What was found
CABIN EMERG LIGHT: FOLLOWING POWER ON CHECLIST , STEP 5 EMER LTS - ARM, NONE OF THE EMERGENCY LIGHTS COME ON. THEY DO TURN ON WITH SWITCH IN ON POSSITION (YES, MAIN BATTERIES ARE OFF DURING TEST). THIS IS POSSIBLE INDICATION A RELAY IS STUCK OR BURNED OUT BACK IN J-BOX. NSTALLED NEW CUSTOMER SUPPLIED FUSE P/N: S2565-5. PERFOMRED OPS CHECK IN REF WITH CE 680 AMM 33-50-00. NO FAULTS FOUND. RETURNED AIRCRAFT TO INITIAL CONDITION.