To go between these three modes, the simplest trick is to use a 3-position on/off/on DPDT switch, wired as follows: However, by connecting the white wire, we are shorting out the P-90 side of the pickup and it will not be heard. This means the pickup is now wired like this:īy connecting the red wire to the hot output, we’re allowing the signal from the rail coil to become part of the signal. This gives us the P-90 mode.įinally, we can connect the red and white wires to the hot output of the pickup (the black wire). The white wire is of course also grounded, meaning the P-90 coil is now acting as a regular single coil pickup on its own. When this happens, both sides of the rail coil (green and red) are connected to ground, meaning the rail is taken out of the equation completely and can be ignored. Both pickups have been combined in series, so this gives us our series humbucker sound.Īnother option is to ground the red and white wires, while leaving them connected to each other. The path from ground to hot goes through the rail, then through the P-90, and finally out to hot. This means that the pickup is wired as follows: This combined red and white wire is now what controls our three modes.įirstly, it can be connected to nothing else at all. We can also solder the red and white together, as we’ll never need them to be unconnected. These connections will never change for any of these three sounds. Firstly we connect the green and bare to ground. We can do it by using standard humbucker wiring and coil splitting. If these are the only three modes we want to use, the wiring is quite simple. The three most-used modes for the P-Rails pickup are series humbucker, P-90 mode and rail mode. However, it’s unlikely that anyone who owned a P-Rails would want to do this. This does of course mean that we can completely ignore one of the pickups and wire the other in as if it was a single coil. In the previous part of this article, we saw that the P-Rails pickup can be thought of as two separate pickups, like this:
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