VDIAGTOOL V500PRO is a professional-grade automotive circuit power probe designed for the electrical systems of 9-36V vehicles, including cars, trucks, and other vehicles. As a comprehensive car power circuit tester, the V500PRO supports dual-mode operation and integrates multiple functions, including oscilloscope, multimeter, injector, relay, component activation, and continuity testing. It also supports line tracking, locating open circuits, and checking for open faults.

V500PRO automotive circuit test features a clear TFT color display with intuitive icons and large fonts for easy readability. Built-in protections such as reverse polarity, overvoltage, and test clamp contact failure safeguard ensure safe operation. Supporting multiple languages and compatible with 9-36V vehicles, it is the ideal tool for professional technicians, repair shops, and DIY enthusiasts.

🏆V500PRO Smart Automotive Circuit Tester

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

VDIAGTOOL V500PRO Automotive Circuit Power Probe offers a multimeter mode with key functions like voltage, current, and resistance measurement. It is ideal for diagnosing and testing automotive electrical systems, helping to assess the performance of components such as batteries, generators, and sensors.

2. Oscilloscope Mode

VDIAGTOOL V500PRO Auto Circuit Tester features a built-in oscilloscope mode for real-time waveform monitoring and signal analysis. It allows users to clearly observe changes in electrical signals, including frequency, amplitude, and waveform shape, making it easier to quickly identify circuit faults.

3.0-5V Power Supply

VDIAGTOOL V500PRO car smart electrical system diagnostic tools supports a 0–5V power supply output, providing stable low-voltage power for circuit testing and component activation. It is ideal for powering and checking a wide range of low-power automotive electronic components, such as sensors, ECUs, microcontrollers, LED lights, Bluetooth modules, and Wi-Fi modules.

4.Relay Test

VDIAGTOOL V500PRO car power probe features a relay testing function that quickly checks whether relays are operating properly under different voltage and load conditions. It helps users accurately verify relay response, switching performance, and overall working status, allowing potential faults to be identified before they cause system issues.

6.Component Activation & Signal Circuit Test

V500 Pro activates Car Electric Circuit Tester components ranging from headlights to windscreen wipers, cooling fans to starter motors to ensure they are working properly, and quickly locates short-circuit problems, tests sensors and signal circuits to help you get to the root of electrical problems.

7.Positive & Negative Test

V500PRO automotive circuit tester supports a Positive & Negative Test function, helping you quickly identify the circuit’s positive and negative terminals, determine voltage polarity, and distinguish between power supply and ground. This helps prevent reverse connection, short circuits, and component damage caused by incorrect operation.

🏆V500pro Automotive Breaker Finder

🏆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.

🏆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.

🏆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 V500PRO Automotive circuit tester --- Circuit Diagnostic Functions

➤Checking Short Circuit: Identifies unintended connections causing excessive current flow, helping prevent damage to wiring and components.

➤Locating Open Circuit: Detects breaks or disconnections in circuits to restore proper electrical continuity.

➤Wire Tracing: Follows and maps wire paths, simplifying the identification of correct connections in complex harnesses.

VDIAGTOOL V500PRO Automotive circuit tester ----Practical Design Function

In Multimeter Mode, it provides accurate measurement of essential circuit parameters with a wide testing range:

1. Voltage Test: 0.1-100V;

2. Resistance Test: 0KR-200KR;

3. Current Test: 2mA-25A;

4. Frequency Test: 10Hz-1MHZ;

5. Oscilloscope: 10Hz-100KHZ.

VDIAGTOOL V500PRO Automotive circuit tester ---- Relay Test

VDIAGTOOL V500 PRO Car Power circuit probe supports professional relay testing, helping quickly check the working condition and performance of automotive relays to ensure reliable circuit operation. By testing key parameters such as relay voltage, coil resistance, and contact response, it helps accurately identify damaged or faulty relays, improving the safety and stability of the vehicle’s electrical system.

Supported Relay Tests:

👉 Voltage test;
👉 Coil resistance test;
👉Relay action test;
👉Relay delay and retention test.

VDIAGTOOL V500PRO Automotive circuit tester ---- Oscilloscope Function

VDIAGTOOL V500 PRO Automotive wiring tester is equipped with a built-in oscilloscope mode, enabling real-time waveform analysis for more advanced circuit diagnostics. With visual waveform display, users can clearly observe signal changes and quickly identify issues such as waveform distortion, signal attenuation, voltage spikes, and pulse interference.

1.Parameter range

Frequency Measurement Range: 10Hz-1000Khz

Waveform display: 10Hz-100Khz

2.Oscilloscope Function

✔️Clear waveform display: Instantly see signal changes, making it easy to identify abnormalities like waveform distortion or signal loss.

✔️Capture transient issues: Detect short voltage spikes, pulse interference, and other temporary problems that multimeters can’t catch.

✔️Frequency analysis: Measure signal frequency, period, and characteristics to debug oscillation circuits, clock circuits, or wireless systems.

✔️Detect repetitive faults: Analyze periodic signal changes to locate recurring noise, interruptions, or other issues accurately.

VDIAGTOOL V500PRO Automotive circuit tester ---- 0-5V POWER SUPPLY

The 0-5V power supply provides a stable and adjustable low-voltage source for circuit diagnostics. It can simulate input voltages, debug sensors, test circuit behavior, and calibrate systems. Common applications include 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 output: Adjustable 0-5V ensures circuits operate normally without voltage fluctuations, preventing component damage or malfunction

✔️Easy testing & debugging: Quickly simulate different voltage inputs to test circuit response and improve troubleshooting efficiency

✔️High safety: Low-voltage design protects sensitive electronic components and reduces testing risks.

VDIAGTOOL V500PRO Automotive circuit tester ---- Component Activation

VDIAGTOOL V500 PRO Short circuit finder supports component activation testing, allowing you to directly trigger and verify the working status of electrical components in the circuit.

By activating components in real time, users can quickly identify faults, confirm normal circuit operation, save troubleshooting time, improve repair efficiency, and avoid unnecessary replacement costs.

VDIAGTOOL V500PRO Automotive circuit tester ---- Injector Test

Injector testing is often used to detect the performance and working status of automotive injectors. Through testing, the injection frequency, injection volume, and injection pattern of the injector can be evaluated to ensure that it can accurately supply fuel when the engine is running.

There are 4 Modes for Injector Testing:

• Basic Test: 250ms continuous positive signal (quick power-on check)

• Cycle Test A: Within 1.4 second cycle, 7ms positive + 20ms negative (simulates idle condition)

• Cycle Test B: Within 1.4 second cycle, 4ms positive + 10ms negative (simulates acceleration condition)

• Continuous Cycle Test: 7ms positive + 20ms negative loop (endurance test)

Through injector testing, customers can bring the following conveniences

✔ Fault Diagnosis – Quickly identifies injector issues such as clogging, uneven fuel delivery, and leakage, helping reduce troubleshooting time.

✔ Performance Optimization – Ensures proper injector operation to improve engine efficiency and enhance power output.

✔ Cost Savings – Helps avoid unnecessary injector replacement, reducing repair and maintenance costs.

V500 PRO Wide Compatibility

Packing List

• V500Pro circuit probe tester *1pcs
• V500Pro short open circuit finder *1pcs
• Probe tip *1pcs
• Fine probe tip *1pcs
• Probe tip extension cable *1pcs
• Wire piercing probe *2pcs
• Banana to banana plug test lead *2pcs
• Fuse *3pcs
• Relay test cable *1pcs
• Alligator batterry clip *1pcs
• Type-C data cable *1pcs
• User's manual *1pcs
• Banana plug to alligator clip *1pcs