--- product_id: 585901682 title: "VDIAGTOOL V200 Pro Automotive Circuit Tester, Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC/DC Trailer Relay Fuse Test for 99% Cars" brand: "vdiagtool" price: "₱15660" currency: PHP in_stock: true reviews_count: 8 category: "Vdiagtool" url: https://www.desertcart.ph/products/585901682-vdiagtool-v200-pro-automotive-circuit-tester-power-circuit-probe-tester store_origin: PH region: Philippines --- # 20ft + 20ft extension cables for max reach 12/24V powered, no external battery needed (Mode I) Multi-mode: voltage, resistance, diode, breaker finder VDIAGTOOL V200 Pro Automotive Circuit Tester, Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC/DC Trailer Relay Fuse Test for 99% Cars **Brand:** vdiagtool **Price:** ₱15660 **Availability:** ✅ In Stock ## Summary > ⚡ Diagnose Smarter, Not Harder — The Ultimate Automotive Circuit Sidekick ## Quick Answers - **What is this?** VDIAGTOOL V200 Pro Automotive Circuit Tester, Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC/DC Trailer Relay Fuse Test for 99% Cars by vdiagtool - **How much does it cost?** ₱15660 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/585901682-vdiagtool-v200-pro-automotive-circuit-tester-power-circuit-probe-tester) ## Best For - vdiagtool enthusiasts ## Why This Product - Trusted vdiagtool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Overload Protection:** Built-in auto shutoff safeguards your car’s electronics and the tester itself—work worry-free. - • **All-in-One Circuit Mastery:** Combine power probe & breaker finder in one sleek tool—ditch the clutter, diagnose faster. - • **Ultimate Reach & Flexibility:** 40 feet of extension cables let you test anywhere around your vehicle without hassle or limits. - • **Activate & Trace with Precision:** Energize components and trace hidden wire breaks without damaging insulation—DIY like a pro. - • **Trusted by Experts & DIYers Alike:** Endorsed by top technicians, backed by 3-year warranty & lifetime support—join the elite troubleshooting club. ## Overview The VDIAGTOOL V200 Pro is a professional-grade 2-in-1 automotive circuit tester and breaker finder designed for 12-42V systems. It features multi-mode testing including AC/DC voltage, resistance, diode, continuity, and polarity checks, plus component activation and signal tracing. Powered directly from your vehicle’s battery or cigarette lighter (no external battery needed for Mode I), it includes 40 feet of extension cables for unmatched reach. With built-in overload protection and a 3-year warranty, it’s a trusted, versatile tool for DIYers, electricians, and technicians to quickly locate shorts, opens, and faulty circuits across nearly all vehicles, saving time and costly repairs. ## Description Product description Exclusive! Combine 2 Tools: Power Circuit Probe Tester+Short Breaker Finder Tool All-in-one Circuit Tester with Breaker Finder Tool The V200 Pro is here to simplify the process of fixing the issues in 6-30V electrical systems: Diagnose & Pinpoint electrical problems, Active Component, Continuity Test, Locate shorts, Opens, & Bad connections accurately, Quick Self-Test & Polarity Identification, Overload Protection, etc. Why V200 Pro Outperforms All Other Testers on the Market Protects Your Vehicle While Protecting Itself Smart Auto Circuit Breaker: Overload Protection That Also Serves as a Tester With built-in short-circuit defense, the internal breaker trips under excessive load. This design not only protects the tool from overload but also provides added utility as an effective circuit testing device. Why You'll Love the V200 Pro?→TOOL1: Circuit Tester +TOOL2: Short Breaker Finder Find Faulty Circuits Without the Guesswork: Quickly identify open circuits and trace wires in cars, RVs, or boats. You can locate the issue without damaging the insulation or having to rip apart the wiring. Simplify Diagnosing Power Issues: Whether you're testing AC or DC voltage, the V200 Pro gives you the insights you need to check the power in automotive systems, RVs, boats, or other battery-powered equipment. It's easy to see where power loss or malfunction is happening. Test Diodes and Resistance: The V200 Pro automotive circuit tester makes it simple to test diodes and resistance levels in circuits, which helps you quickly pinpoint charging and electrical faults. It's a handy tool for checking components in your vehicle’s electrical system, or even in your home’s solar setup. Check for Continuity and Correct Polarity: Ensure everything is wired correctly and that there are no hidden breaks in your wiring. Whether you’re dealing with a car, RV, or any low-voltage electrical system, you can confidently diagnose potential issues. Activate Components with Ease: Need to troubleshoot your car lights, wipers, or