We designed the ECT3000 as a quick solution to your automotive circuit problems. The ECT3000 consists of 2 main components. An Intelligent transmitter and a Intelligent receiver along with a set of connection adapters that will help you:Locale short circuits without unnecessarily removing plastic panels, molding, and carpet.Trace wires to see where they leadFind open circuits, switches or breaks in wiresTrace and locate the cause of a severe battery drainTest and find intermittent conditionsCheck continuity with the assistance of the Power Probe III, IV, or HookThese features are extremely handy for the professional technician. An appropriate schematic or wiring diagram is always useful and many times necessary when tracing circuits. The better you understand your circuit, the better the ECT3000 can assist you.Locate short circuits without removing plastic panels, molding, and carpet Find short to ground circuits, switches, or breaks in wires Test and find intermittent conditions Sensitivity adjustment from 1-8 in (3-20 cm) Trace short to ground wires with visual navigation & sound indicators Works on Cars, Boats, RV's, Light Duty, Heavy Duty Trucks, and Trailers