






🔧 Diagnose like a pro—never miss a spark with WINAMOO’s precision test light!
The WINAMOO Automotive Test Light is a professional-grade circuit tester featuring a bright LED digital display with 0.1V resolution, dual-color polarity indicators, and a sharp stainless steel probe. Designed for 3-48V automotive systems, it includes a 96-inch spring wire and large alligator clip for flexible, single-handed operation. Its ergonomic, shatter-proof ABS body ensures durability and safety, making it an essential tool for quick, reliable diagnostics on cars, trucks, SUVs, and boats.






| ASIN | B0D8PXNPYH |
| Best Sellers Rank | #771 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Circuit Testers |
| Brand | WINAMOO |
| Brand Name | WINAMOO |
| Color | black |
| Customer Reviews | 4.7 out of 5 stars 2,172 Reviews |
| Included Components | Automotive Test Light |
| Item Dimensions | 11.1 x 4.2 x 1.4 inches |
| Item Weight | 200 Grams |
| Item dimensions L x W x H | 11.1 x 4.2 x 1.4 inches |
| Manufacturer | WINAMOO |
| Maximum Operating Voltage | 48 Volts |
| Measurement Type | Voltmeter |
| Min. Operating Voltage | 3 Volts |
| Minimum Operating Voltage | 3 Volts |
| Power Source | Corded Electric |
| Specification Met | CE, UL |
| UPC | 633337513730 |
S**.
Great Tool!
A very simple tool that picks up on voltage quite easily. The length of the wire is well sized for most cases. My only complaint is that the rubber warp on the handles of the ground prong managed to work their way off rather quickly, but that didn't affect the functionality of the tool. Definitely worth the price point and has helped me diagnose many automotive electrical problems.
L**4
High quality, cheap cost. Get this one. Worth it!
This circuit tester works great and is really easy to use. The lights clearly show positive and negative polarity, which makes checking things quick and simple. I’ve used it to test wiring and battery voltage on my vehicles and it’s been very handy. The long spring wire and big alligator clip make it easy to reach around the engine bay, and the sharp probe helps get into tight spots. Solid little tool to have around if you work on your own vehicles.
B**.
Lot of good uses for a good price.
Great basic tester just to check for voltage, works great to tell you the voltage of a battery (even 9V batteries) , will read out voltage of a car battery standing or running, helps determian if battery or the alternator is not good .
M**N
For the price….
Works great, but when you’re used to the bulb to light up or the beep, it’s kinda hard holding the tester with the display facing you when you’re at odd angles, I like it, the cable feels cheapie but for the price, it’s cool but you’re probably better off paying a few more bucks and get one with thicker gauge wire and one with the display/light/beep of your preference
S**Y
Great voltage tester
Not only check continuity but also determine the automotive line voltage. East to read, simple, and neat
G**!
Nice tool, does exactly what its supposed to do...
Hook it up to ground and find voltage, it works fine. Good value in this tool!
B**A
Great for diagnosing
Works very good, no problems seems to be well-made and easy to use
A**R
A rare bargain on a great tool
I worked for Cummins Ct for 45 years I wish I had one then. A test light only shows if power is present. This shows if power is present and how much, it is a great bargain saves hooking up multi meter. I have told others don’t wait buy one
Trustpilot
5 days ago
2 weeks ago