even the fuel injectors? The V200 Pro helps you activate and test those components to quickly pinpoint any problems. Ensure Relays, Fuses, and Trailer Lights Work Properly: Test your relays, fuses, and trailer lights to ensure everything is functioning as it should in your vehicle or RV. Find Circuit Breakers and Open Connections : Identifying a broken circuit or faulty connection is now easier. The V200 Pro’s circuit breaker finder simplifies the process and helps you get the job done quickly. Track Signals to Solve Problems: Test sensors and signal circuits to identify electrical issues that may be affecting your vehicle or other devices, saving you time and effort in your automotive diagnostic process. Why Choose VDIAGTOOL V200 Pro? Its ability to test multiple functions in one device makes it practical and efficient for everyday use. With the V200 Pro Automotive Power Circuit Probe Tester Breaker Finder Tool Kit, you’ll spend less time troubleshooting and more time enjoying your vehicle or device, knowing that everything is working as it should. (NOT designed for use with household 220V circuits.) The Integrated Circuit Solution: V200 Pro Finds Shorts and Opens with One Device More Circuit Tests AC/DC/Resistance/Diode,Polarity Test ✔Continuity, Ground Test ✔Signal Circuit Test and more. RANGE DC : 0-65V; R: 0-100 kΩ; Rated current: 1-10 amps; Frequency response of sound passage: 0-10Khz ✔ Automobiles、SUV、RVs、Bus、Trucks、Tractors、Steamer、Boats、Motorbike About Vdiagtool Designed by professional mechanics with over 20 years of experience in the automotive repair industry. Every device is crafted with practicality in mind, eliminating unnecessary costs or features that don't contribute directly to performance. About Vdiagtool Designed by professional mechanics with over 20 years of experience in the automotive repair industry. Every device is crafted with practicality in mind, eliminating unnecessary costs or features that don't contribute directly to performance. What do I do if my VDIAGTOOL V200 Pro Power Cirtur Probe Tester & Breaker Finder Kit is broken? We offer 3 Year War ranty and Lifetime Af ter-s ale service. If the unit you had is defective or malfunctions, please reach us via vdiagtool2 @ outl ook c om directly, we can send you a new one to replace it without 24hrs. What do I do if my VDIAGTOOL V200 Pro Power Cirtur Probe Tester & Breaker Finder Kit is broken? We offer 3 Year War ranty and Lifetime Af ter-s ale service. If the unit you had is defective or malfunctions, please reach us via vdiagtool2 @ outl ook c om directly, we can send you a new one to replace it without 24hrs. How do I connect my devices for testing? In Mode I, you’ve just activated Circuit Probe Tester which can be powered by either connecting to cigarette lighter/car’s battery,no external battery needed! Please be reminded that the screen of the Mode I won’t light while switching to Mode II. How do I connect my devices for testing? In Mode I, you’ve just activated Circuit Probe Tester which can be powered by either connecting to cigarette lighter/car’s battery,no external battery needed! Please be reminded that the screen of the Mode I won’t light while switching to Mode II. Does it come with a battery in the Mode II-breaker finder tool? Yes. Mode II-breaker Tester is powered by 1pcs 9V Battery. Please check whether the battery is normal before use. When this part is unused, suggested to remove the battery directly to avoid draining the battery power. Does it come with a battery in the Mode II-breaker finder tool? Yes. Mode II-breaker Tester is powered by 1pcs 9V Battery. Please check whether the battery is normal before use. When this part is unused, suggested to remove the battery directly to avoid draining the battery power. Why is the volume low or even not working when it is mode II? 1. When the signal is not strong enough, the volume will be low, please find a strong signal and try to turn the signal up to the highest level; 2. Maybe the battery power supply is insufficient, please replace the battery and try again. Why is the volume low or even not working when it is mode II? 1. When the signal is not strong enough, the volume will be low, please find a strong signal and try to turn the signal up to the highest level; 2. Maybe the battery power supply is insufficient, please replace the battery and try again. Review: An excellent tool for diagnosing electical issues at a great price! - This probe will allow you to easily test automobile, RV, boat, and trailer wiring. It is packed with features that allow the probe to test voltage, resistance, and perform signal tracing. You will be able to energize electical parts like lamps and relays with the probe. The tool comes packed in a nice padded case that holds the probe, probe tip, breaker