Considering that this is your first strat style guitar, I am going to assume that this is your first experience with single coil pickups.. What you may actually be hearing is the inspiration for Seth Lover's invention of the humbucker.. That annoying single coil hum.. If you have had any humbucker that was coil tapped, this doesn't happen because of the opposing magnets in the humbucker.. See if this diagram helps you any, but it may take a bit of detective work to translate any color code differences.. The second link gives a lot of options if you are looking for something interesting.. Good luck and hope these help...
http://www.seymourduncan.com/support/wi ... S_1v_1t_5whttp://www.dimarzio.com/support/wiring-diagrams#1-5-5-3