Noisy Jazz pup on PJ help?

[hooky_lowdown]

I have a new (to me at least) fender pj. The p soloed sounds great. The jazz soloed has a really loud buzz, much louder than typical 60 cycle hum.

 

The funny thing is if I turn the jazz volume down 50% or less either soloed or with p on full, the loud buzz disappears completely. I checked the wiring, there's no loose wires or bad solder joints. Any ideas why the jazz pup is so noisy when above 50% with p pup or soloed?

 

[PaulThePlug]

Dodgy Pot J Vol Pot?..

Howz about with the P on 50%?

[hooky_lowdown]

32 minutes ago, PaulThePlug said:

Dodgy Pot J Vol Pot?..

Howz about with the P on 50%?

P works perfectly at any volume. J works perfectly upto 50%, soloed or with p. Pots all seem fine, no static when turning.