I finally solved 99% of my Jazzmaster's noise issue. I have used foils, grounded everything and still had a lot of extra noise. I bought an aluminum pickguard shield-it's a real Fender part- Around $20. It works! I also have a Jaguar and it is pretty quiet. They are similar so I started trying to understand the why the Jag had less noise. I determined that the Jag's controls are attached to metal plates. So I figured the pickguard shield was the ticket and it was. Strongly recommend this fix to all Jazzmaster owners.