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This diagnostic probe tests voltage, polarity, continuity, short circuits, and relays in one tool, with red and green indicator lights for instant positive/negative detection. It works on 12V and 24V vehicles, and the digital display shows exact voltage.
It includes a built-in work light for dark areas, and comes with 4-pin and 5-pin relay sockets, battery clamps, output probe, and relay reset button. The voltage range is DC 3.5V–36V, suitable for cars, trucks, buses, and construction equipment.
Reviews imported from our previous store / verified customer feedback
Honestly, this circuit tester is super straightforward to use. My husband grabbed it for our older car and his work truck, both 12V and 24V systems. It just worked as expected, no fuss. Really helps with quick diagnostics.
This vehicle-ready tester is a solid little gadget for the price. It handles both 12V and 24V, which is crucial for my fleet. Found a faulty relay in minutes. Definitely a helpful tool to keep in the shop.
I used this tester to troubleshoot an annoying electrical issue on my RV. It helped me pinpoint the problem quickly, saving time. The display could be slightly brighter in direct sunlight, but it's reliable for general use.
