12V Automotive Relay Tester Car Electronic Relay Circuit Tester Kit Diagnostic Tools Battery Checker Universal 4PIN 5PIN Fast Testing with LED Indicator Lights for Trucks Cars Electrical System

• Instant Relay Diagnostics – Quickly tests 4-pin and 5-pin automotive relays without removing them from vehicles. Relay tester automotive kit verifies coil functionality, contact points, and switching operation in seconds, saving valuable repair time.
• Intelligent LED Visual Indicators – Dual-color LED system provides immediate results: Relay tester 12-24v green light indicates properly functioning relays, Red light identifies faulty components requiring replacement.
• Universal Vehicle Compatibility – Car relay tester works with all 12V automotive systems including cars, trucks, motorcycles, and boats. Tests relays for fuel pumps, cooling fans, horn systems, and lighting circuits.
• Simple Plug-and-Play Operation – Automotive relay tester no technical expertise required. Simply connect to vehicle battery terminals and insert relay into tester socket. Automatic pin configuration detection eliminates setup complexity.
• Portable Design – Compact, lightweight construction with protective housing and integrated test leads. Ideal for professional mechanics and DIY enthusiasts working in garages or roadside situations.

This professional-grade 12V automotive relay tester provides mechanics and DIY enthusiasts with a rapid, reliable method for diagnosing electrical issues in vehicle relay systems. Designed to test both 4-pin and 5-pin relays commonly found in modern automobiles, this diagnostic tool eliminates guesswork by delivering immediate visual feedback through its intuitive LED indicator system. Instructions: 1. Connect the power cable to the car battery (black to negative, red to positive). 2. Ensure the red LED is on to confirm the tester is receiving power. 3. Select "4-pin" or "5-pin" depending on the relay type. 4. Plug the relay into the appropriate socket. 5. Press the "Test" button to begin the test. 6. The tester will analyze the relay and indicate the results via the LEDs: Red LED: Relay is faulty or incompatible. Green LED: Relay passed all tests. 7. After testing is complete, disconnect the tester from the battery and remove the relay. Key Features: Precise Testing: Continuously monitors relay contacts using the car battery to ensure proper function. Comprehensive Analysis: Observes relay closing time, contact data, and inertia at each test stage. Fault Indicator: A red LED indicates an abnormality, while a green LED indicates normal operation. User-Friendly Design: Simple operation and clear indications for 4- and 5-pin relays. Portable and Durable: Compact and lightweight design with reliable performance for long-term use.