Description Universal Compatibility :This relay tester is compatible with all types of cars, making it a versatile tool for any car owner. Accurate Diagnosis:With its ability to test relays, this tool can help diagnose any iues with your car;s electrical system. Easy to Use :The simple design of this tool makes it easy to use, even for those who are not experienced in car repairs. CE Certified:This tool is certified by CE, ensuring that it meets high safety and quality standards. Introduction: CNBJ-707 is a quick go/no-go tester relays that provides with indication of the general health and functioning of the most common Automotive relays. Tester will check for proper functioning of the relay contacts by connecting the car battery (11V--15V) to the relay coil. Tester will watch the pin configuration,the time to contacts closure and opening, consistency of the relay during each test seion, Tester will light the GREEN LED if all paed during the test seion,if not light the RED LED. 1. Connect the power leads to the car battery --black alligator clip to negative terminal, red alligator clip to positive terminal. 2. Tester is powered up when the LED illuminates in RED. 3. Check the relay before plugging into the tester. If it;s a 4 pin relay,select4 pin on the tester.If it;s a 5 pin relay, select5 pinon the tester. 4. Plug in the relay into one of the three receptacles. 5. Pre the TEST button. 6. Tester will check the pin configuration of the unknown relay. Tester will light the RED LED if the unkonwn relay is not the same to the most of common automotive relaysor the pin of the unknown relay is destroyed. 7.Tester will open and close the relay 10 times for testing the time to contacts closure and opening if the pin configuration of the relay is right. Tester will light the RED LED immediately if the time is overtime. 8. Tester will check the consistency of the relay after testing the time to contacts closure and opening ten times. Tester will light the GREEN LED if the test paed, if not light the RED LED. 9. Disconnect power leads from the car battery and remove relay from the tester. Attention: 1. The car battery must be 12V battery, and the voltage of the battery is among 11V-15V. 2. Ideal for coil resistance above 20 ohms. Package Included: 1 x car mount Car Relay Tester