P bass problem
 

I've come accross this 76' P bass and the tone knob controls the volume, and the output sounds weaker than any other bass I plug in to the amp. I followed the schmatics for the bass and made one change. It did not make a difference. Can someone tell me what is wrong.

Thanks much...

First off what change did you make?

Precisions have one of the easiest wiring schematics to fix and install, so it should be easy to repair for not a whole lot of cost. But without a bit more info, its hard to diagnose.

Find out if when messed with in the past the volume and tones pots weren't changed for different values that are unsuitable.