Power circuit probe car electrical tester for faster faults
A workshop-grade 24V circuit tester, automotive short finder and vehicle voltage tester in one kit
Happy Customers
Avg Rating (378+ reviews)
Satisfaction Rate
Loved Across Britain
ProbePower
£126.24 inc. VAT (£105.20 ex. VAT)
The KM10 is a workshop-grade automotive power probe kit for tracing shorts, testing 12V and 24V circuits, checking polarity and activating components from one compact setup. Built for UK garages, mobile technicians and serious DIY fault-finding.
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
All-in-One Fault-Finding Kit
Combines power circuit probe, vehicle voltage tester, short tracing and component activation in one tool
How to Use
- Connect the battery clips to the vehicle battery, observing correct polarity.
- Power on the KM10 and confirm the system voltage on the digital display.
- Use the probe tip to test circuits, connectors, fuses or terminals for voltage and polarity.
- Switch to continuity, resistance or diode mode as required to confirm wiring condition.
- Apply power or ground carefully to activate relays, motors, fans or other components for diagnostic confirmation.
- Use the short-tracing function to narrow down wiring faults before repair.
- Disconnect the unit after use and store it in the case to protect the probe and leads.
Trusted by UK mechanics, garages and serious DIYers
What Our Customers Say
Used the KM10 on a Transit with an intermittent rear light fault and the short-tracing function saved a lot of time. The 20FT plus 20FT lead reach meant I could work from the battery right to the back of the van without dragging everything around.
I run a mobile auto electrical service and this has replaced a basic test light and one of my older meters for many jobs. Being able to check polarity, voltage and then activate a relay from the same tool is a real time-saver.
The digital display is clear and the 12V and 24V compatibility is exactly why I bought it. I work on cars and light commercials, so having one car diagnostic circuit tester that covers both is genuinely useful.
Very capable bit of kit and much more useful than a simple circuit tester. The only reason it is not a full five from me is that new users should spend ten minutes learning the functions properly before using the power activation side.
I was looking at Power Probe alternatives and this KM10 kit offered the all-in-one setup I wanted at a strong overall value. Used it already for fan motor checks, continuity testing and chasing a fuse-blowing short on a Fiesta.
Solid workshop tool with good cable length and a tidy case. My only minor gripe is that I would have liked a slightly longer printed quick-start guide, but once in use it is very straightforward.
At ProbePower, we focus on one thing: helping UK technicians diagnose vehicle electrical faults faster and with more confidence. From independent garages and mobile auto electricians to experienced home mechanics, our tools are chosen to make real workshop jobs simpler, cleaner and more efficient.
Our flagship KM10 automotive power circuit probe kit is built around the way modern fault-finding actually happens. Rather than switching between a basic circuit pen, a multimeter and a separate short finder, ProbePower brings key testing functions together in one workshop-ready kit for 12V and 24V vehicles.
We serve the needs of British drivers, garages and trade users working on cars, vans and light commercial vehicles across the UK. That means practical product selection, UK-friendly support, fast dispatch from a UK warehouse and clear technical information without the marketing fluff.
ProbePower exists for professionals who value speed, accuracy and dependable kit. Whether you are chasing an intermittent short, checking voltage drop or powering a relay for confirmation, we are here to help you get to the fault faster and back to the next job.
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.
Frequently Asked Questions
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