As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN PEFORMING CAUTION/ADVISORY LIGHT TEST, THE ADVISORY LIGHTS TEST SETS OFF THE "FIRE BELL" AND THE "ENGINE FIRE PRESS TO RESET" RED WARNING LIGHTS. FOUND SHORT ON CONNECTOR PLUG, CONNECTOR 2600-J24 BETWEEN PINS C AND B, R & R CONNECTOR. ALL OPS CHECKS GOOD, CAUTION ADVISORY LIGHTS TEST NORMALLY.