Broken Bulb light but no broken bulbs

[Frogmella]

I have a dashboard warning light and fast-flashing nearside indicators. The front bumper direction indicator lamp is not lighting which I assume causes the fast flashing of the others due to insufficient load.


The bulb is fine, it's quite new, but I replaced it with another new one from the pack I bought recently anyway. I have cleaned all the contacts using a cut down nail sandboard and then with contact cleaner but the problem persists. I have checked all the other bulbs and only the front bumper indicator is failing to light.


Any ideas about where/what to check next?


Thanks in advance.