ECT3000 Circuit Tracer - Rec and Trans ONLY The Power Probe ECT3000, a 2-pc circuit tracer, transmits a signal into an isolated circuit (shorted or open) and traces the direction to the problem. . The receiver allows users to see the distance from the wire being traced and the direction to the short. . The auto-signal locking feature eases first-time use and eliminates the need to remove interior trims and carpets. . The integrated flashlight will illuminate the workspace and the automatic 10-minute shut off helps users save battery life. ECT3000B