Ceiling light fitting HELP !

[Joetabs]

Hi,

I’m moving into a new house, that has old electrics in that work /worked fine. I asked a friend who is a qualified sparky to come and change a few ceiling roses over as they were dated and just dirty. He has had issues with one of the bedroom lights as it is looped from the bathroom and bedroom next door. Before he changed the fitting over it worked but now it doesn’t and will not turn on. He says he has “tried” several different ways of fitting it but it either wont turn on or blows the fuse. Any help/ advice would be great. I’m currently training in electronics so do have a bit of knowledge of how it works but not complete knowledge of how old wiring works. I’ve attached photos of the ceiling rose and the wiring in the light switch. I’ve spoken to another sparky and he seems to think there is a junction box somewhere else.

 

[ericmark]

Move single red in ceiling rose to be with other two reds

 

[Adam_151]

Three reds to the middle terminal labelled loop.
Now assuming that in its current state, Nothing tips when you switch the light switch, all your other lights work, but this one does not. Then:

The two blacks together (currently on the right) need to go in the neutral terminal with the blue of the flex and be terminated better than they are.
The black on its own (currently on left) needs to be identified with red sleeve and go in the live terminal with the brown from the flex
(it would work with them transposed, but wants straightening out)
(hence the number of terminations in each plate....)

Your mate isn't a qualified electrician btw

 

[terryplumb]

You need to do some testing to establish which is the switch cable,and therefore which of the black wires is the switched line . Your" qualified electrician" is an idiot if that's his wiring in your pic ,and he can't work out the fault.

 

[flameport]

I asked a friend who is a qualified sparky

They are not.