K12 front side lights not working

[mido999]

My front side lights on the K12 aren't working. I've replaced both the bulbs and checked the fuses underneath the passenger headlight and they're all fine.

What could the problem be?

 

[Sparky2018]

Check contact points for bulbs the bulb holders.
Might be they been damp and then cause corrosion.
Look for white or green colour on the contacts and wire's.
Other than this check ground points.