so the field terminal with out the plastic washer is grounded to work with the pre 1970 regulator, make sence?
with the car running when i would go to plug the blue wire in it would spark you would hear the idle drop slightly and it would be charging ar 15 volts up to 18 off idle. i decided to try plugging the blue wire onto the other field terminal and it instantly shut the car off..
What you did was unknowingly ground the blue wire. The blue wire is the positive field wire which also connects to the ignition system, various solenoids and such.
The only fuse in the blue wire circuit is the fusible link. Check the fusible link for damage.
that was my over sight, however the other field terminal with the plastic washer still has continuity to the alt case its self,
The field (Rotor winding's) inside the alternator is just a large continuous coil of wire. If either end is grounded then both ends will be grounded.
