--- product_id: 541111120 title: "Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100" brand: "topdiag" price: "¥23293" currency: JPY in_stock: true reviews_count: 11 category: "Top Diag" url: https://www.desertcart.jp/products/541111120-power-circuit-probe-tool-12v-24v-automotive-circuit-tester-p100 store_origin: JP region: Japan --- # 40FT extended cable reach Clear TFT color display 12V/24V dual system compatibility Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 **Brand:** topdiag **Price:** ¥23293 **Availability:** ✅ In Stock ## Summary > ⚡ Diagnose Like a Pro, Reach Like a Boss! ## Quick Answers - **What is this?** Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 by topdiag - **How much does it cost?** ¥23293 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/541111120-power-circuit-probe-tool-12v-24v-automotive-circuit-tester-p100) ## Best For - topdiag enthusiasts ## Why This Product - Trusted topdiag brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crystal Clear Readings Anytime:** Vibrant TFT display & LED indicators ensure no guesswork in dim garages or bright daylight. - • **All-in-One Automotive Diagnosis:** Combine DC/AC voltage, resistance, continuity & tone testing in one sleek probe. - • **Built-In Safety with Circuit Breaker:** 1-10A overload protection keeps you and your vehicle safe during live component tests. - • **24/7 Support & Warranty Peace of Mind:** Backed by a 1-year warranty and round-the-clock tech support for zero downtime. - • **Extended Reach for Hard-to-Access Areas:** 40FT total cable length lets you conquer trucks, trailers & tight engine bays effortlessly. ## Overview The Topdiag P100 Power Circuit Probe Tool is a professional-grade automotive tester designed for 12V and 24V vehicles. Featuring four versatile testing modes—DC/AC voltage, resistance, and tone—it delivers precise diagnostics with a vibrant TFT display and LED indicators. Its 40FT cable system provides unmatched reach for trucks and trailers, while built-in circuit breaker protection ensures safe operation. Ideal for mechanics and DIY pros, it comes with a 1-year warranty and 24/7 tech support, making it the ultimate tool for efficient vehicle electrical troubleshooting. ## Description Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 | 40FT Cable, Electrical Short Open Breaker Finder for Car, AC/DC Voltage Current Resistance Detection, Trailer Light Tester: desertcart.com: Tools & Home Improvement Review: Perfect replacement for worn-out power probe - Perfect replacement for worn-out power probe Review: I love this - I will like to buy again ## Features - 【 Professional Automotive Circuit Tester for 12V/24V Diagnosis 】 Topdiag P100 is designed for 12V cars, motorcycles, and 24V commercial vehicles. This automotive circuit tester combines DC voltage, polarity, continuity, resistance, AC signal testing, component activation, and power/ground testing in one handheld power circuit probe tester for efficient vehicle electrical diagnosis. - 【 Four Testing Modes for Efficient Diagnosis 】 Topdiag P100 provides four modes: DC voltage, AC voltage, resistance, and tone. DC mode measures voltage, AC mode supports frequency-related checks, resistance mode verifies circuit continuity, and tone mode provides audible feedback for faster diagnosis in hard-to-see areas. - 【 Clear TFT Display & Essential Circuit Checks 】 This car electrical tester supports DC voltage, polarity, resistance, continuity, diode testing, AC signal testing, trailer light testing, and ground/short circuit checks. The TFT color LCD and LED indicators provide clear readings and polarity feedback in garages, engine compartments, and hard-to-reach areas. - 【 AC Signal Testing for Vehicle Circuits 】 With a 0Hz-10kHz tone frequency response, Topdiag P100 helps inspect AC signal circuits, including MAP sensor signals and other electronic circuits during vehicle diagnosis. - 【 Open Circuit Tester with Built-In Protection 】 The auto circuit tester probe helps locate wiring faults, short circuits, open circuits, and poor grounding issues. Built-in 1-10A circuit breaker protection helps reduce overload risk during component activation and circuit testing. - 【 20FT Main Cable + 20FT Extension Cable 】 The automotive circuit tester comes with a 20FT main cable and an additional 20FT extension cable, providing up to 40FT of extended reach. Ideal for testing trucks, commercial vehicles, trailers, tail lights, trailer plugs, and other hard-to-reach wiring areas. - 【 Daily Repair & Wide Vehicle Application 】 Powered directly by the vehicle battery, Topdiag P100 is suitable for garage repair, workshop diagnosis, roadside checks, 12V cars, motorcycles, 24V commercial trucks, trailers, and low-voltage vehicle electrical circuits. Do not use it on high-voltage battery circuits. - 【 1-Year Warranty +24 Hours Service 】 We provide a solid 1-year warranty service and a 60-day no-reason-asked return and exchange guarantee.Our tech support is available 24/7 to quickly resolve quality issues, usually within 24 hours.With worry-free protection throughout the process, you can enjoy a peace-of-mind experience to the fullest. