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VDIAGTOOL V500PRO Auto Circuit Tester , 9-36V Electrical Short/Open Breaker Finder , Auto Electrical Tester with LED Light Overload Protection , 20FT Cable

2025 VDIAGTOOL V500PRO All-in-one car power probe tools covers all circuit tests , including：

✔Circuit Breaker/Open Test
✔AC/DC Voltage Tester
✔Resistance Test
✔Positive / Negative Test
✔Resistance
✔Fuel Injector/Fuse Relay Test
✔Component Activation
✔Tracing Wire
✔Polarity Test
✔Continuity Test
✔Grounding Test
✔Trailer Light Test
✔Oscilloscope Mode
✔Test light
✔Digital circuit tester.

This professional automotive circuit tester is specifically designed for rapid and accurate diagnosis of electrical systems in cars, lorries and other vehicles. it features a TFT colour display with clear icons and large font for easy viewing. Built-in enhanced reverse polarity protection, overvoltage protection and test clamp contact failure protection ensure safer operation. Supporting multiple languages with straightforward operation and compatibility across 9-36V vehicles, it is an essential tool for professional mechanics and DIY enthusiasts alike.

Top Reasons To Choose VDIAGTOOL V500PRO Automotive Power Probe Tools

1.Multimeter Mode(Voltage, Resistance, Diode& Short, Current, Frequency)

VDIAGTOOL V500PRO automotive circuit power probe supports multimeter mode, which are mainly used to measure voltage, current and resistance etc in auto smart power circuit probe tester. These measurement data can be used to evaluate the performance of the automotive electrical system, identify the source of faults, ensure the normal operation of batteries, generators, sensors and other electrical components, and thus improve the overall reliability and safety of the vehicle.

2.Smart Test

The role of VDIAGTOOL V500PRO 9V-30V circuit tester with 20FT Cable is mainly to improve testing efficiency and accuracy.In circuit detection, V500PRO power probe with smart testing can automatically identify circuit status and fault types, and provide real-time data analysis to reduce manual operation errors.

3.Oscilloscope Mode

VDIAGTOOL V500PRO Auto Circuit Tester Power Probe with oscilloscope model.Oscilloscope is used in circuit detectors to monitor and analyze the waveform of electrical signals in real time. It can help customers observe signal changes, judge the frequency, amplitude and shape of the signal, thereby quickly identifying problems in the circuit. Such convenience enables customers to diagnose faults more accurately, optimize circuit design, and improve work efficiency.

4.Relay Test

VDIAGTOOL V500PRO car power probe with relay testing can ensure that the relay works normally under different voltage and load conditions to avoid potential failures. This 9V-30V circuit tester provides customers with the convenience of improving equipment safety and stability, reducing system downtime and maintenance costs caused by relay failures.

5.0-5V Power Supply

VDIAGTOOL V500PRO car smart electrical system diagnostic tools support 0-5V power supply. Its greatest use is to provide stable low-voltage power supply for circuits and is suitable for driving various electronic components and modules. Specifically, it often powers low-power devices such as sensors, microcontrollers, LED lights, Bluetooth and Wi-Fi modules.

6.Component Activation & Signal Circuit Test

VDIAGTOOL V500PRO Car Electric Circuit Tester Resistant Tester Provides power to various car parts like bulbs, radiator fans, starter motors, relays, window regulators, and windshield wipers, enabling effective testing and troubleshooting. Locate auto short circuits if you keep getting blown fuses and also test various sensors, and signal circuits to pinpoint the root cause of electrical issues when you have extracted DTCs from vehicle ECUs

9.Wide Compatibility

VDIAGTOOL V500PRO car circuit tester has wide compatibility and supports power circuit diagnosis of cars, trucks, motorcycles and even ships; at the same time, it supports the measurement of 9V - 30V DC operating voltage, 0.1V -100V voltage, 0KR - 200KR resistors.

11.Support 9 Languages

VDIAGTOOL V500PRO 2 IN 1 Automotive Power Circuit Probe Breaker Finder supports 9 languages, such as English, Chinese, French, Spanish, German, Russian, Italian, Portuguese, Polish, etc., to avoid operational difficulties or misunderstandings due to language barriers and reduce The time it takes for customers to find information or translate documents allows users to understand the functions of the equipment faster and focus on circuit diagnosis tasks.

12.Online Update & 2 Year Warranty & 24/7 Tech Support

VDIAGTOOL V500PRO power circuit probe analyzer supports online update, 2-year quality guarantee and 24-hour professional technical guarantee to protect your after-sales service.

VDIAGTOOL V500 PRO Practical Design Function

1) Smart Test

Different from traditional power circuit testers, the 2025 VDIAGTOOL V500PRO 2 IN 1 Automotive Power Circuit Probe Breaker Finder can automatically identify the signals under test, such as voltage, current, resistance and other parameters in the circuit, and save switching time between different test modes , allowing customers to focus on repairing circuit faults.

2) Multimeter mode

Multimeter: The multimeter in the VDIAGTOOL V500PRO intelligent circuit probe detector is mainly used to measure basic parameters such as voltage, current, resistance, etc. in the circuit, and has a wide measurement range:

👉Voltage Test：0.1-100V;

👉Resistance Test: 0KR-200KR;

👉Current Test：2mA-25A;

👉Frequency Test: 10Hz-1MHZ;

👉Oscilloscope:10Hz-100KHZ.

