SeanMack
New member
- Joined
- Sep 29, 2025
- Messages
- 2
Hey everyone, hopefully someone can help.
I'm helping decorating my buddies place and am changing over some light switches. Its a double light switch at the top and bottom of the stairs and a single light at the top and bottom of the staircase.
The house is an older style council build. I'm totally stuck - I asked chat GPT for help but its running me in circles. the old switches were already removed so I couldn't see the old layout.
The down stairs light socket has 2 sets of live, neutral and earth (red black and earth) showing - a spare yellow cable and a spare red.
The upstairs has the same 2 sets of live, neutral and earth and another yellow cable.
I tested the cables on my voltmeter and the downstairs spare red is the constant live feed.
When I connected the permanent live to the downstairs yellow wire the downstairs light comes on.
I connected the downstairs live to the live on one of the 2 wire sets to send a current upstairs and connected that to the upstairs yellow wire and the upstairs light came on - so i can confirm each switches yellow cable takes current to the light.
My knowledge at this point is a bit spotty on how to wire these back up - I have 2 double light switches both with COM1 COM2 L11 L12 L21 L22
I believe in the old set up there was a small bridging wire involved as I found one near the old removed switches.
can anyone point me in the right direction on how to wire this back up - i don't know if this set up is conventional as it was an older council build but it was working before with the prior set up.
I'm helping decorating my buddies place and am changing over some light switches. Its a double light switch at the top and bottom of the stairs and a single light at the top and bottom of the staircase.
The house is an older style council build. I'm totally stuck - I asked chat GPT for help but its running me in circles. the old switches were already removed so I couldn't see the old layout.
The down stairs light socket has 2 sets of live, neutral and earth (red black and earth) showing - a spare yellow cable and a spare red.
The upstairs has the same 2 sets of live, neutral and earth and another yellow cable.
I tested the cables on my voltmeter and the downstairs spare red is the constant live feed.
When I connected the permanent live to the downstairs yellow wire the downstairs light comes on.
I connected the downstairs live to the live on one of the 2 wire sets to send a current upstairs and connected that to the upstairs yellow wire and the upstairs light came on - so i can confirm each switches yellow cable takes current to the light.
My knowledge at this point is a bit spotty on how to wire these back up - I have 2 double light switches both with COM1 COM2 L11 L12 L21 L22
I believe in the old set up there was a small bridging wire involved as I found one near the old removed switches.
can anyone point me in the right direction on how to wire this back up - i don't know if this set up is conventional as it was an older council build but it was working before with the prior set up.
) 
