THE HOIST WAS SHUT DOWN AND LOCKED OUT BY 2ND SHIFT ELECTRICIAN TO PERFORM PREVENTATIVE MAINTENANCE ON THE MOTOR BRUSHES. WHEN MAINTENANCE WAS COMPLETE THE HOISTMAN TRIED TO ENERGIZE THE HOIST . THE HOIST WAS UNABLE TO TURN ON. THE ELECTRICIAN LOCKED IT OUT AGAIN AND FOUND A LOOSE CONNECTION IN AN INTERNAL COMPONENENT. IT WAS RECONNECTED AND WAS ENERGIZED.