Another one for anyone who is around. Replacing extractor in en suite. new one has 2 connection live and neutral. Wiring for the old one has 2 lives and one neutral. I have tested and one is a permanent live and the other a live switched through the pull cord with the lights. Does this mean the old one had a delay timer ? Can I simply connect the new one to the switched live and isolate the permanent liv3. Any advice greatfully received.