Automotive Circuit Tester & Voltage Test Pen – 6V to 24V DC

Find Electrical Faults Fast – No Multimeter Needed

This automotive circuit tester and voltage test pen is the go-to tool for diagnosing electrical issues in cars, utes, trailers, boats, and motorcycles. Simply clip the alligator lead to ground, touch the probe to any circuit point, and the built-in indicator light (or digital display, depending on variant) tells you instantly whether the circuit is live.

Ideal for checking fuses, switches, relays, wiring harnesses, and sensors — without needing a full multimeter setup.

Key Features

• Sharp steel probe tip — pierces wire insulation to test circuits without cutting or stripping
• Built-in indicator — light illuminates when circuit is live (digital display variant shows voltage reading)
• 20A alligator clip — heavy-duty ground connection for reliable testing
• Replaceable 3W bulb — easy to service in the field
• Wide voltage range — 6V to 24V DC, suitable for 12V and 24V vehicle systems
• Compact & lightweight — fits in a toolbox, glove box, or workshop apron

Variants Available

• Spring Wire — flexible spring-style lead for easy reach in tight spaces
• Big Black — heavy-duty probe with larger handle for grip
• Digital Display — shows live voltage reading on an LCD screen
• Small Green — compact lightweight option for everyday use

How to Use

1. Clip the alligator clip to a known ground point (e.g. vehicle chassis or battery negative)
2. Touch the probe tip to the circuit point you want to test
3. If the indicator lights up (or displays a voltage), the circuit is live and functioning
4. No light or reading indicates an open circuit or fault at that point

Specifications

• Voltage Range: 6V – 24V DC
• Clamp Capacity: 20A
• Bulb: 3W (replaceable)
• Pen Length: 17.3cm
• Probe Length: 8.3cm
• Lead Length: 96cm
• Weight: 118g
• Material: ABS plastic body, carbon steel probe

Compatible With

Cars, SUVs, utes, trailers, caravans, boats, motorcycles, and any 6V–24V DC electrical system.

Not suitable for AC mains voltage testing. For automotive low-voltage DC use only.