About this item

• 【LED Indicator & Buzzer】When the dc circuit tester touches the positive pole, the LED should be red and the 'beep' will become sharp; when it touches the negative pole, the LED should be GREEN and the beeping sound will become smooth, which can help you quickly identify the positive and negative polarity of the vehicle cable and plug.
• 【Grounding Test & 20ft Long Test Lead】The electric probe circuit tester has a ground prompt device, if the LED indicator turns green and the buzzer sounds, it means the ground is good. If not, the LED remains red and does not beep. The Circuit Tester features a long 20-foot (6m) cable that allows you to test from the front to the rear of the vehicle (trucks, trailers, vessels, tractors and other vehicles that use DC circuits), so easy to check the whole electrical circuit system.
• 【Quick Self-Test & Overload Protection】Before you test a circuit or component, the tester can perform a quick self-test to ensure your tool is in good condition. If overloaded, the 10-amp circuit breaker within the circuit probe tester will trip and automatically disconnect the protection circuit. The circuit breaker is a valuable test tool as well as a safety measure to protect the tool from overload and make the product more long-lasting.
• 【Activate & Test Components】To use component activation with a circuit tester, you typically connect the tester to the circuit and then use the tester's controls to activate or control specific components, such as relays, solenoids, or actuators. By allowing you to activate or control specific components in a circuit, you can help diagnose problems more quickly and accurately, and make repairs more efficiently.
• 【Why It’s Useful】Utilizing the GODIAG probe tester allows you to assess continuity, polarity, voltage, as well as ground signals and identify short and open circuits. Additionally, the Power Circuit Probe enables you to examine switches, relays, and the state of diodes, fuses, and circuits while powering electronic components. This tool can help you in identifying faulty wires and pinpointing locations of breaks.