Hey Mark, When you say that you are now blowing fuses, you mean the fuses in the circuit that you’ve tied the alternator excitation circuit to ? Most people will recommend that you reconfigure everything back to the original circuit and troubleshoot from there.
The excitation circuit is only made up of a ballast light bulb (warning light bulb in the dash mounted voltmeter) in parallel with a small resistor on the back side of the instrument cluster. Check to make sure that both of these components are in good condition and the D+ wire is complete from the alternator to the warning light.
Usually the best universal fix is to replace the initial defective part
One other comment - if the ballast light bulb is burned out, the alternator will have trouble priming at lower RPM's (if it primes at all) to provide a charge to the battery.
Michael
