Automotive Relay Tester 12V/24V 4/5 Pin Car diagnostic tool, Battery Voltage & Checker for Cars, SUVs, Trucks and Fleet Maintenance  (Red)

Instant Relay Status Check: Plug any standard 12V or 24V 4-pin or 5-pin relay into the matching socket of the tester. Integrated indicator lights instantly reveal the working state of the relay coil and verify proper closure of switch contacts. You can obtain intuitive pass/fail feedback within seconds without repeated trial relay swaps, streamlining your automotive troubleshooting workflow for quicker repair progress. Built-in Circuit Voltage Probe Function: Apart from dedicated relay diagnosis, this tester supports auxiliary circuit voltage checks. With the tester powered via vehicle battery clips, touch the probe against wire terminals or fuse slots. Corresponding indicator feedback helps you locate loose connections, unstable power delivery and open circuit faults conveniently, removing the need to switch between separate diagnostic gadgets.  Secure Battery Clips With Reverse Polarity Protection: Sturdy heavy-duty alligator clips allow direct connection to 12V / 24V automotive batteries. Colour-coded clips (red for positive terminal, black for negative terminal) effectively avoid reverse hookup that could harm the tester. The device only draws power during active testing sessions to reduce unnecessary battery drain, delivering safer and more hassle-free field diagnostics. Compact Handheld Build Suited for Engine Bay Work: The single-handhold casing adapts well to cramped engine bay working environments, and its properly sized connecting cables avoid tangling with movable engine components. Tough impact-resistant outer casing boosts drop resistance for typical garage mishaps such as falls onto concrete floors. Its portable footprint makes storage easy inside tool chests or car glove boxes without occupying excessive storage room. Versatile Socket Layout for Widely Used Relays: This diagnostic tester is pre-equipped with dedicated sockets fitting mainstream 4-pin and 5-pin automotive relays, with no extra adapters required. Spring contact terminals inside each slot hold relay pins tightly to deliver steady electrical contact during testing. It is compatible with most ordinary vehicle relays applied in headlight loops, radiator cooling fans, horn assemblies and fuel pump systems.