My '83 245 project for my daughter is almost complete ... except it won't start. I tested the red wires from the battery and all had juice. I test the little brown wire going to the coil, NO JUICE. Where does that brown wire originate from? Which terminals on the fuse panel should I check for corrosion? Or is that where to start? Where are the likely places to look? The starter is getting power and turns the engine fine, but no spark. All the lights work fine. Help.