Automotive Circuit Probe for Faster Vehicle Fault Finding
Trace shorts, opens, broken wires, relays and trailer faults on 12V and 24V systems
Happy Customers
Avg Rating (324+ reviews)
Satisfaction Rate
Loved Across Britain
Free UK Delivery
Next-day dispatch from our UK warehouse
2-Year UK Warranty
Full manufacturer warranty with UK support
30-Day Free Returns
No questions asked, prepaid return label
6-in-1 Fault Finding
Power circuit probing, short tracing, open circuit finding, relay and fuse checks, plus trailer testing in one tool
PowerCircu
£172.55 inc. VAT (£143.79 ex. VAT)
A professional-grade automotive electrical tester for tracing shorts, open circuits, broken wires, relay faults and fuse issues on 12V and 24V vehicles.
What Our Customers Say
I run a small independent garage and bought this to speed up electrical diagnosis. It has been excellent for tracing short circuits and checking relay feeds without dragging out three different tools.
Used it on a van with an intermittent side light fault and it found the broken wire section far quicker than my old tester. The voltage display is clear and the lead length is genuinely useful.
Bought it mainly for trailer wiring faults on horsebox and utility trailers. It made it much easier to isolate the bad connection and check fuse circuits at the same time.
As an auto electrician, I wanted something with workshop-level capability but better value than Power Probe. This covers power, ground, open circuits and relay testing very well for the money.
Very capable tool and ideal for 12V and 24V checks on our fleet vehicles. My only criticism is that first setup takes a bit of reading if you have only used a basic test lamp before.
I used it as a car fuse tester and cable tracer on a stubborn boot wiring fault. It worked well and feels solid, though I would have liked a carry case included as standard.
How to Use
- Connect the unit directly to the vehicle battery using the supplied lead and clips, observing the correct polarity.
- Select the required test mode and confirm the circuit type you want to diagnose, such as voltage, short tracing, open circuit finding or relay testing.
- Probe the circuit, connector, fuse point or component terminal while monitoring the voltage readout and audible/visual feedback.
- Use the tool to activate or verify power and ground where appropriate, following the user manual and vehicle wiring diagram.
- For trailer wiring or broken wire detection, move along the circuit step by step to isolate the section where power or continuity is lost.
- Disconnect the tool after testing and store it safely in a dry place.
At PowerCircu, we believe electrical fault-finding should be faster, clearer and more practical for the people who actually work on vehicles. Our range is built around professional-style automotive diagnostic tools designed for UK garages, mobile technicians and serious DIY owners who want more capability than a basic test light or entry-level circuit tester can offer.
Our flagship solution focuses on real-world vehicle troubleshooting: tracing short circuits, locating open circuits, identifying broken wires, checking relay and fuse operation, and testing trailer wiring from a single handheld unit. Whether you are working on a car, van, pickup, lorry or trailer, PowerCircu is designed to help you diagnose faults with less guesswork and less wasted time.
We position ourselves as a smarter-value alternative to big-name brands such as Power Probe and TOPDON, with an emphasis on strong functionality, workshop usability and dependable UK customer support. Every product is selected to meet the needs of technicians who want reliable performance on both 12V and 24V vehicle systems.
From our UK-focused service standards to clear safety documentation and compliance-led sourcing, PowerCircu is built for confidence. If you need an automotive electrical fault finder that helps you work faster and troubleshoot more accurately, you are in the right place.
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.
Trusted by UK mechanics and serious DIY owners
Frequently Asked Questions
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