test probe, cigarette lighter adapter, a 20 foot extension cable, and battery terminal clamps. I first learned to operate the tool by performing some simple tests. Connecting the probe to the vehicle's power source is easy. You can connect right at the battery using the included clamps or with the lighter plug. By placing the the probe into Mode I, it can measure the battery voltage by pressing the rocker switch forward where the digital display will then display the positive voltage. Pressing the red button will scroll through the tool's feature set - DC voltage, AC voltage/frequency, resistance, and diode testing. I measured the resistance of my old VW's ignition coil with the probe (you can see the measurement in one of my photos). This is a useful feature for measuring resitance of relay coils, carb thermostats, and idle solenoids. When you push the rocker switch forward, the probe tip is connected to positive battery voltage. You can use this feature to power and test bulbs, relays, and solenoids before you install them into the vehicle (or check them while they are in place). The probe tip can pierce wiring insulation to allow testing without disconnecting wires. I especially appreciated the inclusion of a 20 foot power extension cable that will allow you to move the probe to far reaches of the vehicle. There is no need to make power connections at another part of the vehicle. There is a signal tracing feature when the tool is placed into Mode II. This will allow a signal from the probe to be placed onto a wire and you can then use the breaker probe to move along the suspected wire. A tone is heard from the tester as you move along the wire and will cease when you reach the breakpoint. I used this feature to finally locate the reason the rear lift gate on my Ford Escape would not raise with the foot activation. I found a break in the sensor wire right as it entered a multi-wire connector. I was able to solder a wire around the connector to get the liftgate to work once again. The probe paid for itself on just that one job. A dealership repair would have cost hundreds of dollars. The instruction manual is a bit hard to understand, but there are several excellent Youtube videos that review this tool and show how it can be used. If you compare this tool to the PowerProbe 3 or 4, you will see it works very similar but at a much reduced price. I really like this tool and look forward to finding other uses for it. Review: How did I do without this tool for so long? This is a game changer! - I am a serious DIY automotive enthusiast. I am also an electronics engineer. I purchased the Vdiagtool V200 Pro to assist me with a vexing electrical problem. I bought the V200 Pro after watching a YouTube video and anxiously awaited receiving it. I was impressed with the obvious build quality. The wires are well insulated and flexible. It feels great in the hand. I have a 2010 Ford F150 with a 5.4L V8. I had it parked in my back yard and rodents got into the engine compartment and chewed up some of the wiring. It also had a problem with the AC clutch compressor being inoperable. The engine ran poorly with multiple misses and engine light came on and could not be reset. I used a code scanner to determine three of the injectors were not working. The wiring goes from the injector into a harness that disappears into a loom. I placed the V200 into AC mode and started the car. I then went to the injector connector and touched the terminals of the injector…. nothing. I then used a small terminal to connect the red wire of the probe to the injector and set it to signal trace mode. I grounded the black wire. I then ran the signal tracer over the wiring harness while listening to the “warble.” It took less than 60 seconds to trace the harness to the point where the signal stopped. It was buried inside a complicated and loaded harness. Closer inspection showed there were visual indications of the wire chewed in two pieces on the bottom of the harness by those pesky rats. I would have had great difficulty finding it with another method. I was able to repair the harness by cutting the loom and soldering the wires back together. I then found two other wires the same way. The engine was now running great! No misfires and the injectors all working! I then began to play with the V200 in its normal voltage measuring function. The engine was running and I noticed that the voltage of the battery was 12.2 VDC instead of the expected 14.4 volts. Those pesky rats were at it again. With the help of the V200 I quickly located the wire to the field terminal of the alternator. It was chewed at the connector. A quick repair and all is well. Having such a good day I decided to look at the nonfunctional AC compressor. I pulled the AC relay under the hood. Using