Quick run down: I am fnord-- exploring newb. I have a J Bass type, 5 string, passive emg blades. The only problem is noise: call it buzzzzhiissss. It goes away when I put a finger on any of the three knobs. Full disclosure: recently threw a wire from the tone pot, learned to solder and fixed it, and some noise went away. I don't want to pull all the guts for a shield job until exhausting all avenues. How do I test if my grounds are grounded? I have ohm meter, but don't know where to put the black and red wires to do any kind of trouble shooting. Any advice would be appreciated, fnord!