The TopDiag P50 is a multi-functional automotive electrical tester designed to identify circuit faults quickly and accurately across a wide range of vehicles. This compact, handheld "power probe" style pen features a high-visibility LED digital display and integrated indicator lights to identify polarity, measure real-time voltage, and diagnose complex electrical issues that standard test lights might miss.

Comprehensive Brand & Vehicle Coverage

The TopDiag P50 is a Universal Diagnostic Tool compatible with any vehicle or equipment operating within a 5V to 30V DC range. It is ideal for:

• Passenger Vehicles: All major automotive brands (Toyota, Nissan, BMW, Mercedes, Ford, etc.) for 12V system testing.

• Heavy Duty & Commercial: 24V Trucks, Buses, and Industrial vehicles.

• Powersports: Motorcycles, ATVs, and Scooters.

• Marine & Outdoor: Boats, Trailers, and 12V/24V battery systems.

Task Performance Form

The P50 replaces multiple tools by performing the following essential diagnostic tasks:

How to Use (Short Form)

1. Setup: Connect the large alligator clip to a known good ground (negative) on the vehicle's battery or chassis.

2. Mode Select: Press the physical button on the pen body to cycle through the 3 Modes:

   • Mode 1: Both the digital display and the 5W bulb work together for full load testing.

   • Mode 2: Digital display only (bulb off) for testing sensitive computer circuits.

   • Mode 3: Bulb only (display off) for traditional quick fault checks.

3. Test: Touch the sharp stainless steel probe to the wire or terminal. Read the voltage on the screen and observe the LED colors.

4. Identify: A Red LED signifies positive power; a Green LED indicates a proper ground path.