Defender TD5 Deployable Steps have lighting issues

If you've been watching my videos you would have noticed I have a Land Rover Defender TD5. I've fitted deployable side steps to it a few months ago and up until a few days ago everything was fine. Well now it's not. It looks as if , no hang on, why not watch the video and I'll explain what I found? ... https://www.youtube.com/watch?v=5dFkxFdmxec