- Automotive Test Light, 3-48V DC Digital LED Voltmeter Circuit Tester Pen | Heavy duty 3-48V circuit tester with dual polarity indicator, stainless steel probe & anti-lost protection for car truck RV

This 12V automotive test light is an absolute essential if you do any kind of work on vehicles. Whether you’re a professional mechanic or just like tackling your own DIY repairs, this tool makes diagnosing electrical issues quick and straightforward. Right out of the box, I could tell it was built with durability in mind. The probe is solid and sharp enough to make clean contact, and the cord is flexible but sturdy, with enough length to reach around most areas of a car. The alligator clip is strong and grips securely, so I never have to worry about it slipping off while I’m working. The light itself is bright and clear, making it very easy to see even in daylight or dim garage settings. It gives instant feedback, which really speeds up the troubleshooting process compared to fumbling with multimeters when all you need is a quick check for power or ground. I’ve already used it to test fuses, trace wires, and check connections, and it hasn’t let me down once. One of the things I appreciate most is how simple it is to use. There’s no learning curve here — just clip it, probe it, and the light tells you what you need to know. It’s fast, accurate, and reliable, which is exactly what I need when I’m trying to pinpoint an electrical issue without wasting time. The compact size also makes it easy to store in a toolbox, glove compartment, or even in the door pocket of a vehicle. For the price, it’s one of the best investments you can make if you ever plan on working with automotive wiring, fuses, or electrical systems. Overall, this test light is affordable, durable, and works flawlessly. It’s a simple tool, but it does its job perfectly, and sometimes that’s exactly what you need. Highly recommended for anyone who wants a dependable way to quickly diagnose 12V systems — you’ll be glad you have it on hand when you need it!

Works quite well and displays voltage. Not bad at all for the bargain price!

Works great using it to test my landscape lighting

If you need to test fuses or if wiring has got power going through it? This works great. It’s a little finicky, but once you figure out what angle it likes to connect at, it works just fine. The big issue is the cable, while actually about 8 feet, feels like 2-3 when you factor in that it’s coiled. I really struggled getting it to a ground in the engine bay around hoses and pipes. Overall it’s solid. But if you need 7+ feet in cable length? Look into getting a longer one or one with a flat cable. Hard to beat for the price of what it is though. It’s easy to get an output, the display does what it’s supposed to, and aside from the tip being a little stabby, it’s small enough to fit in a tool box easily.

Really like this tool. The readout is very useful in situations where needed. Works properly.

This is a great on the spot tool for quick testing in many places under the hood been using it on 2 cars.

Does exactly what it says it does, for a great price. Is it a high-quality name brand lifetime tool? Of course not, for this price. Did I expect it to be? Also, of course not, for this price. What is IS is functional, easy to use, and affordable. 5 stars for value.

Works great with the digital reading

Great little device, works perfectly.

Works really well actually. Would be nice if the cord was longer, but I knew the length before I bought it. It’s sufficient for most things.

Le fils est trop court et le tester est un peu de base game mais fonctionne très bien tout dépendant de ce que chaque personne fait comme ouvrage

Useful tool but is one side to read only not like a test light...but perfect for the instant battery test

This is an awesome product, started using asap on my classic cars - huge time saver