6V-24V Automotive Circuit Tester Probe Pen | Copper Fuse Light Pencil for Cars

Key Features

• Copper Tip — The tip is copper, which gives reliable conductivity for accurate testing.
• Cool-Running Light — The long-life light tube stays cool in use.
• Flexible Wire — The flexible wire has strong tensile strength and resists wear during frequent use.
• Voltage Range — It works with 6V, 12V and 24V systems.
• Attached Clip — The attached clip lets you carry the pen or attach it while you work.

Product Specifications

• Color: Silver
• Material: Copper
• Voltage Range: 6V-24V
• Quantity: 1 test pen

What It Is / How It Works

Circuit tester probe pens are hand-held test lights that show whether a vehicle circuit has voltage. They are used to check fuses and locate live wiring during automotive repair.

This automotive circuit tester probe pen checks electrical circuits, tests fuses, and finds voltage in a car.

Who It's For / Use Cases

It suits car owners who want to run basic electrical checks at home, DIY mechanics who need a simple voltage tester for repairs, and auto electricians who want a backup pen for quick diagnostics.

How to Use / Care

1. Use the pen on DC circuits in vehicles with a 6V to 24V electrical system.
2. Touch the copper tip to the point you are checking. The light comes on when the probe touches a live positive circuit.
3. Clip the pen to carry it or to keep it within reach while you work.
4. Keep the pen in your glove box or tool kit so it is ready for emergencies.
5. Do not use the pen on household AC power.

How to Choose

Start by matching the voltage range to the vehicle you work on, since this pen covers 6V, 12V and 24V systems. Check the system voltage before you test, and use the pen only on DC vehicle circuits. If you work on both cars and motorcycles, the same range applies to any vehicle with a 6V to 24V system.

Frequently Asked Questions

Can I use this tester on a motorcycle?
Yes, it works on any vehicle with a 6V to 24V electrical system, including motorcycles.

Does the light come on for positive circuits?
It is designed to test for voltage. The light comes on when the probe touches a live positive circuit.

Is the probe tip replaceable?
The probe tip is fixed and cannot be replaced. It is made of copper.

Can I use this to check household AC voltage?
No. The pen is designed for DC circuits in vehicles only, from 6V to 24V. Do not use it on household AC power.

Which voltage systems does it cover?
It works with 6V, 12V and 24V systems, so check that your vehicle falls within that range before you test.