Two gang light switch - what am I doing wrong?

[CountryFan]

Does this help?
View attachment 423127

View attachment 423128

You have a blue sleeved brown which is Live at the ceiling, so perhaps the same at the switch, but not sleeved?

 

[AFT4B]

First of all do you have any test equipment?

Multimeter - volt stick - LED or neon screwdriver?

Yes, I have a volt stick, but have today bought a multimeter as well

Second, has it ever worked or is it new?

The way the switch was wired, only the light in the room worked. The light in the loft didn't work.

 

[AFT4B]

You have a blue sleeved brown which is Live at the ceiling, so perhaps the same at the switch, but not sleeved?

As per the photos - there isn't a blue sleeved brown wire at either the ceiling or the switch. The electrician wasn't particularly keen on marking wiring unfortunately (even though I asked him several times).

 

[pete01]

Is it 2 lights this switch should turn on and off?

Turn all the power off and test continuity between each brown and blue and brown and blue marked brown in the light.

 

[CountryFan]

Does this help?
View attachment 423127

So, this isn't your photo?

 

[SUNRAY]

In the ceiling rose the brown sleeve is hidden but visible.

If you are convinced the cable marked SW is this cable

and the brown is the perm live you mentioned earlier, try joining the blue and brown together.


If that doesn't work, as in light the bulb, check the voltage is around 230-240 at the points shown with red arrows.

(meter set to AC volts at a range higher than 250V, such as ~300V or ~600V)

Do any other lights not work because of this?

 

[AFT4B]

Is it 2 lights this switch should turn on and off?

Turn all the power off and test continuity between each brown and blue and brown and blue marked brown in the light.

Yes 2 lights.

So, this isn't your photo?

Sorry, my mistake

 

[AFT4B]

View attachment 423148In the ceiling rose the brown sleeve is hidden but visible.

If you are convinced the cable marked SW is this cableView attachment 423152and the brown is the perm live you mentioned earlier, try joining the blue and brown together.


If that doesn't work, as in light the bulb, check the voltage is around 230-240 at the points shown with red arrows. View attachment 423153(meter set to AC volts at a range higher than 250V, such as ~300V or ~600V)

Do any other lights not work because of this?

So connecting these together does make the light come on. I assume that means the live is at the light, not switch as I had previously thought?

Lights in other rooms aren't affected.

I'm still confused why connecting them all together doesn't make both lights come on?

 

[pete01]

So connecting these together does make the light come on. I assume that means the live is at the light, not switch as I had previously thought?

Lights in other rooms aren't affected.

I'm still confused why connecting them all together doesn't make both lights come on?

View attachment 423157

So light 1 go into com and L1 of 1 switch.

Light 2 brown in the other L1 unknown brown in com 2 blues together.

Maybe the unknown cable isnt connected somewhere, in the consumer unit or another light or switch

 

[SUNRAY]

OF COURSE IT IS ESSENTIAL THAT ALL OF THIS IS DONE IN A SAFE MANNER.

First measure for any voltage on the unknown cable - hopefully see 230-240V

If nothing
Test between the unknown blue and the Perm live - hopefully see 230-240V

If so, try this

EDIT: Looks like Pete beat me

 

[SUNRAY]

What we haven't asked:

Can you trace where the cables run to?

2 are obvious: to light 1 rose and light 2. the 3rd 'unknown cable' I'm assuming/hoping goes to another light or a junction box for a permanent neutral and ideally a live too.

 

[AFT4B]

OF COURSE IT IS ESSENTIAL THAT ALL OF THIS IS DONE IN A SAFE MANNER.

First measure for any voltage on the unknown cable - hopefully see 230-240V

If nothing
Test between the unknown blue and the Perm live - hopefully see 230-240V

If so, try thisView attachment 423159

EDIT: Looks like Pete beat me

So joining the spare blue to the "light 2" blue and brown to brown doesn't seem to have any affect. There is no voltage in the "spare" either.

None of the other lights on the ring/ other rooms are affected - they all work as they should.

I've re-wired the plug to how Pete suggested - and this is how it was originally wired too.

But the same problem persists. Light one works from the switch, but light two doesn't work.

 

[pete01]

Is the right hand switch the blue and brown from the same cable? (Light 1)

 

[SUNRAY]

That's a shame, I really thought we were on a winner.

Did you check this bit?

OF COURSE IT IS ESSENTIAL THAT ALL OF THIS IS DONE IN A SAFE MANNER.
...
Test between the unknown blue and the Perm live - hopefully see 230-240V
...

any thoughts on this:

...Can you trace where the cables run to?

2 are obvious: to light 1 rose and light 2. the 3rd 'unknown cable' I'm assuming/hoping goes to another light or a junction box for a permanent neutral and ideally a live too.

 

[morqthana]

Is it just me, or does this look a bit iffy?