Features:1.【Wide Application】Circuit tester is suitable for diagnosis of all 5V to 30V vehicle electrical systems. Test light can check switches, battery performance, headlights, speed sensor, relays, and diodes, fuses, internal signal of the computer and the shorts/breaks of the circuit, helping you reduce diagnostic time for your car's electrical system. Suitable for all kinds of cars, trucks, trailers, vans, RVs, motorcycles, boats, etc.And our test light is CE, FCC and RoHS certified,safe and reliable.2.【3 Working Modes】Test light has 3 working modes for you to choose:Fast test mode (LED digital display&light bulb work at the same time),Computer-safe mode (only LED digital display works),Bulb mode (only light bulb works).3 modes can help you test voltage and diagnose faulty battery or fuse circuit accurately. The brightness of the bulb vary with the voltage measured. You can judge the strength of the voltage through the brightness. The higher the voltage(30V max), the brighter the bulb(5W max).3.【Voltage Measurement with Light Bulb】Voltage tester uses a 5W car bulb as the load. Through the brightness of test light bulb, you can quickly judge the power supply failure of the line.Compared with diode tester, it can find the hidden faults such as poor circuit contact, virtual voltage and excessive resistance.Combined with the brightness of test light bulb and voltmeter function of test light, more accurate voltage measurements can be achieved, thereby improving fault diagnosis capabilities.4.【Reverse Polarity/Continuity/Grounding Test】Test light can quickly and intuitively distinguish the positive and negative poles of the power supply through red and green light-emitting diodes. The red light means the positive pole, and the green light means the negative pole. Electrical tester also can perform short circuit test, continuity/grounding test/jump operation,detect LAN local area network circuit,ABS/airbag/exhaust gas recirculation circuit, distinguish real/virtual/series electricity.5.【Frequency Prediction&Pulse Signals Measurment&Fault Code Reading】Test light can be used to measure fuel injector signals, spark plugs, crankshaft sensor signals. When it is connected to an AC signal(5-30V),frequency range can be estimated through the display. Pulse signals such as H.all sensor, ignition pulse, fuel injector pulse,fuel carbon canister solenoid valve can be measured quickly through diode of test light.The bulb can be removed to bridge car diagnostic socket to read LED flash code.6.【LED Digital Display&Replaceable Bulb】Voltage tester has a bright LED digital voltage display, you can easily read voltage readings during the day or night. There is a 5W replaceable test bulb on the top of test light with high brightness.This bulb is universal to car bulbs and can be replaced directly.You can also use the bulb as a flashlight in dark conditions, just clamp the clip on positive pole and probe tip touches the device under test.The metal inside is grounded, and the bulb will lit.7.【Load Simulation Measurement】Electric tester pen has a compact size, which can detect hard-to-reach narrow areas and pierce wires. For the load plug, you can use the auxiliary probe attached to the clip, combined with the main probe, to directly perform load simulation measurement, which is convenient for fault diagnosis. Circuit tester is made of durable ABS material. It equipped with a 45-inch long superior silicone cable, which is is heat resistant and high tensile strength. Professional car test light：• Check the fuse• Check battery performance• Detection of positive and negative power• Detect L AN local area network circuit• Test Hall sensor performance• Detection of short circuit faults• Detect vehicle speed sensor• Detection of ABS circuit• Detect the idling circuit,ignition circuit,Circuits such as fuel injection circuit• Fault code reading function• Torch lighting function• Distinguish between real electricity, virtual electricity, series electricity Main Features:• Real-time voltage display• Positive and negative direction detection• Frequency prediction• 3 Modes switch• 5W replaceable bulb• Fast circuit detection 3 Modes SwitchThere are 3 modes in total. The mode switch is operated by the physical buttons of the electric pen body. Press and release the button to cycle through the three working modes. • Mode 1LED digital display and bulb work at the same time.• Mode 2LED dgital display works, the bulb does not work.• Mode 3LED digital display does not work,bulb works normally.
