What is the TopDiag P100?

The TopDiag P100 is a professional-grade automotive digital circuit tester designed to test and diagnose 12V and 24V electrical systems in cars, trucks, motorcycles, and other vehicles. It is a powerful multi-functional tool that combines the features of a voltage tester, power probe, continuity tester, and circuit analyzer—all in one compact and durable unit.

Whether you're a professional auto technician or a DIY enthusiast, the TopDiag P100 helps you quickly locate open circuits, short circuits, bad grounds, and measure voltage or polarity with ease.

Key Functions & Features:

Wide Voltage Compatibility:

• Supports both 12V and 24V systems, making it ideal for passenger cars, heavy-duty trucks, motorcycles, boats, RVs, and more.

Multifunction Circuit Testing:

• Voltage Detection (AC/DC): Measures voltage instantly with real-time digital display.

• Polarity Testing: Instantly identifies positive or negative polarity.

• Power Injection & Grounding: Allows you to energize components like relays, solenoids, lights, and fans for quick diagnostics.

• Continuity Testing: Easily check if a wire or component has a complete circuit.

• Short Circuit Detection: Helps track down shorts and faulty wires accurately.

• Overload Protection: Built-in circuit protection to safeguard both the tester and the vehicle's electronics.

Convenient Design:

• Comes with a 2-meter (6.5 ft) long test lead—giving you flexibility to move around the vehicle.

• Digital LCD display for clear voltage readings.

• Heavy-duty probe tip for precise contact in tight engine compartments.

Durable & User-Friendly:

• Rugged construction built to withstand workshop environments.

• Simple, one-hand operation with easy-to-use function buttons.

• Audible and visual indicators for instant feedback during tests.

Ideal For:

• Automotive electricians and mechanics

• Workshop diagnostic operations

• Vehicle troubleshooting and repair

• Electrical installations and modifications

• DIY car enthusiasts

Package Includes:

• 1 × TopDiag P100 Circuit Tester

• 1 × 2M Test Lead Cable

• 1 × User Manual

• 1 × Sturdy Carrying Case (optional, if applicable)

This tool enhances efficiency, reduces diagnostic time, and helps avoid guesswork when working with automotive electrical systems.