P/J wiring

[Grassie]

I'm useless at these things so forgive my ignorance...

Converting a P bass to P/J wiring: ground wire from bridge is obvious but I have a wire that was originally screwed into a spot just below the split coil pup. Is this still needed? No P/J wiring diagram I can find has another ground wire on it...

[Thunderbird]

As long as the bridge is grounded and all solder joints are sound I would not bother with the other wire

[tommorichards]

That sounds as if your bass has been shielded with either black paint or copper foil. This wire would have been used to connect the shielding to the earth to stop unwanted buzzing. 

Assuming that's what it's there for, I'd connect it to an earth point. A picture would also help to determine its use if its not the shielding thing. 

[Grassie]

The cavity was painted with shielding paint. I've had to route it out some more to accommodate a Ki0gon wiring kit. New shielding paint ordered. I will connect the shielding to the bridge earth.