This is a fun harness but may seem confusing at first.

Treble Position

In Treble position you can use 3 of the controls.

Bridge Volume-Coil Cut- When this control engages it changes the Bridge pickup from a hum canceling humbucker to a single coil

Bridge Tone-Phasing- When you engage the Bridge tone you flip the humbuckers wiring. the Hot Output becomes the Ground, the Ground becomes the Hot. The sound now passes through the pickup in reverse.

Neck Tone-Kill Switch- When you engage what would be the Parallel in Treble position you get a cool Kill Switch/Output Limiter

Middle Position

The Middle Position is the most versatile when using the controls.

Volume Controls-Coil Cut- When these controls engage it changes the pickups from a hum canceling Humbucker to a Single coil and even a giant humbucker.

Bridge Tone-Phasing- When you engage the Bridge tone you flip the Bridge humbuckers wiring. the hot output becomes the ground, the ground becomes the hot. The bridges sound passes through in reverse of the Neck pickups.

Neck Tone-Parallel- When you engage the Parallel you hear the 2 humbuckers turn into 4 single coils creating a more fuller sound

Rhythm Position

Rhythm position is limited to only 2 controls as it allows you to use the Neck Volume, and Neck tone.

Neck Volume-Coil Cut- When this control engages it changes the Neck pickup from a hum canceling Humbucker to a Single coil.

Neck Tone-Parallel- When you engage the Parallel you hear the Neck humbucker turn from one big coil to 2 Single coils creating a more fuller sound

Test around and combine these Position to create different sound.