I've just put a new volume pot on my 78 Precision. The old one was a 500k and the correct new one is 250k. Consequently, the tone has changed, not as bright. Also I notice from the Fender website that there are different ways to wire things, for example, the capacitor seems to be in a different place on the '62 compared to standard precision. Does anyone know what difference this makes? Also, what should be correct wiring for S8xxxxx USA precision?
The picture shows how it was wired before which I think is wrong. Now it's as standard precision there's virtually no earth noise.