7410Circuit Tracer Detector


Find short and open circuits fast and easily. It is designed to identify and trace wires or cables without damaging the insulation; you just simply attach the sender unit to the circuit and follow the wires by using the detector. There is a sender and a receiver included in the instrument.


  • With CE Approval.
  • Open-circuit locating.
  • Check for short-circuit.
  • Low battery indication.
  • Two 9V batteries required.
  • Suitable for all DC circuits up to 42V.


In order to reach wires in congested or difficult areas, the probe of the receiver is built of coiled steel and may be bent as needed. Depend on the circuit characteristic and sensitivity settings, the probe will pick up the signal from the wire. However, to achieve the best possible detecting range, the receiver's probe tip (black cap) should touch the wire being traced; either above or below it.
  1. Set the switch of Sender to "TONE", the red LED of Sender lights up. If the red LED doesn't light up, please check the battery.
  2. Switch Receiver on, and the red LED of Receiver lights up. If the red LED doesn't light up, please check the battery. Set the rotary switch in high position, and move the sensor close to the test lead of Sender. Receiver shall receive the signal and give audio signal. If so, it means that the unit works correctly.
  3. Connect the black test lead to the circuit's positive supply (or to the negative for vehicles with positive supply connected to chassis).
  4. Set the rotary switch in high position, and move the probe as close as possible to the wire to be traced.
  5. Receiver gives audio signal. Trace the wire by following the audio signal of Receiver. If you move the probe away from the wire, the audio signal will decrease and then disappears.
  6. If it is difficult or impossible to get the Receiver to pick-up any signal, please increase the sensitivity and try again. For the susceptible place, check it twice.
  7. When you finish tracing, disconnect the test leads connections, set the Sender's switch in OFF position.
  1. Disconnect the power to the wire to be checked and remove all the loads from this wire (for example: remove the lamp from the wire).
  2. Set the switch of Sender to "CONT" position. Connect the test leads to a couple of wires which are to be checked.
  3. When the resistance is less than 10k ohm, the green LED of "CONT" will light. With all the loads to be removed, the green LED's lighting indicates that the coupe of wires are in short circuit.
  1. Only for testing DC voltage, don't connect to circuit exceeding 42 volts DC under any circumstance.
  2. Do not use on AC voltage.
  3. Do not apply to any circuit, which directly or indirectly connect to AC lines or any other AC power source.
  4. Do not apply to any components or circuits of the ignition system.
  5. Before using this device, check the vehicle's electrical wiring and disconnect any part of the system, which is sensitive to voltage and current pulses such as air bags, electronic control modules, etc.
  6. After you finish checking vehicle, make sure you have correctly restored all the connections which you had disconnected.
  7. Always follow the instructions and procedures indicated in the vehicle's service manual before attempting to disconnect any part or subsystem of the electrical circuit.