The guitar pickups are represented by the three current sources for Neck, Middle, and Bridge and the two light emitting diodes represent our outputs, in this case, I'm sending to a two terminal preamp designed for 2 pickups.
The switches can be standard 3 way toggle pickup selector switches.
With the neck sent to Terminal 1 with switch 1, the middle or the neck can go to Terminal 2.
When switch 1 is set for middle to terminal 1, set switch 2 to send the bridge to terminal 2.
If both switches are set to send the middle pickup, you get half the current at each terminal from pickup 2.
