There is really not a specific fuse that provides power to the coil, just make sure that your fuses are good, which shows that there are no major issues. Just make sure you have 9+ volts at coil positive with the ignition on, AND while cranking. If you are missing the voltage at the coil positive either while cranking or with ignition on, follow the wires from the starter back up and be sure they are in good shape. They are vulnerable to heat damage from the manifolds. If you are missing the tube on the back of the head that guides and protects the starter wires, you are likely to have burned insulation.