--- product_id: 543258270 title: "P200 Power Circuit Probe Kit - Test Light Automotive Circuit Tester Circuit Breaker Finder Tool, Relay Tester Multimeter, Oscilloscope, Fuel Injector Tester - 9~30V" brand: "topdiag" price: "VT54789" currency: VUV in_stock: true reviews_count: 12 category: "Top Diag" url: https://www.desertcart.vu/products/543258270-p200-power-circuit-probe-kit-test-light-automotive-circuit-tester store_origin: VU region: Vanuatu --- # 9~30V wide voltage range Multimeter + Oscilloscope modes 0~5V adjustable power supply P200 Power Circuit Probe Kit - Test Light Automotive Circuit Tester Circuit Breaker Finder Tool, Relay Tester Multimeter, Oscilloscope, Fuel Injector Tester - 9~30V **Brand:** topdiag **Price:** VT54789 **Availability:** βœ… In Stock ## Summary > πŸ”§ Diagnose like a pro, fix like a boss β€” never miss a beat under the hood! ## Quick Answers - **What is this?** P200 Power Circuit Probe Kit - Test Light Automotive Circuit Tester Circuit Breaker Finder Tool, Relay Tester Multimeter, Oscilloscope, Fuel Injector Tester - 9~30V by topdiag - **How much does it cost?** VT54789 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/543258270-p200-power-circuit-probe-kit-test-light-automotive-circuit-tester) ## 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 - β€’ **Dual-Mode Precision Testing:** Switch seamlessly between multimeter and oscilloscope for detailed waveform analysis. - β€’ **Smart Safety & Global Reach:** Auto short-circuit & overload protection plus 18+ language support for worldwide professionals. - β€’ **All-in-One Diagnostic Powerhouse:** Test voltage, injectors, diodes, continuity & polarity with one upgradeable tool. - β€’ **Fuel Injector & Relay Specialist:** Quickly identify engine idling issues and relay faults to keep your vehicle running smooth. - β€’ **Component Activation with 20A Output:** Activate vehicle parts on demand with positive/negative modes and three activation types. ## Overview The Topdiag P200 Power Circuit Probe Kit is a versatile automotive diagnostic tool supporting 9-30V systems. It combines multimeter and oscilloscope functions to test voltage, continuity, fuel injectors, relays, and more. Featuring a 0-5V adjustable power supply and component activation up to 20A, it ensures fast, precise diagnostics with built-in circuit breaker protection. Compatible with cars, trucks, motorcycles, and boats, and supporting 18+ languages, it’s designed for professionals demanding speed, accuracy, and reliability. ## Description Topdiag P200 Power Circuit Probe Kit - Test Light Automotive Circuit Tester Circuit Breaker Finder Tool, Relay Tester Multimeter, Oscilloscope, Fuel Injector Tester - 9~30V: desertcart.com: Tools & Home Improvement Review: Worked exactly as I hoped and then some. Fixed a Diagnosis I was chasing for days! - Absolutely cannot recommend this tool enough. It works exactly as I hoped and has loads of features. Wasn't too hard to figure out. Plenty of cable length so no fear of it being annoying to use. The ground cable is a little short so make sure you've got some testing probes and wires for adjustments. Was chasing a No fuel pump No start condition that was hiding for days. Eventually found the culprit hidden in the Fuel pump assembly that holds the fuel pump together and allows the chassis harness to plug into it. Had a hidden arc damage in the connector on the assembly. This tool ruled it out by simulating power to the pumps making sure they were good but also fully testing the assembly to see if it worked. Solved the mystery and saved me a major headache. Would highly recommend this as it made my life so much easier. Yes it did come with a case too! The P150 model Fuel Pump testing worked flawless and was able to monitor Voltage as well. Review: Probe - Great tool with out spending a lot of money in the original brand highly recommended ## Features - [P200 Power Circuit Probe Tool] Topdiag P200 probe tester can be used to test voltage, fuel injector, diode, continuity, polarity, etc, which is the only upgradeable power circuit tester on the market. It is a tool for quickly testing all 9V-30V electronic systems. The test time is greatly shortened, convenient, fast and intelligent! - [Multimeter & Oscilloscope Mode] There are two powerful functions of P200 power circuit probe kit - one is the multimeter mode, which can quickly test DC voltage, resistance, continuity, diode, current and frequency; the other function is oscilloscope, which can quickly analyzes and diagnoses the problems of vehicles by display electrical waveforms on the screen. - [Fuel Injector Testing] If the fuel injector is damaged, that will easily lead to engine idling instability, fuel consumption increase, cause engine shock. Also, Topdiag P200 power tester also a relay tester automotive kit, which will make it more convenient for the owner to check whether the fuel injector and other parts of the vehicle in a good condition regularly. - [Component Activation Function] P200 circuit tester can activating components of vehicles, which is used to generate activation signals to the detected components, such as activating lights. There are two activation methods, positive activation and negative activation. The maximum current through activation can reach 20A, There are the three activation modes: MOMENT, LACH and PULSE. - [0~5V Adjustable Power Supply] Togdiag P200 is a power circuit probe test kit for all cars, so it can adjust 0~5V output voltage to check the circuit connection and it is also useful to check the wiring to the ECU/ ECM, which can ensure the safety of the tested vehicles. - [Positive & Negative Test] Use the P200 