I have a Schecter bass that my bass player uses. It works fine but it has an odd problem. Only one of the pickups seem to work at a time. For example, sometimes the bridge pickup works perfectly fine, but when you switch to the neck pickup, it drastically loses volume, gain, and overall sounds like poopie. Even weirder, it seems like this problem randomly switches between the pickups for some reason. Like sometimes the neck position sounds like this, sometimes the bridge does. Ideally I'd like to have the neck pickup selected at all times since it sits much better in the mix in that position. Is this some kind of wiring issue?