Just a few questions....
1. Does it hum when your hands are on, or off the strings, or just all the time?
2. Any loose wires?
3. If you have a multimeter, do you have a ground from the bridge to the pots and control plate?
SBMM Ray35, Ibanez ATK300, Fender Modern Playa Jaguar, Squier VM Jazz V, Mesa Walkabout Scout