1. Continuously powers the relay coil via the automobile battery to properly test relay contact function. 2. The tester allows observation of contact data, closure time, and relay response at each testing stage. 3. Enables accurate control of relay opening and closing during testing. 4. Features a red LED indicator for abnormal relay conditions 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 brakes, and o systems. Automotive relays are exposed to vibration, high and low temperatures, and humidity, which can reduce their lifespan. Relay failure can lead to system malfunctions or vehicle inoperability, making regular relay checks essential. This tester verifies proper relay contact operation by connecting the car battery (11V–15V) to the relay coil. Color: Black & Red Material: Plastic Package Contents: 1 x Car Relay Tester Note: Light reflection and display differences may cause slight variations between the product color in images and actual color. Measurement may vary by ±1–3 cm.