I am rusty with troubleshooting skills, so I am having a difficult time finding the issue with my Pioneer S-W700 subwoofer. I have tried to determine what is causing the unit to blow fuses as soon as power is applied. So where do I star? All I have is a multimeter to aid in troubleshooting. I think there is a short somewhere causing the fuse to blow. Can someone tell me where to start? I have the schematic, but need a method and starting point for troubleshooting. Please help!