the V200, I probed the coil terminal and determined it was not being actuated when the AC was turned on. I then moved to the relay output and used the V200 to simulate the relay operation by injecting battery voltage into the output terminal. The compressor clutch immediately engaged. The problem was evident. The compressor was prevented from operating because it was so low on refrigerant that the low-pressure sensor prevented it from turning on. In this vehicle, you cannot add refrigerant without the compressor running. I used the V200 to activate the compressor, and I added R134. In a couple of minutes, I was ready to go and was able to replace the relay, which then operated on its own. The bottom line is that I very much like the V200 Pro. It is a great tool. Well made and very versatile. It made a tedious task easy and saved me much time and effort. It is a well-made tool and has earned a top spot in my toolbox. It will easily perform almost any electrical diagnostics on an automobile. It will not replace my Fluke multimeter for critical measurements, but that is not its purpose. This makes troubleshooting wiring for almost any automotive circuit. Taillights to wipers, blowers to power windows, relays to seat controls. This is now my go-to favorite! I have oscilloscopes and meters of all types, but nothing works better for me when working on automotive wiring. I plan to buy another for my son for Christmas. ## Features - 【ALL-IN-ONE TOOL FOR ANY CIRCUIT PROBLEM DIAGNOSIS】V200 Pro automotive circuit tester covers all circuit tests: ✔Circuit Breaker/Open Test ✔Tracing Wire ✔AC/DC Voltage Test ✔Diode Test ✔Resistance Test ✔Polarity Test ✔Continuity Test ✔Ground Test ✔Activate Components ✔Signal Circuit Test ✔Relay, Fuse, Trailer Light Test. You can quickly & easily Locate short circuits, open connections, broken wires, current leaks and even trace wires. Get this essential circuit tester today and save your time and costly trip to a dealership! - 【TOOL 1: COMPREHENSIVE POWER CIRCUIT TESTER】Switch to Mode I, you’ve just activated Power Circuit Probe Tester which supports 4 working modes:AC/DC Voltage, Resistance and Diode. The electrical probe tester allows users to check 12V 24V electrical system instantly, tells you whether the wire or circuit is live, and which side of the circuit you are on, positive or negative. NOTE: This circuit tester can be powered by either connecting to cigarette lighter/vehicle’s battery,no external battery needed! - 【TOOL 2: LOCATING BREAKER POINT EFFICIENTLY】Switch the V200 Pro All-In-One Circuit Tester Kit to Mode II, you will be able to use the breaker finder which can easily locate the circuit breaker point, open connections, broken wires, current leaks with tone change, even trace wire/cable without damaging the insulation. This circuit breaker finder tool works on all kinds of vehicle circuit issues such as those found in car, SUV, mini van, truck, tractor, boat & RV, with voltages between 6 and 42 volt DC. - 【COMPONENT ACTIVATION & SENSOR/SIGNAL CIRCUIT TEST】VDIAGTOOL V200 Pro power circuit probe kit can generate activation signals to electrical components like car lights, motors, windshield wipers, radiator fans, relay, fuel injector and etc to troubleshoot electrical problems; locate auto short circuits if you keep getting blown fuses and also test various sensors, signal circuits to pinpoint the root cause to electrical issues when you have extracted DTCs from vehicle ECUs. - 【OVERLOAD PROTECTION TO PROTECT CAR ELECTRONICS】 This automotive electrical tool comes with short circuit protection. Whenever it gets overloaded, it just gonna shut down and restart, which is a safe measure to protect the device and car electronics. Useful Tip: You can also use overload protection feature to test short circuit conveniently. NOTE: If you received defective unit or it malfunctions, please reach us via ✔vdiagtool2 @ outl ook c om for hassle-fr*ee replacement any time! - 【20FT EXTENSION CORD TO WORK ANYWHERE AROUND THE VEHICLE】 V200 Pro power circuit probe tester comes with 20 feet long cord plus 20 feet extension cord. Combining the feature that it can be powered by the cigarette lighter, and alligator clip for convenient ground connection, you can test electrical circuit system anywhere around the vehicle. No more worrying about short cord while testing electrical system! ✔NOTE: Mode II-circuit breaker tester is powered by 1pcs 9V Battery! - 【APPROVAL BY P.P. 10-YEAR OFFICIAL TECHNICAL ENGINEER , 3-YEAR WA*RRANTY】Countless auto electrical specialists recommend VDIAGTOOL power circuit tester, and even including P.P. official technical engineers. It accomplishes everything that P.P.3/P.P.4 does for half the price! We offer 3-year wa*rranty, Lifet*ime technical assistance, 60 Days No-Question-asked NEW REPLACEMENT OR RE*FUND. Any questions or concerns, please reach us via ✔vdiagtool2 @ outl ook c om. - 【One-Step Solution for Auto Electrical System Test】V200 Pro meets the needs of 2 products at one time. Simply and quickly switch from the power circuit probe tester functional mode to the circuit breaker finder tool mode with one click. There is no need to get an extra tool to judge continuity of the cables/wire and diagnose the breaker point. This convenient and efficient circuit instrument is a great choice for DIYERS,electrician and technician. