As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START UP, "ELEC" LIGHT REMAINS ILLUMINATED. GROUNDED - YES. REF B737-900 FIM 34-31 TASK 801, PERFORMED ELECT LIGHT BITE. FOUND BATT CHGR 2 AUX BATT CHG ISPCU I FAULTS. ALL FAULTS ARE INTERMITTENT FAULTS. ALL FAULTS CLEARED. ELEC LIGHT NOW PASSES. NO FAULTS.