if u got any ideas would be great
when i put main beam on there fine when u put full beam on the drivers side goes to dipped and the spot light dont work on the same side
I had the same issue on mine but I just put in an uprated loom as I wanted the headlights to be better anyway and this got round the issue...(couldt find out what the problem was)
I know thats not really the answer to your question but it is one of the best mods I've done on the car, really improving the headlights so I just thought I'd mention it.
Fire a post up if you do work out what was wrong tho....be interesting to know.