Camry :: 1999 - Brights And Right Front Turning Signal Not Working?

I have a 99 Camry and have two issues:

The brights don't work. After doing some research, I reached the conclusion that it is the dimmer relay, however I noticed that upon unplugging the relay, the regular headlights don't work until I plug it back in. Does this mean the relay is good, or is it just that the car is set up in such a way that if the relay isn't there, working or not, the lights won't come on? I know you can test it with a voltmeter, but I don't have one and the relay doesn't have a wiring diagram on it, so I'm not sure which two of the four plugs you'd use to test it. Worst case, I'll buy one off ebay and just send it back of it doesn't work, I just wanted to ask before I did that.

The front, right turn signal does not work. I tried a new bulb, that didn't work. The rear right signal works fine. I was told to try using tweezers to pull out the tabs in the socket in case one was stuck somehow and not making contact, but that didn't work. Did some research, but this is apparently a fairly rare issue. Someone suggested I get a metal file and file off the tabs to remove corrosion, so I wanted to get a second opinion on that, plus I'm not sure how to go about doing that. There is no easy way to pull the socket out, far as I can tell (unlike the headlights), though I suppose I could try without undoing anything if I really had to.