So in my SG Standard, I was gong to fit some Iommi pickups, but the deal fell through, so instead I bought some John Birch Fang Cobra ones. They came with a single wire, and so I assumed it would be very simple to wire up. I removed the old pickup wires- earths from the back of the volume pot, and red live off the lug. I then soldered my new braided wire to the back of the volume pot and then to the same lug as the old one. But...no sound. So I undid them both, did again, but still no sound. What am I doing wrong? I did take some pictures but they are too big, so will take again tonight when at home but anyone any ideas now?