Automotive Circuit Tester 6-24V | 13-Ft Lead Car Test Light

Power Circuit Probe Tester – Your Essential Automotive Diagnostic Tool

Take the guesswork out of vehicle electrical troubleshooting with this professional-grade 6-24V DC Automotive Circuit Tester. Whether you're diagnosing a faulty fuse, tracing a wiring short, or checking for power continuity in your car, SUV, or truck, this reliable test light gives you fast, accurate results every time. Built for both DIY enthusiasts and professional mechanics, it features a generous 13-foot lead wire for maximum reach across any vehicle.

Made in Mainland China.

Key Features

• Wide Voltage Range: Compatible with 6V to 24V DC systems — ideal for cars, SUVs, trucks, motorcycles, and marine applications.
• 13-Foot Lead Wire: Extra-long cable gives you the freedom to reach any part of your vehicle without moving your ground connection.
• Bright Indicator Light: Instantly signals the presence of power — no confusion, no second-guessing.
• Circuit Breaker Finder: Quickly identify tripped or blown circuit breakers in your vehicle's electrical panel.
• Continuity Testing: Verify that circuits are complete and functioning correctly before major repairs.
• Durable Probe Tip: Sharp, sturdy probe tip penetrates wire insulation and reaches tight connectors with ease.
• No Battery Required: Draws power directly from your vehicle — always ready to use.
• Ergonomic Handle: Comfortable grip for extended use in the garage or on the road.

Who Is This For?

This automotive test light is perfect for home mechanics, professional technicians, and automotive enthusiasts who need a fast, dependable tool for diagnosing electrical issues. Use it on any 6V–24V DC vehicle system, including standard 12V car batteries.

What Can You Test?

• Car, SUV, and truck wiring circuits
• Fuses and circuit breakers
• Relays, switches, and sensors
• Trailer hitch wiring
• Marine and RV electrical systems
• Motorcycle and ATV wiring

Specifications

• Voltage Range: 6–24V DC
• Lead Wire Length: 13 feet (approx. 4 meters)
• Battery Required: No
• Compatible Vehicles: Cars, SUVs, Trucks, Motorcycles, Marine

Related Tools You Might Need

For more automotive diagnostic and electrical tools, check out these related products from our store:

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• Automotive Cables & Jump Starters

Learn More About Automotive Electrical Systems

Want to better understand how your car's electrical system works? Visit the National Highway Traffic Safety Administration — or read about automotive electrical safety on NCBI's guide to electrical circuit fundamentals.

Frequently Asked Questions

Q: What vehicles is this automotive circuit tester compatible with?

A: This circuit tester works with any 6V to 24V DC electrical system, making it compatible with standard 12V cars, SUVs, trucks, motorcycles, RVs, boats, and ATVs. It's one of the most versatile automotive test lights available.

Q: Do I need a battery to use this circuit tester?

A: No battery is required. The automotive circuit probe tester draws power directly from your vehicle's electrical system, so it's always ready to use without any setup.

Q: How long is the lead wire on this circuit tester?

A: The lead wire is 13 feet (approximately 4 meters) long, giving you plenty of reach to clamp the ground lead to a stable point and probe circuits anywhere in your vehicle.

Q: Can I use this for continuity testing?

A: Yes! This tool is specifically designed for continuity testing of automotive circuits. The bright indicator light illuminates when a complete circuit is detected, making it easy to identify breaks, shorts, or open circuits in your vehicle's wiring.

Q: Can this tool find blown fuses and circuit breakers?

A: Absolutely. The circuit breaker finder function lets you quickly locate blown fuses and tripped breakers in your vehicle's fuse box, saving you time and frustration during diagnostics.