electric tester's probe to find the positive and negative of the power supply. If it is positive,the screen will display the probe voltage and the buzzer will alarm. If it is negative, the grounding icon is displayed on the screen. - [Circuit Breaker & Overloaded Protection] With the function of automatic short-circuit protection and overloaded protection, you can think of the Topdiag P200 test probe as a digital circuit breaker finder, its internal circuit breaker will open circuit or trip automatically if it becomes overloaded. - [Multiple Languages & Wide Application] Our P200 automotive power circuit probe tester support 18+ languages, such as English, Spanish, German, Polish, Russian, Vietnamese, Arabic, Italian, Portuguese, French, Korean, Japanese, Indonesian and Chinese, etc. Topdiag P200 electrical tester is compatible with all 9V-30V vehicle electrical systems - cars, excavators, trucks, boats and motorcycles, etc. If you have any suggestions or problems with our products, please feel free to let us know. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BYNLQX5P | | Best Sellers Rank | #48,775 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #91 in Circuit Testers | | Brand Name | TopDiag | | Color | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (878) | | Included Components | 1*P200/2*Battery Clamps/1*Manual | | Item Dimensions | 12 x 4.33 x 9.25 inches | | Manufacturer | Topdiag | | Measurement Type | Multimeter | | Minimum Operating Voltage | 9 Volts | | Model | P200 | | Power Source | Battery Powered | | Specification Met | CE, ETL, NIST, UL | | Style Name | P200 | | UPC | 753955453673 | ## Product Details - **Brand:** TopDiag - **Color:** Black - **Item dimensions L x W x H:** 12 x 4.33 x 9.25 inches - **Power Source:** Battery Powered - **Style:** P200 ## Images ![P200 Power Circuit Probe Kit - Test Light Automotive Circuit Tester Circuit Breaker Finder Tool, Relay Tester Multimeter, Oscilloscope, Fuel Injector Tester - 9~30V - Image 1](https://m.media-amazon.com/images/I/6183spsX-pL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: What does the product include?** A: Hi, the product includes a Topdiag P200, 2 battery clips, 3 probes, an user’s manual and 20ft extension cable. **Q: How does it find a short circuit?** A: Thanks for the inquiry, if you are tracing a short circuit in the brake light circuit, you will know that the wiring harness must pass through the wire at the door sill, locate the color-coded wire in the harness and expose it. While in Component Activation interface, select MOMENT mode. Use the probe tip to contact the marked wire. Press the "UP" button to trigger power supply. If the circuit breaker tripped, you have verified the shorted wire. Cut the wire and power supply each end with probe tip again, follow the wire in the shorted direction and repeat this process until the short is located. **Q: Can the house current be tested?** A: Thanks for your inquiry, P200 is an electrical circuit tester which tests cars, minibus, SUV, pickup truck, motorcycle, Jeep, etc, can not be used to test the current in the house. **Q: How to test trailer lights?** A: Hi, thanks for your question! When the probe is in multimeter or SMART Test , connect the probe auxiliary ground lead to the trailer light, and insert the probe tip into the OBD socket to display the current voltage. With this method you can check the function and direction of the connector and trailer lights. If you find the trailer light connection correctly, you can use the "Component Activation" function to test whether the trailer light is working or not working. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked exactly as I hoped and then some. Fixed a Diagnosis I was chasing for days! *by A***A on August 27, 2024* Absolutely cannot recommend this tool enough. It works exactly as I hoped and has loads of features. Wasn't too hard to figure out. Plenty of cable length so no fear of it being annoying to use. The ground cable is a little short so make sure you've got some testing probes and wires for adjustments. Was chasing a No fuel pump No start condition that was hiding for days. Eventually found the culprit hidden in the Fuel pump assembly that holds the fuel pump together and allows the chassis harness to plug into it. Had a hidden arc damage in the connector on the assembly. This tool ruled it out by simulating power to the pumps making sure they were good but also fully testing the assembly to see if it worked. Solved the mystery and saved me a major headache. Would highly recommend this as it made my life so much easier. Yes it did come with a case too! The P150 model Fuel Pump testing worked flawless and was able to monitor Voltage as well. ### ⭐⭐⭐⭐⭐ Probe *by M***N on February 9, 2026* Great tool with out spending a lot of money in the original brand highly recommended ### ⭐⭐⭐⭐⭐ Great *by B***N on April 3, 2026* Great for the price ## Frequently Bought Together - Topdiag P200 Power Circuit Probe Kit - Advanced Automotive Electrical System Multimeter, Oscilloscope, Automotive Circuit Tester, Fuel Injector Activator, Short Circuit Finder - 9~30V - POWER PROBE Intelligent Electric Circuit Tracer - RUNCCI-YUN 15pcs back probe pins,Multimeter probe pins,Test Lead Back Probe Automotive Back Probe for Car Repairing and Laboratory Electric Multimeter Testing (Red Blue Black Yellow Green) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/543258270-p200-power-circuit-probe-kit-test-light-automotive-circuit-tester](https://www.desertcart.vu/products/543258270-p200-power-circuit-probe-kit-test-light-automotive-circuit-tester) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-08*