6V/12V/24V Automotive Voltage Tester Pen – Dual LED Circuit

Shunmaii 6V/12V/24V Automotive Voltage Tester Pen with Dual-Color LED Display

Take the guesswork out of car, truck, and motorcycle electrical diagnostics with the Shunmaii Voltage Tester Pen. Engineered for 6V, 12V, and 24V DC/AC systems, this compact probe pen delivers instant, clear circuit readings via a dual-color LED indicator — making it an essential tool for both professional mechanics and passionate DIYers.

Made in China.

Key Features

• Wide Voltage Compatibility: Works seamlessly across 6V, 12V, and 24V electrical systems — perfect for cars, motorcycles, trucks, and boats.
• Dual-Color LED Indicator: The intuitive three-in-one LED display gives you instant, accurate circuit status at a glance — no guesswork needed.
• Sharp Steel Probe: The precision-tip probe glides through wire insulation effortlessly, making circuit checks and fault-finding fast and simple.
• Easy Ground Testing: Simply clip the alligator clamp to any ground (metal body or negative terminal), touch the probe to the test point, and read the result instantly.
• All-Weather Reliability: The frost-resistant soft wire cable holds up in cold workshop conditions, ensuring dependable readings year-round.
• Lightweight & Portable: At just 48g and 156.9mm long, this tester slips easily into a toolbox, glove compartment, or pocket.
• No Batteries Required: Powers directly from the circuit under test — always ready when you need it.

Specifications

How to Use

1. Clamp the alligator clip to a ground wire, metal body panel, or the vehicle's negative terminal.
2. Touch the probe tip to the conductive point you want to test in the circuit.
3. LED lights up on the probe only → circuit is complete and working normally.
4. Bulb lights up (or no light) → circuit may be faulty; further inspection is recommended.

What's in the Box

• 1 × Shunmaii Car/Truck Voltage Circuit Tester Pen

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For more information on automotive electrical safety and best practices, visit the U.S. Consumer Product Safety Commission (CPSC).

Note: Due to monitor and lighting variations, the actual product color may differ slightly from images. Please allow ±1–2 cm measuring deviation due to manual measurement.

Frequently Asked Questions

Q: What voltage systems is this automotive voltage tester pen compatible with?

A: This voltage tester pen is compatible with 6V, 12V, and 24V DC and AC electrical systems. It is ideal for use on cars, motorcycles, trucks, and boats — covering the vast majority of standard automotive and small vehicle circuits.

Q: Do I need batteries to use this circuit tester pen?

A: No batteries are required. The tester draws power directly from the circuit being tested, so it is always ready for immediate use without any setup or charging.

Q: How do I read the dual-color LED indicator on this voltage tester?

A: When you clip the alligator clamp to a ground point and touch the probe to a live circuit, the dual-color LED illuminates to show the circuit status. If only the stylus/probe LED lights up, the measured point has a complete, functioning circuit. If the bulb lights up or there is no light response, the circuit may have a fault that needs further inspection.

Q: Can I use this voltage tester pen to check fuses and switches in my car?

A: Yes! The sharp steel probe tip is designed to make contact with fuse terminals, switch contacts, and wire insulation points, making it an excellent tool for diagnosing blown fuses, faulty switches, and broken wiring in automotive circuits.