Passenger side light not working

[stonecrow]

Hi, I bought some custom devil DRls for the FF mk2.5 a while back, but noticed last week that the left side -side light went out, ive tried fuse changes and returning the headlight and getting a replacement but the new one still didn't work, there's no lose wires (that I can find), I've read it could be relays or the light switch on button but wouldn't these have both lights out not just one side? im currently trying to get it booked into a garage but thought id try everything I could first..