How do you tell if your pickups are shot? I've got a warwick corvette and all of a sudden my bass started sounding a little distorted mainly in the lows. I put a new battery in to no avail. new strings still nothing. and the whole thing just plain sounds a little dead. it's happening with both pickups. how do you tell if your pickups are going bad, I can;t seem to find much on google about it.