the right front turn signal/daytime running light went out this week. Tried 3 different bulbs from 3 different places. Last place was from a Toyota dealer. Nothing works.
its almost certainly the socket, i had the same issue. dealer has them but be sure to specify whether you have DRL's or not because the part is very different
a few inches up from your headlight connection is another main connector, spray that with some Electronic Cleaner. I need to do that every few months, espically in winter.