Peavey Cirrus 6 string eats batteries

Pull out the jack and make sure none of the prongs that contact the end of the cable are touching each other. Normally two of them (ring and sleeve) both make contact with the sleeve of the 1/4" connector, closing the circuit that powers the preamp. If they are touching when they shouldn't be, the preamp stays on all the time. In that case you might just need to bend them back into place.

 

Along those lines, if the terminal for the battery negative has gotten bent and is touching any shielding in the cavity that will keep the battery turned on.

Seems like if its a barrel jack, which a lot of Peaveys have, and more then a few years old, you’re better off to just replace the jack,