As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC LIGHT ILLUMINATED ON TAXI IN. GROUNDED - YES. ACCOMPLISHED ELEC LIGHT MESSAGE BITE PROCEDURE SHOW 1 FAULT AUX BATT CHARGER INOP. ACCOMPLISHED ELEC LIGHT RESET FAULT CLEARED. REACCOMPLISHED BITE CK NO FAULTS NOTED GROUND VERIFICATION CK'S GOOD. ALSO VERIFIED BOTH GREEN LIGHTS ON THE AUX BATTERY CHARGER REF B737-9 AMM 24-31-00-740-801.