As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY CEILING LIGHTS DO NOT ILLUMINATE FROM AFT EMERGENCY EXITS TO AFT LAV WHEN TURNED ON. ON FURTHER INSPECTION FOUND CONNECTOR PS458 NOT CONNECTED. RECONNECTED CONNECTOR AND AFT EMERGENCY LIGHTS CAME ON. PERFORMED OPS TEST OF THE EMERGENCY LIGHTS IAW CRJ 900 AMM 33-51-00-710-801.