Need help understanding an RC high-pass filter

[McCreed]

Why do you have a 500K resistor in parallel with the capacitor?
What is the value of your volume pot?

I’m using 500k pots, and with a 4 conductor humbucker, the parallel RC is in series with the north and south coils.
With my limited understanding of electronic principles, I can’t tell you why what goes where, but I have followed schematics that show this configuration and placement.

I’ll post the drawing later. I’m away from my computer atm.

[Simon Barden]

I’m using 500k pots, and with a 4 conductor humbucker, the parallel RC is in series with the north and south coils.

I think you mean CR (capacitor series with the signal, followed by a resistor to ground), as an RC (resistor in series with the signal, followed by a capacitor to ground) is a low pass filter. CR and RC are standard filter descriptions in electronics, so it's important not to get them confused.