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CKQV587H | | Best Sellers Rank | #18,883 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #34 in Circuit Testers | | Brand | VDIAGTOOL | | Brand Name | VDIAGTOOL | | Color | Blue | | Customer Reviews | 4.6 out of 5 stars 667 Reviews | | Included Components | Probe Tester kit; Cigarette lighter Adapter; Extension Cable(20ft.);9V Battery | | Item Dimensions | 1.88 x 0.98 x 7 inches | | Item Weight | 1.48 Kilograms | | Item dimensions L x W x H | 1.88 x 0.98 x 7 inches | | Manufacturer | VDIAGTOOL | | Maximum Operating Voltage | 42 Volts | | Minimum Operating Voltage | 12 Volts (DC) | | Model | V200 Pro | | Power Source | Powered By Vehicle Battery Or Cigarette Lighter. | | Specification Met | CE, RoHS, UL | | Style | 2-in-1 Automotive Electrical Tool Kit with 20ft+20ft Extension Cable; All-in-one Power Circuit Probe Tester & Short Breaker Finder Tool; Accurate Automotive Circuit Tester recommend by hot youtubers; Popular Addtion to The Toolbox; DIYers, Electrician, Technician, Maintenance Worker; Built-in Flashlight; Fuse Saver Tech; Non-invasive Wire Tracking Style 2-in-1 Automotive Electrical Tool Kit with 20ft+20ft Extension Cable; All-in-one Power Circuit Probe Tester & Short Breaker Finder Tool; Accurate Automotive Circuit Tester recommend by hot youtubers; Popular Addtion to The Toolbox; DIYers, Electrician, Technician, Maintenance Worker; Built-in Flashlight; Fuse Saver Tech; Non-invasive Wire Tracking See more | | Style Name | 2-in-1 Automotive Electrical Tool Kit with 20ft+20ft Extension Cable; All-in-one Power Circuit Probe Tester & Short Breaker Finder Tool; Accurate Automotive Circuit Tester recommend by hot youtubers; Popular Addtion to The Toolbox; DIYers, Electrician, Technician, Maintenance Worker; Built-in Flashlight; Fuse Saver Tech; Non-invasive Wire Tracking | ## Product Details - **Brand:** VDIAGTOOL - **Color:** Blue - **Item Weight:** 1.48 Kilograms - **Power Source:** Powered By Vehicle Battery Or Cigarette Lighter. ## Images ![VDIAGTOOL V200 Pro Automotive Circuit Tester, Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC/DC Trailer Relay Fuse Test for 99% Cars - Image 1](https://m.media-amazon.com/images/I/71hZgGqwk7L.jpg) ## Questions & Answers **Q: About Vdiagtool** A: Designed by professional mechanics with over 20 years of experience in the automotive repair industry. Every device is crafted with practicality in mind, eliminating unnecessary costs or features that don't contribute directly to performance. **Q: What do I do if my VDIAGTOOL V200 Pro Power Cirtur Probe Tester & Breaker Finder Kit is broken?** A: We offer 3 Year War ranty and Lifetime Af ter-s ale service. If the unit you had is defective or malfunctions, please reach us via vdiagtool2 @ outl ook c om directly, we can send you a new one to replace it without 24hrs. **Q: How do I connect my devices for testing?** A: In Mode I, you’ve just activated Circuit Probe Tester which can be powered by either connecting to cigarette lighter/car’s battery,no external battery needed! Please be reminded that the screen of the Mode I won’t light while switching to Mode II. **Q: Does it come with a battery in the Mode II-breaker finder tool?** A: Yes. Mode II-breaker Tester is powered by 1pcs 9V Battery. Please check whether the battery is normal before use. When this part is unused, suggested to remove the battery directly to avoid draining the battery power. **Q: Why is the volume low or even not working when it is mode II?** A: 1. When the signal is not strong enough, the volume will be low, please find a strong signal and try to turn the signal up to the highest level; 2. Maybe the battery power supply is insufficient, please replace the battery and try again. ## Customer Reviews ### ⭐⭐⭐⭐⭐ An excellent tool for diagnosing electical issues at a great price! *by B***E on February 19, 2024* This probe will allow you to easily test automobile, RV, boat, and trailer wiring. It is packed with features that allow the probe to test voltage, resistance, and perform signal tracing. You will be able to energize electical parts like lamps and relays with the probe. The tool comes packed in a nice padded case that holds the probe, probe tip, breaker