Pick-ups with two coils can be connected in three ways: series or parallel or split (one coil)
Series and parallel use both coils of the pick-ups in the way that they operate as “humbuckers” (noise free), while split (one coil) will hum as single coil.
parallel is similar to a single coil (bright, dry)
series is similar to a humbucker (warmer, fuller, more power)
split is slightly different from Parallel, even more pronounced single coil features with V shaped sound, slightly cutted on the mids.
On all instruments:
Usually on our instruments we give the possibility of using the series-parallel connections thru push-pull knobs, volume is for neck pickup and tone is for bridge pickup.
Taos standard : the 3way switch is a series parallel switch for the bridge and neck positions pickups
in one side position all the pickups sounds bright in central position the bridge position sounds hotter (fuller and more power) in the opposite side position the bridge AND the neck pickups sounds hotter (fuller and more power). To visualize this is like having the following sounds of pickup configurations:
position1: 3 single coils
position central: humbucker at bridge and 2 single coils
position3: humbucker at bridge , single coil central, humbucker at neck.
On some models there are also some pictograph to help to figure out this.
This is indipendent from the 5 way shitch that works just as usual.