VDIAGTOOL V500 PRO MODE 1 ---- Relay Test

Relay testing is the process of checking the function and performance of a relay to ensure that it works properly in the circuit. By testing the relay's coil voltage, resistance, contact status, etc., it is possible to diagnose whether the relay is damaged or failed, which is crucial to maintaining the reliability and safety of the electrical system.Common relay tests include:

👉 Voltage test;

👉 Coil resistance test;

👉Relay action test;

👉Relay delay and retention test.

VDIAGTOOL V500 PRO MODE 1 ---- Oscilloscope Function

1.Parameter range

👉Frequency Measurement Range: 10Hz-1000Khz

👉Waveform display: 10Hz-100Khz

2.Oscilloscope Function

✔️Visual fault diagnosis:
The oscilloscope mode visualizes the signal and intuitively displays the change of the signal shape, which makes it convenient for customers to quickly identify abnormal behavior in the circuit, such as waveform distortion, signal attenuation and other problems;

✔️Detect transient problems:
Transient problems in the circuit (such as instantaneous voltage spikes, pulse interference, etc.) are sometimes not captured by static measurement tools (such as multimeters). The oscilloscope can display these transient signals in real time, which helps to find transient faults, such as power supply fluctuations or unstable signals;

✔️ Frequency analysis:
The oscilloscope can not only display the waveform of voltage or current, but also help users measure the frequency, period and other characteristics of the signal. This is very useful for debugging and optimizing oscillation circuits, clock circuits or wireless communication circuits, helping customers accurately diagnose the frequency characteristics of the circuit;

✔️Capture repetitive faults:
For periodic faults, the oscilloscope can find the problem by capturing and analyzing the periodic changes of the signal. For example, users can see if there is repeated noise interference or signal interruption, which helps to accurately locate the cause of the fault.

VDIAGTOOL V500 PRO MODE 1 ---- 0-5V POWER SUPPLY

➤0-5V Power Supply provides a stable and adjustable low-voltage power supply for customers' circuit diagnosis. It can simulate input voltage, debug sensors, test circuit behavior, and calibrate systems. 0-5V Power Supply is commonly used to detect the following low-power electronic devices and sensor systems:

✔️Sensors: oxygen sensors, temperature sensors, pressure sensors, etc.;

✔️Motor drive modules: electric windows, electric seats, etc.;

✔️On-board communication modules: CAN bus interface and other low-power communication modules;

✔️Relays and switches: lights, fans and audio systems;

✔️LED indicators: engine fault lights, oil pressure warning lights, etc.

➤In circuit diagnosis, 0-5V Power Supply can bring the following conveniences to customers

✔️Stable power output: Provides stable and adjustable 0-5V voltage to ensure that low-voltage circuits and equipment can work normally within the design range, avoiding component damage or functional abnormalities caused by voltage fluctuations;

✔️ Convenient debugging and testing: As an analog signal source, users can easily adjust the output voltage for various circuit tests and debugging, quickly verify the impact of different voltage inputs on the circuit, and improve the efficiency of troubleshooting;

✔️High safety: Compared with high-voltage power supplies, 0-5V power supplies are suitable for sensitive electronic components, reducing the risk during the test process, avoiding accidental application of excessive voltage and damage to the equipment, and improving the safety of use.

VDIAGTOOL V500 PRO MODE 1 ---- Component Activation & Injector Test

1) Component Activation

Component activation is mainly used in circuit testers to confirm and test the function and status of each component in the circuit. By activating different components, users can quickly identify faults and ensure the normal operation of the circuit. This provides customers with practical conveniences such as saving time, improving maintenance efficiency, and reducing unnecessary replacement costs.

2) Injector Test

👉Mode 1: One 250 millisecond positive electrode;

👉 Mode 2: Cycle positive for 7 milliseconds, negative for 20 milliseconds in 1.4 seconds;

👉 Mode 3: Cycle the positive electrode for 4 milliseconds and the negative electrode for 10 milliseconds in 1.4 seconds;

👉Mode 4: Continuous output of positive pole for 7 milliseconds and negative pole for 20 milliseconds.

3) Through injector testing, customers can bring the following conveniences

✔️Fault diagnosis: quickly identify injector problems, such as injector blockage, uneven injection amount, injector leakage, etc., to reduce troubleshooting time;

✔️Performance optimization: ensure the normal operation of the injector, improve engine efficiency and power output;

✔️Cost savings: avoid unnecessary injector replacement and reduce repair and maintenance costs.

VDIAGTOOL V500 PRO Circuit Diagnostic Functions

When VDIAGTOOL V500PRO 2 IN 1 Car Power Circuit Probe Open Short Finder switches to mode 2, it is equivalent to V210, with 2 test methods:

V500 PRO Wide Compatibility

Packing List

✔️V500 Pro Circuit Probe Tester x 1

✔️V500 Pro Short Open Circuit Finder x 1

✔️Probe Tip × 1

✔️Fine Probe Tip × 1

✔️Probe Tip Extension Cable x 1

✔️Wire Piercing Probe x 2

✔️Banana to Banana Plug Test Lead × 2

✔️Fuse x 3

✔️Relay Test Cable x 1

✔️Alligator Batterry Clip × 1

✔️Type-C Data Cable x 1

✔️User's Manual × 1

✔️Banana Plug to Alligator Clip x 1