Strat: Bridge + Middle, Parallel, In Phase
Analysis:
In this position, we have the Bridge and Middle pickups in parallel and in phase. This is one of the standard Strat configurations when using a 5-way pickup selector switch, and is generally the next position from the bridge-only position. Normally this would be position 4, but I have wired it as position 2 because I had to put the switch in backward. Once again, if you mount the switch normally, simply reverse the leads coming from the neck and bridge pickups.Okay, let's look at the middle pickup first. It's output wires (both of them) lead to the Phase Switch. The dotted lines indicate the the outputs are the same as the inputs, that is, they phase is not reversed. We'll assume that the poles on the left represent the ground wire from the pickup, and right carries the normal signal output.
So, we can see that the ground wire is being directed to terminal zero of Pole 2 on the 5-way switch. The dotted line indicates that this is connected to terminal 2 (remember, we're in position 2). Terminal 2 leads to the common terminal on the left side of the Series/Parallel Switch. The dotted lines show us that in the Parallel position, this terminal is connected to the terminal in the upper left, and hence, to ground.
The other output of the Phase Switch (which carries the signal in the phase-normal position) connects to the terminal in the upper right of the Series/Parallel Switch. The hard-wired connection carries this signal to terminals 2 and 4 of Pole 4 and terminal 3 of Pole 3 in the 5-position switch. Since we are in position 2, we can see that the phase-normal signal from the middle pickup is connected to the output (terminal 3 of Pole 2 is not connected to anything, and has no effect). We can also see by the dotted lines in the Series/Parallel Switch, that the the common terminal on the right side of the Series/Parallel Switch is also connected to the output. Following this connection leads us to the zero-terminal of Pole 1, which is connected (see dotted line) to terminal 2, and hence, to the output of the Bridge pickup. Thus, our output consists of the outputs of the bridge and middle pickups, in phase, and in parallel, which is what we want.