What was found
DURING CLIMB OUT OF HNL, GEN AMPS AND STBY POWER ON ANNUNCIATORS BOTH ILLUMINATED INTERMITTENTLY. GEN AND ALTERNATOR AMPS BOTH FLUCTUATED BETWEEN APPROXIMATELY 0-15 AMPS. WE REQUESTED TO RETURN TO HNL AND MADE A RECAUTIONARY LANDING. WHEN ASKED BY ATC IF WE REQUIRED ANY ASSISTANCE, I DECLINED. DESPITE MY RESPONSE, THEY DECLARED AN EMERGENCY FOR US AND ROLLED FIRETRUCKS AS A PRECAUTION. WE LANDED HNL AND TAXIED BACK TO PARKING WITHOUT INCIDENT. PA WAS MADE TO PAX BOTH IN FLIGHT AND ON GROUND AFTER LANDING. NO PAX COMMENTS RECEIVED.