EASY TO USE: The tester will automatically detect the pin position, the release time of the action, and the consistency of the relay in each test phase. If the tester lights up the green LED light, the relay is normal; if the red LED light is on, the relay is abnormal. The relay puller makes it easy to remove the relays to be tested. USA Patented

FAST OPERATION: First, clip the alligator clip of the tester to the car battery, the black clip on the negative pole, and the red clip on the positive pole. When the red LED light is on, the tester is ready to start the test. Move the 4 Pin/5 Pin switch to match the number of pins on the relay. Select the appropriate socket according to the relay pins and configuration and insert the relay into the socket. Press the "Test" button, and the tester will automatically begin to operate the relay several times while checking all operations of the relay

VERSATILE FITMENT: Suitable for most general-purpose automotive relays on the market. When testing, it needs to be connected to the car's 11V-15V battery. The car battery must be a 12V battery, and the battery voltage must be between 11V-15V. The applicable coil resistance is preferably above 20 ohms. Not intended for use with all BMW relays

COMPACT DESIGN: Our automotive Relay tester is small and easy to carry around for on-the-go jobs or for easy storage. Its compact design allows easy use no matter where you are

SIMPLE AND EFFECTIVE: With our patented design this relay tester will give you the results you need quickly and easily. A red light means that the relay is bad, and a green light means the relay is good

COMPLETE TESTING KIT: Includes relay puller tool and battery clips with alligator connectors, providing everything needed to test automotive electrical relays efficiently and accurately

AUTOMATIC RELAY DETECTION: Features intelligent automatic detection system that identifies relay pin configuration and performs comprehensive testing of all relay operations with a single button press