As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACFT PREP, ENCOUNTERED STRONG ELECTRICAL ODOR IN LAV AREA WITH APU ON. NO SMOKE OBSERVED. LAV ACCENT LIGHTS HAD BEEN ON PREVIOUS BUT WERE OFF WHEN ODOR DISCOVERED. ACCENT LIGHTS TOOK SEVERAL SWITCH MOVEMENTS TO TURN ON. ELECTRICAL ODOR WAS MOST PRONOUNCED IN SINK/VANITY AREA. APU SHUT DOWN AND ALL ELECTRICAL POWER REMOVED. R & R THE AFT CABIN MANAGEMENT MODULE IAW MM 25-40-01. OPS CHECKED GOOD.