test probe, cigarette lighter adapter, a 20 foot extension cable, and battery terminal clamps. I first learned to operate the tool by performing some simple tests. Connecting the probe to the vehicle's power source is easy. You can connect right at the battery using the included clamps or with the lighter plug. By placing the the probe into Mode I, it can measure the battery voltage by pressing the rocker switch forward where the digital display will then display the positive voltage. Pressing the red button will scroll through the tool's feature set - DC voltage, AC voltage/frequency, resistance, and diode testing. I measured the resistance of my old VW's ignition coil with the probe (you can see the measurement in one of my photos). This is a useful feature for measuring resitance of relay coils, carb thermostats, and idle solenoids. When you push the rocker switch forward, the probe tip is connected to positive battery voltage. You can use this feature to power and test bulbs, relays, and solenoids before you install them into the vehicle (or check them while they are in place). The probe tip can pierce wiring insulation to allow testing without disconnecting wires. I especially appreciated the inclusion of a 20 foot power extension cable that will allow you to move the probe to far reaches of the vehicle. There is no need to make power connections at another part of the vehicle. There is a signal tracing feature when the tool is placed into Mode II. This will allow a signal from the probe to be placed onto a wire and you can then use the breaker probe to move along the suspected wire. A tone is heard from the tester as you move along the wire and will cease when you reach the breakpoint. I used this feature to finally locate the reason the rear lift gate on my Ford Escape would not raise with the foot activation. I found a break in the sensor wire right as it entered a multi-wire connector. I was able to solder a wire around the connector to get the liftgate to work once again. The probe paid for itself on just that one job. A dealership repair would have cost hundreds of dollars. The instruction manual is a bit hard to understand, but there are several excellent Youtube videos that review this tool and show how it can be used. If you compare this tool to the PowerProbe 3 or 4, you will see it works very similar but at a much reduced price. I really like this tool and look forward to finding other uses for it. ### ⭐⭐⭐⭐⭐ How did I do without this tool for so long? This is a game changer! *by W***. on March 10, 2024* I am a serious DIY automotive enthusiast. I am also an electronics engineer. I purchased the Vdiagtool V200 Pro to assist me with a vexing electrical problem. I bought the V200 Pro after watching a YouTube video and anxiously awaited receiving it. I was impressed with the obvious build quality. The wires are well insulated and flexible. It feels great in the hand. I have a 2010 Ford F150 with a 5.4L V8. I had it parked in my back yard and rodents got into the engine compartment and chewed up some of the wiring. It also had a problem with the AC clutch compressor being inoperable. The engine ran poorly with multiple misses and engine light came on and could not be reset. I used a code scanner to determine three of the injectors were not working. The wiring goes from the injector into a harness that disappears into a loom. I placed the V200 into AC mode and started the car. I then went to the injector connector and touched the terminals of the injector…. nothing. I then used a small terminal to connect the red wire of the probe to the injector and set it to signal trace mode. I grounded the black wire. I then ran the signal tracer over the wiring harness while listening to the “warble.” It took less than 60 seconds to trace the harness to the point where the signal stopped. It was buried inside a complicated and loaded harness. Closer inspection showed there were visual indications of the wire chewed in two pieces on the bottom of the harness by those pesky rats. I would have had great difficulty finding it with another method. I was able to repair the harness by cutting the loom and soldering the wires back together. I then found two other wires the same way. The engine was now running great! No misfires and the injectors all working! I then began to play with the V200 in its normal voltage measuring function. The engine was running and I noticed that the voltage of the battery was 12.2 VDC instead of the expected 14.4 volts. Those pesky rats were at it again. With the help of the V200 I quickly located the wire to the field terminal of the alternator. It was chewed at the connector. A quick repair and all is well. Having such a good day I decided to look at the nonfunctional AC compressor. I pulled the AC