--- product_id: 215835026 title: "KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform" brand: "kzyee" price: "$366.85" currency: USD in_stock: true category: "Kzyee" url: https://www.desertcart.us/products/215835026-kzyee-km50-power-circuit-probe-and-automotive-circuit-tester-live store_origin: US region: United States of America --- # 7 diagnostic modes Live waveform TFT display Component activation w/o removal KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform **Brand:** kzyee **Price:** $366.85 **Availability:** ✅ In Stock ## Summary > 🔧 Diagnose Like a Pro, Save Time Like a Boss! ## Quick Answers - **What is this?** KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform by kzyee - **How much does it cost?** $366.85 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/215835026-kzyee-km50-power-circuit-probe-and-automotive-circuit-tester-live) ## Best For - kzyee enthusiasts ## Why This Product - Trusted kzyee brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-in-One 7-Mode Diagnostics:** Master AC/DC voltage, resistance, diode, frequency, duty cycle, fuel injection, and component activation in one sleek probe—diagnose faster, smarter. - • **Dynamic Live Waveform Display:** See real-time signal patterns on a vibrant color TFT screen with adjustable sampling—spot intermittent faults others miss, even in dark engine bays. - • **Smart Auto-Reset Breaker & Alerts:** Built-in 10A breaker with LED and buzzer alerts protects sensitive vehicle electronics while giving instant polarity and continuity feedback. - • **Extended 40ft Reach with Rugged Kit:** Work effortlessly on trucks, trailers, and RVs with a 20ft cable plus 20ft extension, all packed in a durable EVA case—ready for any job, anywhere. - • **No-Disassembly Component Activation:** Power up lights, fans, relays, and injectors directly at the probe tip without removing parts—save time and avoid costly guesswork. ## Overview The KZYEE KM50 is a professional-grade automotive circuit tester designed for 12V/24V systems, featuring 7 advanced diagnostic modes including AC/DC voltage, resistance, diode, frequency, duty cycle, and fuel injection testing. Its vibrant color TFT screen displays live waveforms for precise real-time analysis, while the unique component activation function allows testing without disassembly. Equipped with a 10A auto-reset breaker and visual alerts, plus a 40ft total cable reach and rugged carrying case, the KM50 empowers DIYers and technicians to quickly identify and fix electrical issues with confidence and efficiency. ## Description KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform | 12V/24V Short Circuit Finder, Open Circuit Detection, AC/DC Voltage, Resistance, Frequency, Duty Cycle, Component Activation: desertcart.com: Industrial & Scientific ## Features - Find Electrical Problems Faster — Use the KM50 automotive electrical tester and power circuit probe to check voltage, polarity, continuity, short circuits, open circuits and bad grounds on 12V/24V vehicle systems - See Signals as They Change — View digital readings or a live waveform to check AC voltage, frequency, duty cycle and changing sensor signals while troubleshooting - Check Fuel Injector Circuits — Use the dedicated fuel injector circuit tester mode to check injection time, supply voltage, induced voltage, ground voltage and control waveform - Trace Shorts and Bad Grounds — Use the KM50 as an automotive short circuit finder to follow suspected wiring, check continuity and narrow down shorts, open circuits and poor ground connections - Power and Test Components — Use component activation to send positive power or ground from the probe tip and check supported components without separate jumper leads - Test Before Replacing Parts — Seven test modes cover DC Voltage, AC Voltage, Frequency, Duty Cycle, Fuel Injection Circuit, Resistance and Diode to help confirm the circuit before replacing parts - Easy to Read. Protected to Test. — A color TFT display, red/green polarity LEDs, work light and buzzer give clear feedback, while the built-in circuit breaker helps protect the tool during testing ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08CDF1SPJ | | Best Sellers Rank | #38,736 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Current Probes | | Brand | KZYEE | | Brand Name | KZYEE | | Color | Orange | | Compatible Devices | Vehicles with 12V or 24V electrical systems and a cigarette lighter port | | Customer Reviews | 4.6 out of 5 stars 3,865 Reviews | | Direct Current Maximum | 8 A | | Item Highlight | 12V/24V Short Circuit Finder, Open Circuit Detection, AC/DC Voltage, Resistance, Frequency, Duty Cycle, Component Activation | | Item Weight | 0.48 kg | | Manufacturer | KZYEE | | Maximum Operating Voltage | 30 volts | | Measurement Type | Multimeter | | Min. Operating Voltage | 8 volts | | Minimum Operating Voltage | 8 volts | | Model | KZYEE-KM50 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | KZYEE | | Power Source | Vehicle 12v Battery Power Supply Or Ci-garette Lighter Power Supply; 24/7 Assistance Via Support@kzyeetech. Com Power Source Vehicle 12v Battery Power Supply Or Ci-garette Lighter Power Supply; 24/7 Assistance Via Support@kzyeetech. Com See more | | 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 80%! 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 80%! See more | | Style Name | 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 80%! | | Unit Count | 1 Count | | Upper Temperature Rating | 60 °C | ## Product Details - **Brand:** KZYEE - **Power Source:** Vehicle 12v Battery Power Supply Or Ci-garette Lighter Power Supply; 24/7 Assistance Via Support@kzyeetech. Com - **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 80%! - **Color:** Orange - **Min. Operating Voltage:** 12 ## Images ![KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform - Image 1](https://m.media-amazon.com/images/I/8124qLyd3yL.jpg) ![KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform - Image 2](https://m.media-amazon.com/images/I/71a6W4yEkWL.jpg) ![KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform - Image 3](https://m.media-amazon.com/images/I/81qQKhJ7GzL.jpg) ![KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform - Image 4](https://m.media-amazon.com/images/I/61rPxgv-8pL.jpg) ![KZYEE KM50 Power Circuit Probe & Automotive Circuit Tester, Live Waveform - Image 5](https://m.media-amazon.com/images/I/71bs0A68feL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: What can the KM50 test, and does it work with 12V/24V vehicles?** A: KM50 supports 12V/24V vehicle electrical systems with 7 modes: DC/AC Voltage, Frequency, Duty Cycle, Fuel Inject, Resistance and Diode. It also checks continuity, polarity, short circuits, bad grounds and components. **Q: What can the KM50 Fuel Inject mode show?** A: Fuel Inject mode shows injection time, injector supply voltage, ground voltage, reverse induced voltage and the control waveform in real time, helping you evaluate injector circuit behavior before deeper wiring or component checks. **Q: an the KM50 activate motors, lights and other electrical components?** A: Yes. Component Activation can apply positive power or ground through the probe tip to check whether supported electrical components respond, helping you narrow down whether the issue is in the component or the circuit before replacing parts. **Q: Can the KM50 test sensor and signal circuits?** A: Yes. KM50 supports signal circuit testing. Frequency and Duty Cycle modes can show digital data and live waveforms, helping you observe changing signals and identify abnormal circuit behavior beyond basic voltage checks. **Q: Is the KM50 easy to use in dark areas, and does it have overload protection?** A: Yes. LED lighting helps illuminate dark work areas, while the TFT display, red/green LEDs and buzzer provide clear feedback. An internal circuit breaker trips during overload to help protect the tester. ## Frequently Bought Together - 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 - Heavy Duty 3-65V Backlit Digital LCD Circuit Tester, Test Light with 140 Inch Extended Spring Wire, Car Truck Low Voltage & Light Tester with Stainless Probe - JOREST 300Pcs Car Fuse Assortment Kit, 160 Mini Blade Fuses Automotive + 90 Standard Auto Fuses + 50 Micro + Puller – Replacement for RV Camper Boat Truck (2Amp 3A 5A 7.5A 10A 15A 20A 25A 30A 35A 40A) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/215835026-kzyee-km50-power-circuit-probe-and-automotive-circuit-tester-live](https://www.desertcart.us/products/215835026-kzyee-km50-power-circuit-probe-and-automotive-circuit-tester-live) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-03*