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Hopefully there is an electricity boffin out there who can help with what to you might seem as an easy problem to solve. Unfortunately it's got me baffled.
I recently tried replacing 2 wall lights and a ceiling light.

When I removed the old ceiling light I thought I had grouped the wires together in exactly the same way.
There were 3 cables connected to the old fitting but unfortunately I'm not now sure if I have them grouped together correctly as the light won't work.
2 cables have 1 BLACK, 1 RED and the other has 2 REDS. All 3 cables have another wire that doesn't have a sleeve but they have been grouped together using GREEN insulating tape.
The 2 REDS and 2 BLACKS are connected together. The other 2 REDS are seperate from the others but are also grouped together.

The wall lights are seemingly straightforward to reconnect. There are only 3 wires; RED, BLACK ,GREEN/YELLOW (E,L,N ) So deciphering where each goes on the new light fitting appears simple Red = Brown, Black = Blue and Green = Green. However they won't work either.

At the moment none of the new fittings are in place as none work.

HELP!!

This question has been asked over 80 times in 3 months. Please do what is advised and visit our projects section where, in the many electrical projects there, the answer is demonstrated safely.

Hi as DOC says this is all too familiar a post, however yours is interesting as wall lights don't appear to be connected to centre light so should work on own switches?
Centre light : The cable with the twin reds in is from your switch, one red should go with other 2 reds in spare term. block [not connected to light fitting], the 2 black[neutrals] should go to Neutral of light[blue], the remaining red from twin red should go to Live of fitting [Brown].
look at project' ceiling rose wiring for pictures,
regards SPARX

RAYO
get a sparky in to check things over.

BLAKEY1963

Thanks for your help lads.