VDIAGTOOL V500 Pro Automotive Power Circuit Probe Tester with Breaker Finder, Multimeter Oscilloscope Relay Injector Tes
£301.71 inc. VAT (£251.42 ex. VAT)
- Integrated breaker finder pinpoints short circuits faster, cutting diagnostic time in the workshop.
- Power probe applies instant voltage or earth to test components without extra leads.
- Built-in oscilloscope shows live sensor and actuator waveforms for deeper fault tracing.
- Relay and injector tester verifies switching performance before replacing expensive parts.
Why Choose CircuitTest UK
The Ultimate Power Probe Tester
Stop wasting time switching between a multimeter, a test light, and a wire tracer. The Pro V-Trace Diagnostic Tester is a professional-grade power probe tester engineered to streamline automotive electrical fault finding. Whether you are dealing with a parasitic drain, a blown fuse, or a faulty relay, this all-in-one unit delivers the precise voltage, resistance, and current readings you need to diagnose the issue instantly.
Advanced Automotive Wire Tracer
Finding a broken wire in a modern vehicle loom can take hours. Our integrated automotive wire tracer and car short circuit finder functionality allows you to pinpoint open circuits and shorts quickly. The built-in breaker finder alerts you precisely when you've located the fault, saving you from tearing apart unnecessary interior trim or unwrapping intact wiring harnesses.
Built for UK Workshops (12V & 24V)
Designed for real-world garage environments, this 12v 24v circuit tester is equally at home working on passenger cars, transit vans, and 24V commercial HGVs. It features an integrated automotive oscilloscope tester to view live sensor signals, alongside dedicated modes to act as an automotive relay tester and fuel injector tester. With the included 20FT extension cable, you can easily power components at the rear of a long wheelbase van directly from the vehicle battery.
Technical Specifications
- 9V - 30V DC
- 20 Feet (6.1 Metres)
- 2.4" TFT Colour LCD
- 10Hz - 100KHz
- 0 - 100K Ω
- UKCA, CE, RoHS, WEEE
- 10A Auto-Reset Circuit Breaker
- 0°C to 60°C
Price Comparison
See how our price compares across UK retailers
| Retailer | Price | Delivery | Warranty |
|---|---|---|---|
| CircuitTest UK UK (Specialist)BEST | £301.71 | FREE | 12 months + UK Support |
| eBay (est.) | £377.14 | Varies | Seller dependent |
| High Street RRP | £482.74 | N/A | Varies |
Prices checked 12 June 2026. Prices may vary.
Customer Reviews
An absolute game-changer for my mobile auto electrical business. The automotive wire tracer feature saved me hours trying to find a broken wire in a Transit loom yesterday. Highly recommend.
Brilliant piece of kit. I bought it primarily as a car short circuit finder, but the built-in oscilloscope has been fantastic for checking ABS sensor waveforms. Delivery was next day as promised.
The 20ft cable is what sold me. I can hook it onto the battery of an HGV and still reach the rear tail lifts to test the relays. A proper 12v 24v circuit tester that feels incredibly robust.
Great power probe tester overall. It does everything my old £300 unit did. My only minor gripe is the screen can be slightly hard to read in direct, bright sunlight, but otherwise it's flawless.
Much better value than the big-name competitors. The automotive component activation tester function is brilliant for testing cooling fans and fuel injectors without having to hotwire them.
I run a small independent garage and this vehicle electrical tester has sped up our diagnostics massively. The case is a bit bulky for my top drawer, but the tool itself is top quality.
Fantastic fuse relay tester. I had a nightmare parasitic drain on a BMW, and this automotive circuit probe helped me isolate the faulty module in under 20 minutes. Worth every penny.