As a gigging musician, you are faced with a problem .How are you going to cover different sounds of different guitars using only a single guitar? The answer is Guitar Coil Splitting. So what is guitar coil splitting?
Single coil pickups have a distinctive sound which is different from a humbucker pickup. It is brighter and cleaner than a humbucker. There are songs composed with single coil pickups as well as humbucker pickups. As a gigging musician who covers these songs, you have to give justice to the guitar sound to both a single coil and a humbucker.
When it comes to a situation where you must have a single coil pickup on a humbucker equipped guitar, the only way to do it is by coil splitting.
A humbucker pickup is composed of two coils wired in series as default. Most new humbuckers have four wires. If you want a single coil out of a humbucker all you have to do is ground one coil (connect both positive and negative to ground thereby eliminating that coil from giving an output to the guitar sound) You must be able to select any of the two coils as one will not sound the same as the other considering their location on the guitar.
Another interesting wiring modification is making the humbucker pickups into parallel mode. It produces a sound in between a full humbucker and a single coil. It has lesser output but more highs and much cleaner than a full humbucker. It will not produce hum as a single coil.
My favorite wiring modification on a two humbucker equipped guitar is by using two push-pull potentiometers and a three-way pickup selector switch. This way I can play full humbucker on the bridge pickup , full humbucker on the neck pick up , or full humbucker on both pickups, depending on the three-way pickup selector selection.
If I pull both push-pull knobs, I can play parallel humbucker on the bridge pick up , parallel humbucker on the neck pickup or parallel humbucker on both pickups , depending on the three-way pickup selector selection.
If I pull the aft push-pull knob , I will have a north (closest to the neck)single coil on the bridge, north single coil on the neck or both north single coils,depending on the three-way pickup selector selection.
If I pull the forward push-pull knob , I will have a south (closest to the bridge )single coil on the on the bridge , a south single coil on the neck or both south single coils ,depending on the three-way pickup selector selection.