3-in-1 Automotive Circuit Probe & Relay Tester

3-in-1 Automotive Circuit Probe & Relay Tester

 (7356 Reviews)

check_circle Real-Time Voltage

check_circle Instant Polarity

check_circle Relay Testing

check_circle Component Activation

$39.98
$39.98 $79.99
SAVE 50% Sold out
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3-in-1 Automotive Circuit Probe & Relay Tester

3-in-1 Automotive Circuit Probe & Relay Tester

$39.98
$39.98 $79.99
SAVE 50% Sold out
View full details

⚡ 3-in-1 Power Circuit Probe Tester

Stop wasting hours searching for hidden vehicle faults.

This professional tool combines a Digital Power Probe, Relay Tester, and Component Activator into one powerful diagnostic system — helping you test circuits, locate problems, and repair with confidence.

    🚗 Is This Your Garage Nightmare?

    🔧 Hours Lost Chasing Electrical Problems You Can’t Find?

    Your vehicle won’t start.
    A relay stops working.
    A light, fan, or motor suddenly fails.

    You check wires.
    You replace parts.
    You spend money.

    But the real problem is still hidden.

    Stop guessing. Find the fault faster with the right diagnostic tool.

    🔥 One Tool. Complete Electrical Diagnosis.

    📟 3-36V Digital Voltage Testing

    Get accurate real-time voltage readings with the built-in LCD display.

    🔴🟢 Smart Polarity Detection

    Identify positive and negative circuits instantly with dual-color LED indicators.

    ⚡ Component Activation Testing

    Test motors, fans, lights, and electrical components before replacing them.

    🛡️ Built-In Safety Protection

    Automatic overload protection helps protect sensitive vehicle electronics.

    🚙 Built For Real Automotive Work

    Compatible with most 12V-24V DC vehicles, including cars, trucks, SUVs, motorcycles, boats, and RVs.

    Durable oil-resistant housing and professional design built for everyday garage use.

    One Diagnostic Tool for 12V and 24V Systems

    Designed for compatible DC electrical systems across personal, recreational and commercial vehicles.

    Cars & SUVs

    Pickup Trucks

    Vans

    Motorcycles

    RVs & Campers

    Construction Vehicles

    Fleet Maintenance

    Cars & SUVs

    Pickup Trucks

    Vans

    Motorcycles

    RVs & Campers

    Construction Vehicles

    Fleet Maintenance

    Cars & SUVs

    Pickup Trucks

    Vans

    Motorcycles

    RVs & Campers

    Construction Vehicles

    Fleet Maintenance

    Cars & SUVs

    Pickup Trucks

    Vans

    Motorcycles

    RVs & Campers

    Construction Vehicles

    Fleet Maintenance

    Connect. Probe. Diagnose.

    • 1.Connect to the Battery

      Attach the red and black clamps to a compatible 12V or 24V DC vehicle battery.

    • 2.Touch the Test Point

      Probe the wire, terminal, fuse, connector or compatible component you need to test.

    • 3.Read and Diagnose

      Use the LCD, polarity indicators, continuity response and test controls to locate the issue.

      Why choose us?

      Fewer Tools. Faster Answers. Better Repairs.

        Others
      Built-in overload protection
      Real-time DC voltage readings on a backlit LCD
      Automatic positive and negative polarity indication
      Continuity and circuit condition testing
      Dual LED illumination around the probe tip

      Testimonials

      • Brilliant piece of kit for the garage. Used it yesterday to trace a parasitic drain and activate a faulty window regulator without taking the whole door card apart. The 20ft cable easily reaches the back of a Transit van.

        Gareth Evans

      • A massive upgrade from my old test light. Being able to inject power directly into a circuit to test cooling fans saves me hours of messing about with jumper wires. Well worth the money for any serious auto sparky.

        Mark Tomlinson,

      • I work on a mixed fleet of 12V cars and 24V lorries. This 12V 24V circuit tester handles both perfectly. Found a massive short in a trailer lighting harness in about 5 minutes yesterday. Essential tool.

        Steve Patel

        Frequently Asked Questions

        What You Need to Know

        Yes. It is designed for compatible 12V and 24V DC vehicle electrical systems.

        It includes an integrated testing area for selected common 4-pin and 5-pin automotive relays. Always verify the relay layout before testing.

        It can apply positive or negative battery current to compatible DC components for diagnostic purposes. Confirm the component rating first.

        It replaces several common automotive diagnostic tools, but it is not intended to replace every function of a full multimeter, oscilloscope or manufacturer-specific scan tool.

        No. This tester is intended for compatible automotive DC circuits only. Never use it on AC household wiring.

        It is useful for mechanics, automotive electricians, repair shops, mobile technicians, fleet maintenance teams and experienced DIY users.