My light fixture has stopped working. It's not the bulb as i've changed it and also tested the live feed with the switch on, there seems to be no power coming to the light. I also have an extractor fan on the same switch, so when the light goes on the extractor goes on. However, the extractor is also not going on. So I am assuming the power from the switch is probably looping through the extractor and the extractor might be the faulty item. I've never wired an extractor, do extractors usually have a loop? can I get a replacement?