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BZD7PGZR | | Best Sellers Rank | #74,536 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #122 in Circuit Testers | | Brand | TopDiag | | Brand Name | TopDiag | | Color | Black | | Compatible Devices | Vehicles with 12V or 24V electrical systems | | Customer Reviews | 4.6 out of 5 stars 466 Reviews | | Item Dimensions | 9.84 x 3.35 x 7.48 inches | | Item Highlight | 40FT Cable, Electrical Short Open Breaker Finder for Car, AC/DC Voltage Current Resistance Detection, Trailer Light Tester | | Item dimensions L x W x H | 9.84 x 3.35 x 7.48 inches | | Manufacturer | Topdiag | | Measurement Type | Multimeter | | Min. Operating Voltage | 12 volts | | Minimum Operating Voltage | 12 volts | | Model | Topdiag P100 | | Number of Items | 1 | | Part Number | Topdiag P100 | | Power Source | Corded Electric | | Style | P100 | | Style Name | P100 | | UPC | 753955453710 | | Unit Count | 1 Count | | Upper Temperature Rating | 50 °C | ## Product Details - **Brand:** TopDiag - **Color:** Black - **Item dimensions L x W x H:** 9.84 x 3.35 x 7.48 inches - **Power Source:** Corded Electric - **Style:** P100 ## Images ![Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 - Image 1](https://m.media-amazon.com/images/I/81uMuoz1wKL.jpg) ![Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 - Image 2](https://m.media-amazon.com/images/I/81WrzsKx4GL.jpg) ![Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 - Image 3](https://m.media-amazon.com/images/I/81zmFf4GPBL.jpg) ![Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 - Image 4](https://m.media-amazon.com/images/I/81E+BWb4ksL.jpg) ![Power Circuit Probe Tool, 12V 24V Automotive Circuit Tester, P100 - Image 5](https://m.media-amazon.com/images/I/81qS7wV5nEL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: What is the voltage range for the TopDiag P100 Power Circuit Probe Kit?** A: This kit is primarily designed for 12V/24V power supplies and is also compatible with vehicle electrical systems operating between 6V and 30V. It covers testing requirements for various vehicle types, including 12V passenger cars and 24V trucks. **Q: What core testing functions does the TopDiag P100 offer?** A: It features a comprehensive suite of core testing functions, including AC/DC voltage testing, resistance testing, continuity testing, polarity detection, short circuit detection, ground connection testing, and trailer light testing. **Q: Does this kit support multiple languages? Which languages are included?** A: Yes, it supports multiple languages, including English, Spanish, Italian, Portuguese, German, French, Russian, Chinese, and more, making it easy for users with different language backgrounds to operate. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect replacement for worn-out power probe *by R***H on July 21, 2026* Perfect replacement for worn-out power probe ### ⭐⭐⭐⭐⭐ I love this *by N***U on April 17, 2026* I will like to buy again ### ⭐⭐⭐⭐⭐ What a deal! *by J***T on May 20, 2024* I received this over the weekend, today’s Monday and I’ve been using it today at work. What a deal!! One of the other guys has one of the more expensive brands, and I’ve used it many times. This topdiag does just as much at a 1/3 of the price. Came with Soft case, 20ft extension cord, cigarette lighter plug. I like that this one changes the whole screen color, Green for negative, Red for positive. I do wish it had a steady beep with diff tones, but the slow beep for negative, and fast beep for positive is doable. All in all I’m very happy with my purchase, and it was next day delivery. For the price it’s a no brainer. If anything changes in the future, I’ll update, but so far im impressed! ## Frequently Bought Together - Power Circuit Probe Kit, P100 Car Circuit Tester, 12V 24V Automotive Electrical Tool, 6-30V Vehicle Short Circuit Finder with 40ft Cable, Trailer Truck Voltage Current Detector - 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) - WINAMOO Automotive Test Light with 3-48V LED Digital Voltage Display, Auto Circuit Tester with Voltmeter & Dual Color Polarity Indicate, Electric Test Pen w/Stainless Probe for Car/Truck/SUV Checker --- ## 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.jp/products/541111120-power-circuit-probe-tool-12v-24v-automotive-circuit-tester-p100](https://www.desertcart.jp/products/541111120-power-circuit-probe-tool-12v-24v-automotive-circuit-tester-p100) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-23*