--- product_id: 356505867 title: "Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection" brand: "cmtool" price: "S$31" currency: SGD in_stock: true reviews_count: 11 url: https://www.desertcart.sg/products/356505867-power-circuit-probe-tester-6v-24v-dc-test-light-automotive store_origin: SG region: Singapore --- # 6V-24V DC wide voltage range 4M extended test lead for full vehicle coverage Overload protection with 7A auto-trip Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection **Brand:** cmtool **Price:** S$31 **Availability:** ✅ In Stock ## Summary > 🔧 Diagnose Like a Pro, Fix Like a Boss! ## Quick Answers - **What is this?** Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection by cmtool - **How much does it cost?** S$31 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/356505867-power-circuit-probe-tester-6v-24v-dc-test-light-automotive) ## Best For - cmtool enthusiasts ## Why This Product - Trusted cmtool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Fault Detection:** High-sensitivity probes pinpoint short circuits and faulty wires fast, saving you hours on troubleshooting. - • **Smart Overload Protection:** Automatic circuit breaker trips at currents above 7A, safeguarding your vehicle and tester with audible buzzer alerts. - • **Universal Voltage Compatibility:** Seamlessly diagnose all 6V to 24V automotive electrical systems across cars, trucks, boats, trailers, and motorcycles. - • **Extended Reach with 4M Test Lead:** Cover your entire vehicle effortlessly, from front to rear, without repositioning or guesswork. - • **Precision Polarity & Continuity Testing:** Instantly identify positive/negative polarity with dual-color LEDs and verify circuit continuity for flawless diagnostics. ## Overview The CMTOOL Power Circuit Probe Tester is a rugged, ABS-built automotive diagnostic tool designed for 6V-24V DC systems. Featuring overload protection with a 7A auto-trip and buzzer alert, it ensures safe testing across cars, trucks, boats, trailers, and motorcycles. Its 4-meter extended lead and high-sensitivity probes enable comprehensive vehicle circuit diagnostics, including polarity identification, continuity checks, component activation, and precise short circuit location—making it an essential tool for professionals and enthusiasts aiming for fast, reliable electrical troubleshooting. ## Description This automotive test light is suitable for diagnosis of all 6V to 24V automotive electrical systems and works well on cars, trucks, boats, trailers and motorcycles. ## Features - 【Wide Application & Overload Protection】The power circuit probe tester is made of ABS material, which is moisture-proof, high-temperature resistant and has a longer service life. It is suitable for diagnosis of all DC 6V to 24V automotive electrical systems and can work well on cars, trucks, boats, trailers, and motorcycles. The tester also has an overload protection device, When the current exceeds 7A, the circuit breaker inside the device will automatically trip and give out a buzzer prompt. - 【Polarity Test & Continuity Test】The power circuit probe tester is made of insulating material and high-quality stainless steel tip, which can help you quickly identify the positive and negative polarity of the vehicle cable and plug. When the dc circuit tester touches the positive pole, the LED should be red; when it touches the negative pole, the LED should be GREEN. The power circuit probe tester is also used to check the continuity of switches, relays, diodes, fuses, and circuits. - 【Component Activation and Testing】The automotive power circuit probe tester can activate components inside/outside the vehicle electrical system, perfect for professionals or car enthusiasts. The LED indicator light and buzzer prompt make it easy to test and check whether the component is defective or whether the rated current of the component is higher than the rated current of the car test light. - 【Grounding Test & 4M Test Lead】The electric circuit tester has a ground prompt device, if the LED indicator turns green and the buzzer sounds, it means the ground is good. If not, the LED remains red and does not beep. The automotive circuit tester is equipped with a 4M extended detection line, covering the front to the rear of the vehicle, making it easy to test the entire vehicle circuit system. - 【Tracking and Locating Short Circuit】The power circuit probe tester uses advanced high-sensitivity probes to provide you with fast and accurate detection. Using this automotive test light can save a lot of time to troubleshoot the car wiring circuit, to quickly and accurately find the faulty wire and its fault point. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B09CL7ZDZ5 | | Best Sellers Rank | #115,051 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #178 in Circuit Testers | | Brand Name | CMTOOL | | Color | Red | | Compatible Devices | Cars, Trucks, Boats, Trailers, Motorcycles | | Customer Reviews | 4.5 4.5 out of 5 stars (940) 4.5 out of 5 stars | | Included Components | Power circuit probe tester | | Item Weight | 0.33 kg | | Manufacturer | CMTOOL | | Minimum Operating Voltage | 6 volts_of_direct_current | | Model | AY-29 | | Number Of Items | 1 | | Part Number | AY-29 | | Power Source | Battery Powered | | Style Name | Circuit Testers | | Upc | 758358922504 | ## Product Details - **Brand:** CMTOOL - **Color:** Red - **Item Weight:** 0.33 Kilograms - **Power Source:** Battery Powered - **Style:** Circuit Testers ## Images ![Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection - Image 1](https://m.media-amazon.com/images/I/61RyWupGTNL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by on Reviewed in the United States July 10, 2025* Why did you pick this product vs others?:A must have for equipment mechanic or field technician workers wonders really great and the price is perfect ### ⭐⭐⭐⭐⭐ Works great! *by on Reviewed in the United States November 30, 2024* I bought this so I could bench test some headlight bulbs and it works perfect! I hate messing with any kind of wiring, but this is just what I needed. I don't know how much I will use it, but it's great to have it and not need it. Worth the purchase! ### ⭐⭐⭐⭐ Does the job *by on Reviewed in the United States January 17, 2026* Wires could be a bit longer for working at the back of the vehicle. Otherwise I'm finding this very useful. ## Frequently Bought Together - CMTOOL Power Circuit Probe Tester 6V-24V DC Test Light, Automotive Circuit Tester Car Short Finder, Component Activation, Polarity Identify, Overload Protection - 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 - 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.sg/products/356505867-power-circuit-probe-tester-6v-24v-dc-test-light-automotive](https://www.desertcart.sg/products/356505867-power-circuit-probe-tester-6v-24v-dc-test-light-automotive) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-26*