I have a problem with my top landing light, it doesn't work! It is a typical setup double switch downstairs and the same upstairs. I have replaced the cieling rose and lamp connector, still no joy. I have checked the wiring at the rose, there is 1 red and earth in the same outer sleeve ( switched live) and 1 single black (neutral) and then the lamp cable. When the switch is on then the red cable is live and the black not, same at the lamp holder BUT when I put the bulb in the black cable becomes live too and the light doesn't work! All other lights in the house work fine including the downstairs hall light.
Hi your neutral (black ) core is disconnected somewhere else probably the previous fitting on the circuit. This is why it reads live with lamp in place as there is no return path. Did you touch another light also? or can you trace neutral in loft, maybe to a joint box or next light and check connections there.
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