1. Continuously powers the relay coil via the automobile battery to enable proper testing of relay contact function. 2. The tester allows observation of contact data, closure time, relay inertia, and other parameters at each test stage. 3. Tests and verifies proper control of relay opening and closing operations. 4. Features a red LED to indicate abnormal relay performance and a green LED for normal operation. 5. Well-built with reliable performance. 6. Simple to operate. 7. Compact and portable design. 8. Suitable for testing relays used in various automotive systems such as lights, wipers, air conditioning, electric seats, power doors, anti-lock braking systems, and audio systems. Automotive relays are subject to vibration, high and low temperatures, and humidity, which can reduce their lifespan. Relay failure can lead to system malfunctions or vehicle immobilization, making regular relay inspection essential. The tester checks relay contact functionality by connecting to a car battery (11V–15V). Color: Black & Red Material: Plastic Package Contents: 1 x Car Relay Tester Note: Only the items listed above are included. Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement may vary by ±1–3 cm.