Originally Posted by Shern

My driver's side corner light is having issues. The turn signal filament of the bulb works fine (can signal turns), but the running light filament works only intermittently (it's not burnt out). I tried sanding the contact points, and got the whole bulb working, but an hour later I checked and it had gone off again -which leads me to believe it's temporary function was a coincidence.

Is there another point I might try cleaning?

I've read that the hazard light switch in the shifter console controls the turn signals but does it also control the running corner lights or there a separate relay?