Is it the Generator or Regulator that is bad?
Use a jumper wire to ground the FIELD terminal of the regulator to the engine block. This will by-pass the regulator to see if the generator is working. If you increase the engine rpms and the output increases (watch the amp gauge in the dash) the chances are good that the generator is fine and the regulator is at fault. If there is no increase in output remove the ground from the engine block and strike it against the engine block. If you do NOT get any sparks that will confirm the generator is not working.
Fifth Avenue Facts
Randy sent the director of the film "Lolita" two 6-volt alternators and saved him from being late--they finished filming early!