What was found
(CAN) 85 MILES OUT OF MEM, NR 2 ENGINE OVERHEAT WARNING ILLUMINATED, THROTTLED BACK SNAG CLEARED. AIRCRAFT DIVERTED TO MEM. ON APPROACH, OVERHEAT WARNING REAPPEARED, FIRE BOTTLES DISCHARGED AND NR 2 ENGINE SHUTDOWN. DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. FOUND FIRE AND OVERHEAT ELECTRICAL CONNECTORS LOOSE ON UPPER FIRE/OVERHEAT DETECTOR LOOP. ENGINE RUN, NO FURTHER SNAG. REPLACED BOTH FIRE BOTTLES. ON RETURN TO YYZ, AT MOCS REQUEST REPLACED THE FIRE CONTROL PANEL.