FV-1 Wiring Diagram

[fender3x]

I don't see a wire that looks like it comes from the bridge. This would usually be from one of the posts. Easy to check without opening up the control cavity. Plug in a short cable, and put a test lead from an ohm meter on the shaft of shaft of the jack that is not plugged in. Put the other test lead on a string. If the meter jumps your bridge is grounded. If it doesn't jump, then try putting the lead on the tip. If it jumps the bridge is grounded but the jack is reversed. Since your pickup covers are metal you can use the same test to make sure each pickup shield is grounded.

Also, you might add some shielding. Even with humbuckers you can get noise when unshielded.

[m0j0]

I don't see a wire that looks like it comes from the bridge. This would usually be from one of the posts. Easy to check without opening up the control cavity. Plug in a short cable, and put a test lead from an ohm meter on the shaft of shaft of the jack that is not plugged in. Put the other test lead on a string. If the meter jumps your bridge is grounded. If it doesn't jump, then try putting the lead on the tip. If it jumps the bridge is grounded but the jack is reversed. Since your pickup covers are metal you can use the same test to make sure each pickup shield is grounded.

Also, you might add some shielding. Even with humbuckers you can get noise when unshielded.

Thanks Fender,

It is grounded, it's the black shielded cable that runs right through to the jack. Tested with multimeter and that's all fine. It did occur to me that I hadn't shielded the pickup cavities which I'll try to do today as I do have a roll from the last build where I also forgot about shielding those cavities :-D
That, plus fixing the switch grounding and moving the bridge grounding connection to the back of one of the pots and hopefully it will be sounding better soon.