Automotive relay testers help you quickly identify faulty relays in 12V installations by checking the coil, contacts (30/87/87a) and operation under load. You can find wireless models and models with LED indicators, compatible with 4/5-pin mini ISO relays, ideal for diagnosing circuits for headlights, fans, fuel pumps and other high current consumers. Choose a reliable tester for automotive relays for precise checks, correct response time and saving time in the service or garage.