Best Circuit Testers with Probes of 2025

"I've been using this tool almost every day for work, and it's proved to be accurate and reliable. The one channel lab scope feature is a great addition that isn't available in other models. It’s a fantastic investment for the price!"

"Since I added this tool to my toolbox, it has become my primary tool for electrical diagnostics. I was skeptical about spending a lot on a volt meter with a switch, but I’m glad I chose this one. Just a note, the display can be tricky to read at certain angles!"

"As a motorcycle mechanic, I found this power probe to be extremely easy to use and the signal readings are very reliable. It’s a perfect fit for any mechanical work I’m doing and I would recommend it to anyone!"

"I've always believed in having the right tool that won't break the bank. The first time I used this tool, I diagnosed an issue in just 15 minutes that other shops couldn't solve. It saves me time and money, and the instant feedback is a huge plus!"

"I really appreciate the customer support I received. After contacting them, I learned that I needed to push the probe tip in firmly, and it worked perfectly. While I was initially worried about the weak fit, I'm glad the support team was responsive and helpful!"

"This product has been a great value for my needs, especially for troubleshooting electrical faults in agricultural equipment. I chose this over the more expensive options and it has met all my requirements with excellent performance. I'm very satisfied!"

"Let me tell you, there's nothing more American than guns, beer, and a square body. My 79 Dodge has a connector that doesn't just connect to one component, which makes diagnosing issues a bit tricky, especially with electronics."

"This tool is a beast. I'm really impressed and would highly recommend it to anyone."

"I used this tool to diagnose a blown fuse right when I received it. It quickly paid for itself. There are several helpful YouTube videos that show how to use it effectively."

"As a DIY mechanic, I found the VDIAGTOOL V200 Pro to be an incredible upgrade from my previous digital voltmeter. I never have to worry about dead batteries since it draws power from the vehicle. While it takes some getting used to, the included manual and online videos make the learning process smoother. I tested the circuit breaker finder and it worked perfectly, helping me track the wiring in my 2014 Jeep Grand Cherokee from the fuse box to the headlight."

"The VDIAGTOOL V200 Pro 2-in-1 kit is impressively versatile, combining a multimeter, test light, and power probe all in one. I appreciated the long cables, which allowed me to work away from the car battery easily. It also has A/C testing capabilities and a rudimentary oscilloscope function, making it suitable for a wide range of automotive diagnostics. The included case is great for storage and transport, and I’ve had a positive experience with their customer service."

"I've found the VDIAGTOOL V200 to be extremely helpful in troubleshooting various electrical problems on my son's car and even tracking down issues on my tractor. It has proven its worth, making my diagnostic tasks much easier."

"I often use this for my mobile business to help shops and customers diagnose electrical issues with their vehicles. It's fast and accurate on voltage readings, with an easy-to-read display. The long cable lets me check fuse boxes and wiring all the way to the trunk and engine bay easily. No adjustments needed—just plug, play, and go! I recommend it 100% for both DIYers and professionals!"

"This tester is so much easier to use for finding wiring issues than a voltmeter! Within just a couple of hours, I discovered four shorts and two broken wires that had grounded themselves out when they should have been positive. Overall, I'm really pleased with this tester—it's going to save me many headaches in the future."

"After buying a used truck that wouldn't start, I borrowed a name-brand probe from a friend. I'm really glad I did! You can use other tools for electrical troubleshooting, but few can power up components like a fuel pump for functional testing. I liked it so much that I added one to my automotive tools. This one is perfect; you can test anything with it! Plus, it comes with a 20' extension, making the reach 40'. It works on most 12-volt systems. I couldn't be happier—buy yourself one!"

"I recently purchased the VDIAGTOOL V200 Pro for my dash camera installation. It helped me identify which fuses had constant power and provided visual and auditory feedback. The 20-foot power cord and various connectors made my project easier. While the advanced features aren't detailed in the manual, the basic functions were intuitive. Overall, this tester exceeded my expectations and is perfect for DIY projects."

"After testing the VDIAGTOOL V200 PRO Upgrade Kit for over a week, I'm impressed with its performance. It offers a wide range of features similar to the Power Probe but at a fraction of the price. The 30PCS Back Probe Kit is a fantastic addition, enhancing its usability. This tool excels at various tests, and I highly recommend it for anyone in need of reliable automotive electrical testing."

"This diagnostic tool is fantastic for anything with a 12-24 volt operating system. The kit is high-quality, from the packaging to the accessories. I particularly liked the voltage drop test capability with the long power cord. While I think the wire piercing adapters could be improved, this kit performed flawlessly on several vehicles and saved me a lot of diagnostic time."

"I find it good to have and easy to use. Just be mindful when adding power. It works as it should and seems like it will last."

"I purchased this for my van to address an issue with the electrical system."

"Previously, I had a short lead test probe for checking fuses and connections in my cars. This new probe with its 15 ft lead cable is a huge improvement in convenience and versatility. The built-in flashlight is incredibly handy for those dark spots behind the dashboard. I can easily do measurements and diagnostics with one hand now. Overall, it's an affordable and essential tool for any DIY mechanic. I just wish it had a case for storage."

"I haven't used it extensively yet, but it works well for everything I've tried, including testing batteries and actuation tests. It's a really nice all-in-one setup!"

"After adding the ANCEL PB600 Circuit Tester to my toolkit, I've found it to be a game-changer for troubleshooting electrical issues. Its range of functions is impressive, allowing me to detect short circuits and test battery health. The 30ft cable is incredibly helpful for reaching difficult spots, and the LCD display makes it easy to read results. It's been a fantastic tool for both my car and motorcycle!"

"The PB600 Power Circuit Probe Tester by ANCEL has proven to be a great addition to my toolbox. The quality is noticeable, and the 30ft cable is convenient for accessing various parts of my vehicles and RV. The screen clarity and functionality are impressive, and the overall performance has met my needs. I plan to share a video review to provide a closer look at the product!"

"I used this tool to bypass the electrical system and diagnose a bad fuel pump. There was plenty of cord to reach the fuel tank in my long bed truck. I wish I had one of these sooner; it’s going to be very useful."

"Troubleshooting electrical issues has always been a challenge for me. I've seen videos of using power probes for circuit tests and was impressed, but they used to be pricey. With the market now flooded with clones at lower prices, it's the perfect time to add one of these to my toolkit! The ability to identify power and ground sources is invaluable—far easier than using a typical DMM. This unit feels well constructed, and the extra extension cord is a great bonus. Every DIY handyman should have one."

"I bought this for electrical troubleshooting, and it works great. It does exactly what it claims, allowing me to read voltage while testing and providing power to components as needed. The cord length is a solid feature, making it a smart purchase."