
Originally Posted by
DrNewcenstein
Strat-style 3-way blade switches generally behave the same way as LP-style 3-way toggles: the middle position is an automatic bridge between position 1 and position 3.
However, there are 3-way blade switches that require the middle position to be wired manually. While usually this is merely a jumper from the outer contacts to get bridge+neck, this separate center contact can instead be wired for one of many combinations, including parallel of either or both pickups.