I recently bought an old battered no-name precision off of Fleabay to relic and use as a back up, however as can be the case with eBay, there's an issue with the electronics, there's only a buzzing sound when I plug in! As a disclaimer, I'm an absolute amateur when it comes to electronics, no knowledge, so excuse any stupid or blatant things I say. I looked up a wiring diagram and compared it to what's actually present on my bass and it appears that the Tip (hot output) is connected to the inner portion of the jack socket (should be connected to the outer I believe?) and that there is no wire (sleeve?) going from the tone pot to the jack socket. Also the ground wire is connected to both pots and the Jack socket (on the inner ring where the hot output should be), I don't know if this is correct?