KZYEE KM50 (Upgrade of KM10) Power Circuit Probe Kit - 12V/24V Automotive Circuit Tester Current Probe with AC/DC Voltage/Resistance/Diode/Frequency/Duty Cycle/Fuel Injection, Activate Component
Condition: New
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Thursday, Aug 21
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Size: KM50
Features
- All-in-One Diagnostic PowerNo more juggling multiple testersthis powerful circuit tester tool does it all: DC/AC Voltage test,Fuel InjectorTest,Fuse,Continuity Test,Signal Circuit Test,Component Activation,Polarity Test,Resistance/Diode Test,Short Circuit Test,Open/Breaker Circuits Test,Frequency/Duty Cycle Test,Trailer Light and Connector Test,Ground Detection,Track and Locate Short Circuitsall in seconds. Easy to use. Built to last. Trusted by pros. Take control of your vehicles electrical healthwith one tool that does it all.
- 7-in-1 Smart Circuit TesterProfessional precisionwithout the complexity. This power circuit probe tester tool puts pro-level diagnostics in your hands! With 7 advanced test modesDC/AC voltage, resistance, continuity, duty cycle, frequency, and injector testing. No more bulky toolsjust plug, press, and diagnose in seconds. Works flawlessly on 830V system cars, trucks, trailers, RVs and so on. Perfect for pros, beginners and DIYers alike. Fast, simple, pro-level clarity!
- Fuel Injector & Frequency Testing Made EasySay goodbye to hard starts and rough idling. The KM50 features a dedicated Fuel Injector Test Mode, allowing you to pinpoint fuel system faults fast. With Frequency and Duty Cycle Modes, it captures performance issues that others missperfect for home garages and auto repair shops. Youll save time, save money, and keep things running like new.
- Track Down Shorts in SecondsNo more tracing wires endlessly or replacing fuses blindly. With the KM50, you can locate short circuits in secondsjust plug, energize, and follow the tone. Built-in overload protection means you can test confidently without damaging components. Whether you're stranded on the side of the road or in your workshop with a full queue, this tool gives you the upper hand.
- Real-Time Waveform & Digital DisplayStop guessing. Start knowing. Diagnose smarter. With live waveform visuals and real-time digital readings. Instantly see electrical fluctuations and detect unstable signals or failing injectors. One-button switching makes it easy for beginners and professionals to spot issues in seconds.
- Visual + Audio Feedback, No Wire DamageBright LED polarity indicators, a built-in buzzer for continuity, and a piercing probe allow accurate readings without cutting wires. Whether you're under the hood or working in dim light, this tool helps you troubleshoot clearly, cleanly, and confidently.
- BUILT TO LAST & WARRANTYThis isnt a gadget. Its your go-to tool. This 12V 24V power tester probe is housed in a durable shell, packed in a rugged case, and backed by 12-month warranty, lifetime tech support, and 90-day returns. If anythings missing or wrongwe make it right, fast. Contact us at support@kzyeetech. com with your order number and photos well send replacements at no charge. Buy it once. Trust it for years. Our probe tester is the tool you can bet on.
Brand: KZYEE
Power Source: Battery Powered
Style: KM50 Automotive circuit tester reveals hidden problems others miss! 7 Advanced Test Modes (DC/AC Voltage, Resistance, Diode, Frequency, Duty Cycle, Fuel Injection) – Quickly identify faulty circuits while eliminating good ones, cutting diagnostic time by 50%! See more
Color: Red, Green
Min. Operating Voltage: 12
Brand: KZYEE
Power Source: Battery Powered
Style: KM50 Automotive circuit tester reveals hidden problems others miss! 7 Advanced Test Modes (DC/AC Voltage, Resistance, Diode, Frequency, Duty Cycle, Fuel Injection) – Quickly identify faulty circuits while eliminating good ones, cutting diagnostic time by 50%!
Color: Red, Green
Min. Operating Voltage: 12
Measurement Type: Multimeter
Manufacturer: KZYEE
Item Weight: 2.44 pounds
Package Dimensions: 10.08 x 8.94 x 2.91 inches
Item model number: KZYEE-XXX
Manufacturer Part Number: KM50
Date First Available: July 6, 2020
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Aug 21
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Top Amazon Reviews
Size: KM10
Worth the money and operates as expected. The slight delay in the changing of operations helps with the accidental depression of the test button.
Reviewed in the United States on June 12, 2025 by Amazon Customer
Size: KM50
World great the easy way to test wires voltage amps ground with out switching the reading, one and done
Reviewed in the United States on June 5, 2025 by Laura J. Hogencamp
Size: KM10
Very useful.
Reviewed in the United States on June 15, 2025 by David Hartranft
Size: KM50
i dont like the fact that no attachments were provided to get inside fuse box pins for relay testing etc. - the tip on this is too thick for a lot of the work this is meant for, like backprobing connectors - you can kind of jerry-rig needle multimeter attachments on top of it but its not great
Reviewed in the United States on November 8, 2024 by max
Size: KM10
Excelente
Reviewed in the United States on May 17, 2025 by Yunaisy Charles
Size: KM10
I had used it for about a year, no major issues. My only issue with the design is the length of the grounding cable, just a bit short for what I usually need it for, but I've been able to make it work with an extra wire. The only real problem I came across was when I had made the mistake of trying to apply power or ground to a wire when it had the other already active. User error, really. But it was when I kept doing it when I had to apply one of the two before making contact, like in a tight space. It would normally shut down and restart if you made a mistake, like normal. But I had done it quite a few times in a row and it had shut down completely. Few days later, it starting working again, but sometimes when you power it, it doesn't show or do anything on the screen but a blank background. Again, user error caused it. But other than that, having it as a mobile mechanic has saved me so much time, being able to see what is actually happening. I only have the KM10, but I honestly might upgrade to see what I can use the nicer model for. It was well worth the price.
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Reviewed in the United States on June 30, 2023 by Michael Burr
Size: KM10
works great
Reviewed in the United States on February 18, 2025 by Gary
Size: KM10
Screen lights up but is always blank, either circuits bad or screen it, but it's doa right out of the box, literally the first time I used it, the same day it arrived. Should not have bought a cheap clone. Next day, I was going to use the non digital parts to chase down my issue, and it started working and I liked it. Since that one was flaky, I got another to try, seems to work, bumping 3 to 3 stars, will update next time I use it, but it's pretty infrequent, that I chase the kind of electrical issue that needs more than just a test light so it might be a while. They did refund the price with no complaints, so that's good. Liked customer service If it seems reliable I'll update the review later.
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Reviewed in the United States on May 19, 2024 by Eric W. Brown