Hello! thanks for responding. The PUPs are single coil SD's. I've attached a pic of the installed pickguard to this message so you can see what they look like. There is no info other than the Seymour Duncan signature. All of the PUPs work fine and sound great. However, when I pull the knob up in any selector position, it's not turning the bridge PUP on with either the middle or neck PUP, there's no change in the sound whatsoever.