Switch Position Humbucker Pickups

This is a 1.81 minute video response from Nick Greathouse on Nov 1st, 2008

Question:

"swhan asks, "Hi, I play a Yahama ERG121C. It has 2 humbucker pickups separated by a single coil. I'm trying to figure out what each position of the 5 position switch does. Any help is greatly appreciated. :) Stephen""