.png

That is a deprecated way of wiring a two way switched system, and also
as evidenced from the use of 3&E in the OPs photo, not what is being
used here.

The more appropriate diagram would be the second one in this section:

http://wiki.diyfaq.org.uk/index.php/...tching_circuit

Hard to say how it is wired, I have never seen yellow used in a
lighting circuit, I can only assume the cable was left over after some
ancient three phase control project.

the three core (+ECC) cable I bought in about 1980 (for 2way switching of
lights) certainly had yellow as one of its cores. Blue & white for the
other two.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle