1. Connects to the vehicle’s battery (11V–15V) to energize the relay coil and verify relay contact operation. 2. Displays contact status, closure time, and relay response characteristics during testing. 3. Enables controlled evaluation of relay switching—both opening and closing functions. 4. Features LED indicators: red LED illuminates for abnormal operation; green LED indicates normal operation. 5. Precision construction with reliable performance. 6. Simple, intuitive operation. 7. Compact and portable design. 8. Robust construction for long-term use. Most automotive systems—including headlights, windshield wipers, starters, air conditioning, power seats, power windows, anti-lock braking systems, and audio systems—rely on relays. These components are exposed to vibration, extreme temperatures, and humidity, which may affect longevity. Relay failure can disrupt associated systems or render the vehicle inoperable. Regular relay testing helps ensure system reliability. This tester verifies relay contact functionality by applying power from the vehicle battery to the relay coil. Color: Black & Red Material: Plastic Package Contents: 1 × Car Relay Tester Note: Color appearance may vary slightly due to lighting and screen settings. Dimensions may vary by ±1–3 cm.