Hi, just needing a little help, problem with downstairs light not working, worked for years previously, have no live feed to switch or light connections so I'm guessing that we must have a junction box somewhere & radial wiring so a loose connection in the junction box?. Have 2 red wires into the switch and 3 wires into the light rose. Am I right if so is my only option to either take up the bedroom floor difficult as built in furniture or cut a section of plaster board out of the ceiling, but how do I locate the junction box to minimise the work to rectify, heard that wire detectors are not very good. Thanks and appreciate any help.