Key Features

• -Multifunction Electrical Tester：ATDIAG automotive circuit tracer, equipped with a transmitter and receiver, easily locates short circuits, open circuits, and wiring faults. By observing changes in the LED strip, you can determine whether the fault is a short circuit or an open circuit, without damaging the insulation. Suitable for professional electricians, maintenance technicians, and DIY enthusiasts. ⚠️Important: Designed only for 6–42V DC circuits. Do not use on AC power
• -Efficient Short Circuit Location: Circuit tester of a transmitter and a receiver. Flip the transmitter switch downward. A flashing red indicator signifies a short circuit. Turn on the receiver, which offers three adjustable sensitivity modes (switch to MODE3 when signal reception is poor). When in use, position the receiver perpendicular to the circuit. A beep accompanied by a red LED indicates the short circuit location has been pinpointed. In areas without short circuits, the receiver does not light up.This product delivers clear status alerts through dual audio-visual cues
• -Precise Circuit Breaker Finder: Flip the transmitter switch downward to energize. A flashing green indicator signifies an open circuit/break. Turn on the receiver and position it perpendicular to the wire under test. When the beep and green LED strip stop or show a distinct change, the open circuit location is indicated. In areas without breaks, the receiver's signal light will remain steady with a rapid beep. 🔌 Tip: After testing, disconnect the circuit first, then turn off the transmitter
• -Dual Audio-Visual Alerts: This product employs both audible and visual signals to deliver immediate, clear feedback. Audio tones and bright LED indicators adjust with signal strength, helping you quickly pinpoint faults. A low-battery warning flashes red when power is insufficient. Includes two 9V batteries for both receiver and transmitter. This is an efficient, precise circuit breaker finder tool
• -Continuity Function: ATDIAG electrical tester feature is only available on the transmitter. Switch the transmitter to CONT mode and connect the red and black clips to both ends of the wire. A lit green light indicates a good circuit condition; if it does not light up, it indicates a circuit fault. ✅ Remember: Slide the switch back to OFF after use