Why won't my turn signal work?!

What is your question?

The front left turn signal and side signal indicator don't work at all. The rear left turn signal blinks fast. The left turn signal light stays on all the time. I've replaced all of the bulbs, sockets, turn signal switch, headlights, relays, fuses, and nothing is working. My brother and uncle both have replaced the wiring that goes to the socket on both front and rear. What else could it be?

What makes this problem better or worse?

Nothing

How long has your 2005 Ford Focus had this problem?

at least two years