I've replaced several lights in my house no problem, house is 70's build old wiring etc
My kitchen light had an old tube light that was on the way out so I bought an LED replacement.
When coming to wire it in there were 3 grey cables in the ceiling with the 3 earth's and 3 red wires twisted together. Then the black wires were two into the neutral and one into the live.
I copied this over to the new light and it doesn't come on at all.
But if I use only two of the wires it comes on if any other light on the downstairs circuit is turned on but its own switch has no effect?
I tried swapping the wires around the other way but that means the light is just permanently on and the other downstairs lights don't work. So leads me to believe the 3rd one I'm not using is the switched wire but if that's one the live side it just trips it out, on the other side it does nothing 🤦
Any ideas where I've gone wrong as I took a picture of the old light wiring before I took it off and it and just copied it which hasn't been a problem for me in the past, I can understand if I got them mixed up but it doesn't even work with other combinations it either doesn't work at all or stays on permanently etc
That's the old wiring, the new one Is just a block with live and neutral