The Ultimate Automotive Power Circuit Tester
Trace open circuits, activate components, and diagnose 9V-30V vehicle wiring faults faster than a standard multimeter with our professional all-in-one diagnostic probe.
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Loved Across Britain
CircuitTest UK
£301.71 inc. VAT (£251.42 ex. VAT)
An all-in-one professional power probe tester and automotive wire tracer for 9V-30V vehicle systems.
Free UK Delivery
Next-day dispatch from our Midlands warehouse
2-Year Warranty
Full commercial workshop warranty with UK support
30-Day Returns
Test it in your garage. Not for you? Return it free.
20FT Extension Cable
Easily reach the rear of vans and commercial trailers
Diagnostic Applications
- Connect the battery clips directly to the vehicle's 12V or 24V battery to power on the unit.
- Select your desired mode (Voltage, Resistance, Oscilloscope, or Component Activation) via the TFT display.
- To use as a car short circuit finder, run the probe tip along the suspected wiring loom; the audio tone will change when the short is located.
- To activate a component (e.g., cooling fan or fuel injector), securely contact the component's positive terminal and press the power switch forward to supply battery voltage.
- Always utilize the built-in 10A circuit breaker to protect the vehicle's sensitive ECU systems during testing.
Trusted by Over 4,000 UK Auto Electricians & Garages
Trade 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.
At CircuitTest UK, we know that time is money in the workshop. Modern vehicle electrical systems are becoming increasingly complex, and traditional multimeters simply aren't fast enough for tracing elusive parasitic drains, open circuits, or intermittent relay faults. That's why we developed a professional-grade alternative tailored specifically for the British automotive industry.
Our flagship diagnostic tools combine the functionality of a power probe, wire tracer, multimeter, and oscilloscope into a single, robust unit. Designed to handle everything from 9V passenger cars to 30V commercial HGVs, our equipment allows mechanics and mobile auto electricians to test components, activate injectors, and trace wiring faults without constantly switching between different handheld devices.
Operating from our UK distribution centre, we are committed to providing independent garages and diagnostic technicians with reliable, UKCA-certified equipment. With a 20FT working cable designed for real-world workshop environments, comprehensive technical support, and a comprehensive 2-year warranty, CircuitTest UK is your trusted partner in automotive electrical diagnostics.
Why UK Customers Love Us
Our products are designed and supported in the UK, ensuring superior quality and fast tracked delivery from our British warehouse. We offer free UK delivery on all orders, eco-friendly packaging to reduce carbon footprint, and warm, direct customer service. Every order is backed by a generous 30-day returns policy under the UK Consumer Rights Act 2015 — you are always protected.
Technical FAQs
From The Workshop Blog
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