I'm going to replace the wiring. I'm hoping that when I bought the gauge cluster originally I got a 12v gauge and that it might have survived my screw up. If that is so then I don't need a voltage reducer and I can hook the hot wire to the F terminal, which is the lower one on the 54, the sender to the E terminal and ground from the gauge housing mounting screw to dash. Just hope I didn't ruin something else that is preventing the engine from turning over.