relay under the hood. Using the V200, I probed the coil terminal and determined it was not being actuated when the AC was turned on. I then moved to the relay output and used the V200 to simulate the relay operation by injecting battery voltage into the output terminal. The compressor clutch immediately engaged. The problem was evident. The compressor was prevented from operating because it was so low on refrigerant that the low-pressure sensor prevented it from turning on. In this vehicle, you cannot add refrigerant without the compressor running. I used the V200 to activate the compressor, and I added R134. In a couple of minutes, I was ready to go and was able to replace the relay, which then operated on its own. The bottom line is that I very much like the V200 Pro. It is a great tool. Well made and very versatile. It made a tedious task easy and saved me much time and effort. It is a well-made tool and has earned a top spot in my toolbox. It will easily perform almost any electrical diagnostics on an automobile. It will not replace my Fluke multimeter for critical measurements, but that is not its purpose. This makes troubleshooting wiring for almost any automotive circuit. Taillights to wipers, blowers to power windows, relays to seat controls. This is now my go-to favorite! I have oscilloscopes and meters of all types, but nothing works better for me when working on automotive wiring. I plan to buy another for my son for Christmas. ### ⭐⭐⭐⭐⭐ Great tool for troubleshooting electrical wiring *by D***L on February 20, 2024* I found this to be a very helpful tool to sort out problems with wiring. This made finding a broken wire in a harness much faster and easier than with a multimeter, loose wires and alligator clips. I first used it to find a break in a wiring harness on a motorcycle which you can see in my video. I found the break in less than a minute with the tester and without pulling everything apart. When using the probe the screen turns green showing you're touching a ground. A hot wire turns it red and shows the voltage. It also has a handy feature which allows you to momentarily put voltage to the tip of the tester or ground it to check the wiring or the device. This could be really handy if you're checking trailer lights. And with the 2- 20' cables, it give you a lot of distance to reach a long distance. The led lights on the tool are nice when you're trying to see in dark spaces without having a flashlight. It will do voltage tests for AC/DC, polarity, continuity and diode tests. But for me the most useful is for finding broken wires or checking continuity over a long distance. I've spent a lot of time in the past trying to track down a broken internal wire on a harness and this will make short work of it. It takes power off the vehicle battery using alligator clips provided or the cigarette lighter plug from the kit. It has a built in breaker which resets after about 15 seconds, so if you accidentally hit the wrong polarity you won't damage the tool. But you do need to be careful if you use the probe to push power to a device. You would want to be careful around automotive computers with the probe and pushing and voltage. I even used it for an application it wasn't really designed for. I needed to trace some wires in my house walls and ceiling. Using a 12 volt power pack I was able to trace both ends of the wires for a continuity check using the V200 tester. Of course I had the breaker shut off and the wires were disconnected from their terminals before I tested. I was able to figure out which wires went where in minutes. Much quicker and easier than what I would have done in the past. It would be nice if it could be used for higher AC voltages. But overall I found it quite helpful for sorting out DC wiring on vehicles. And it can also be used for low AC voltage checks which would be helpful with automotive applications. I'm quite please with this tool and I'm sure I have friends that will want to borrow it or buy one for themselves! ## Frequently Bought Together - VDIAGTOOL V200 Pro Automotive Power Circuit Probe Tester Breaker Finder Tool, 12/24V Electrical Open Short Circuit Finder, Wire Tracer, AC DC Voltage Trailer Relay Fuse Test - SWANLAKE 22PCS Back Probe Kit, Back Probe Pin Kit - Autel PowerScan Automotive Circuit Tester, Power Circuit Probe Tool, 12-24V Electrical Short Open Breaker Circuit Finder, AC/DC Current Resistance, Duty Cycle, & 20FT Extension Cord, for 99% Cars --- ## 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.ph/products/585901682-vdiagtool-v200-pro-automotive-circuit-tester-power-circuit-probe-tester](https://www.desertcart.ph/products/585901682-vdiagtool-v200-pro-automotive-circuit-tester-power-circuit-probe-tester) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-04-22*