Universal Elektronischer Kfz Relais Tester für Auto Autobatterie Check 12V UK
Check the relay before plugging into the tester. If it's a 4 pin relay,select"4 pin" on the tester.If it's a 5 pin relay, select"5 pin"on the tester. Tester will light the GREEN LED if the test passed, if not light the RED LED.