Auto Circuit Tester Probe Pen 6V–24V | Car Voltage Test Tool
Auto Circuit Tester Probe Pen 6V–24V | Car Voltage Test Tool
Auto Circuit Tester Probe Pen – 6V to 24V Voltage Diagnostic Tool
Quickly identify electrical faults in your vehicle with this versatile automotive circuit tester probe pen. Compatible with cars, trucks, motorcycles, boats, and trailers, this compact test pen handles voltage ranges from 6V to 24V — making it ideal for a wide variety of low-voltage automotive and marine electrical systems.
Key Features
- Sharp steel probe tip — easily pierces wire insulation to access live circuits without the need to strip wires
- Built-in 3-watt replaceable bulb — lights up instantly when a live circuit is detected, giving you a clear pass/fail result
- Alligator clip ground lead — 96 cm (37.8 in) cord provides reach and flexibility; 20A clamping capacity
- Wide compatibility — test fuses, switches, wiring harnesses, and connectors in cars, trucks, trailers, motorcycles, RVs, and boats
- Durable ABS + metal construction — lightweight yet robust enough for regular workshop or roadside use
- Compact size — 17.3 cm (6.8 in) pen with 8.3 cm (3.3 in) probe fits easily in a glove box or tool bag
How to Use
- Clip the alligator clip to a known ground point (e.g., the vehicle's negative terminal or bare metal chassis).
- Touch the probe needle to the circuit point you want to test.
- If the bulb lights up, the circuit is live and functioning correctly. No light indicates an open circuit or fault at that point.
Specifications
| Material | ABS + Metal |
| Voltage Test Range | 6V – 24V (±1.5V tolerance) |
| Clamping Capacity | 20A |
| Bulb | 3-Watt (replaceable) |
| Pen Length | 17.3 cm / 6.8 in |
| Probe Length | 8.3 cm / 3.3 in |
| Cord Length | 96 cm / 37.8 in |
| Packing Weight | 140 g |
| Country of Origin | Made in China |
Please note: Due to a chip update, the working range is 6V–24V; however, the label printed on the pen body reads 6V–12V. The actual operating range is 6V–24V. A tolerance of ±1.5V applies.
What's in the Box
- 1 × Circuit Tester Probe Pen (batteries not included / not required)
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Frequently Asked Questions
Q: What vehicles is this automotive circuit tester probe pen compatible with?
A: This circuit tester probe pen is designed for any 6V–24V low-voltage system, including cars, trucks, motorcycles, RVs, trailers, and boats. As long as the system operates within the 6V–24V range, the tester will work effectively.
Q: Does the 6V–24V circuit tester require batteries to operate?
A: No, batteries are not required. The tester draws power directly from the circuit being tested — simply clip the alligator clip to a ground point and touch the probe to the test point. The 3-watt bulb illuminates when a live circuit is detected.
Q: Can the bulb in this voltage test pen be replaced?
A: Yes. The 3-watt bulb is fully replaceable, making this probe pen a long-lasting addition to your automotive diagnostic toolkit.
Q: Why does the body of the pen say 6V–12V but the listing says 6V–24V?
A: Due to a chip update, the actual working range has been extended to 6V–24V. The printed label on the pen body (6V–12V) has not yet been updated to reflect this change. Rest assured the pen operates correctly up to 24V.