How do the switches on the Mustang work?

The mustang switches are simple on/off switches which control the direction of current flow through the pickup it is positioned above.

switch in middle (off) position: -0-

switch in back (towards bridge) position: 0--

switch in forward (towards neck) position: --0

both pickupsoff: -0- -0-

both pickups on: 0-- 0-- or --0 --0

both pickups on, out of phase with eachother: 0-- --0 or --0 0--

All nine of the switch combinations:

-0-  -0-  both pickups off
-0-  0--  neck pickup on (back)
-0-  --0  neck pickup on (forward)
0--  -0-  bridge pickup on (back)
0--  0--  both pickups on, inphase
0--  --0  both pickups on, out of phase
--0  -0-  bridge pickup on (forward)
--0  0--  both pickups on, out of phase
--0  --0  both pickups on, in phase