Electricians troubleshoot and perform specialized maintenance on equipment including insulation, heating, ventilation, air conditioning, communication, lighting, door, propulsion, and automatic train control and air brake systems. Install, service and repair electrical panels, wiring, lighting, and fixtures as well as specialized electrical equipment and machinery. Replace defective air filters, solid-state control boards, Freon, relays and pressure switches in HVAC system. Locate defective m...