Been there, the pickups literally have no identifying marks on them at all.

I know it's a switch, I know it has two positions, but I'm unsure of it's purpose (not sure I ever did, I traded a Rockford Fosgate amp for the guitar about 10 years ago), it either switches from pickup 1 to pickup 2, or turns one of the pickups off... then again I could be totally wrong about that. I think that blue wire has been disconnected since I've had the thing... It pretty much sat in a corner as I have my main guitar that I won't be taking to Iraq with me