Digital Voltage Circuit Tester Pen for Car & Truck 6V–72V
Digital Voltage Circuit Tester Pen for Car & Truck 6V–72V
Digital Voltage Circuit Tester Pen – Works on Cars, Trucks & More
Tackle automotive electrical diagnostics with confidence using this professional-grade Digital Voltage Circuit Tester Pen. Designed for cars, trucks, and a wide range of vehicles, this compact test pen measures voltage up to 72V and displays readings instantly on a clear LED digital screen — no guesswork, no fumbling. Whether you're checking headlights, taillights, turn signals, fuse connections, or faulty sockets, this tool gives you fast, accurate results right at your fingertips.
Made in Mainland China.
Key Features
- LED Digital Display: Bi-directional voltage testing with polarity indication — red LED for positive, green LED for negative — so you always know what you're working with.
- Wide Voltage Range: Measures from 6V up to 72V, covering standard 6V, 12V, and 24V vehicle systems with ease.
- Premium Build Quality: ABS high-hardness insulation shell, chrome-plated alligator clips, ultra-tip test probe, and a thick spring test line for lasting durability.
- Easy to Use: Simply connect the alligator clip to either the positive or negative pole — the tester identifies polarity automatically. The long PU spring wire adds flexible reach for tight spaces.
- Compact & Lightweight: At just 190mm long and 78g, this pen is easy to store in a glove box or tool bag and ready whenever you need it.
- No Battery Required: Draws power directly from the circuit being tested — nothing extra to buy or charge.
Specifications
- Voltage Range: 6V – 72V
- Length: 190mm
- Weight: 78g
- Shell Material: ABS High-Hardness Insulation
- Battery: Not required
Ideal For
- Checking automotive headlights, taillights & turn signal circuits
- Testing fuse connections and faulty sockets
- Diagnosing vehicle electrical systems on cars, trucks, vans & more
- DIY mechanics and professional automotive technicians
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Learn more: FuelEconomy.gov driving efficiency guidance
Frequently Asked Questions
Q: What voltage range does this automotive circuit tester pen support?
A: This digital voltage circuit tester pen supports a wide range of 6V to 72V, making it suitable for standard 6V, 12V, and 24V vehicle electrical systems found in cars, trucks, vans, and more.
Q: Does this circuit tester pen require batteries to operate?
A: No — the tester draws power directly from the circuit being tested, so no batteries are required. Simply connect the alligator clip to a ground or power point and touch the probe to the circuit you want to test.
Q: How do I tell the polarity when using this tester?
A: The tester features a built-in LED polarity indicator: a red light signals a positive pole and a green light signals a negative pole. You can connect the alligator clip to either pole and the display will correctly identify polarity automatically.
Q: What types of vehicle circuits can I test with this pen?
A: This tester is designed for a broad range of automotive circuit checks, including headlights, taillights, turn signal circuits, fuse connections, and faulty sockets. It is ideal for both DIY car owners and professional mechanics.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.