🔍 Find Any Fault in Seconds

The digital circuit test pen that tells you exactly what’s wrong — instantly, accurately, safely.

Chasing an electrical fault in your car, boat, or trailer — and getting nowhere? Blown fuses, dead circuits, faulty sockets — electrical problems are invisible until you have the right tool. Guessing wastes hours. A proper circuit tester finds the answer in seconds. ⚡

The Car Truck Circuit Test Pen combines a sharp carbon steel probe, a high-visibility LCD digital display, and a wide 3–70V test range into one compact, professional-grade tool. Whether you’re a mechanic or a weekend DIYer, this pen gives you the confidence to diagnose any low-voltage circuit fast. ✅

⚡ Key Features

📱 LCD Digital Display with Backlight
Crystal-clear digital readout shows voltage to 0.1V resolution with ±1–3V accuracy — readable in both daylight and darkness. No more squinting at a dim indicator bulb. Know the exact voltage at a glance, day or night.

🔌 Wide 3–70V Test Range
Covers virtually every low-voltage automotive application: headlights, taillights, fuses, sockets, switches, wiring harnesses, and more. Works on cars, trucks, trailers, boats, motorcycles — any DC system from 3V to 70V.

🛡️ Computer-Safe — Won’t Damage Sensitive Electronics
Draws far less current than traditional incandescent test lights, making it safe to use on modern vehicles with sensitive ECUs, sensors, and control modules. Test with confidence — no risk of blowing a module.

🔧 Sharp Carbon Steel Probe + Rubber Insulation Tip
The hardened, chrome-plated carbon steel probe effortlessly pierces wire insulation to reach the conductor inside — even in tight, hard-to-reach areas. The rubber tip insulation protector guards against accidental electric shock.

🐊 Extended Spring Wire & Oversized Alligator Clip
The spring wire version stretches from 60 to 180cm, giving you the reach to clip to ground and probe anywhere under the hood — hands-free. The oversized alligator clip (20A capacity) grips securely for easy one-handed operation.

🎯 How to Use

1. Connect the alligator clamp to a ground point on the vehicle
2. Touch the probe tip to the circuit or wire you want to test
3. Read the voltage on the LCD display — if the indicator lights up, the circuit is live

📋 Specifications

📦 Package Includes

1 × Circuit Tester Pen

⚠️ For DC low-voltage systems only. Always follow vehicle electrical safety guidelines when testing circuits.