Ka full beam only works one side

[howcanshe]

Feel like I've checked everything here but still not working.....

Drivers side full beam wasn't working so changed bulb, still no luck so checked fuse. This was fine so swapped bulb from passenger side to check bulb wasn't faulty, worked fine in passenger holder.
Took fuse box out and swapped over one of the relays, not a faulty relay. Took apart the clip that goes into the back of the bulb as this could have rusted, looks fine.

Anyone have any idea what I can check next??

Don't think it is anything to do with faulty ground as all other bulbs still work