Car Relay Tester Universal 12V Electronic Automotive Relay Tester Car Battery Checker Features:Made of high qualified material, it is solid and durable.Keep you informed of the condition of your car relay.By continuous automobile battery(11V-15V) to the relay coil.Check the relay contact function properly.Watch the pin configuration, the time to contacts closure and opening, consistency of the relay.Descriptions:The coil resistance is preferably at least 20 ohms.Car battery must be 12V battery, the voltage must be between 11-15V.Compact design, lightweight and portable, easy to carry and use.It works accurately and effectively, perfect choice for you.Specifications:Material: plastic + metalCable length: 1mSize: 130*70*30mmColor: red & black Note: Car battery must be 12V battery, the voltage must be between 11-15V. The coil resistance is preferably at least 20 ohms.Please allow 0-1 cm errors due to manual measurement. How to use the tool? The Steps are as Follows1. 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. Package included:1 x 12V Relay Tester