Quote Originally Posted by WeirdBits View Post
Jack plate was my first thought too, plug goes in and shorts the hot arm/tip onto the shielding. Or, if your control cavity is a fraction shallow then switch lugs and/or its solder blobs could brush the shielding on the bottom once the scratchplate is screwed down tight.
My sentiments exactly.... If you feel you have wired it right then these are the first two places to look as they are the two most common 'drama spots'...