You can easily test the 15-pin trailer socket with our user-friendly technology by simply plugging in the device and by switching the functions through. All LEDs must light up around the function of each contact of the 15-pin Electrical outlet confirm. The best part? Our device stores the results until it is removed. In a second test, the spiral cables can be connected via the 15-pin Sockets can be checked for function. And that's not all: Our test device also offers an innovative flasher error simulation. Simply press the brake and flash to make sure the faults in the vehicle are displayed immediately. This feature allows you to quickly identify and resolve potential problems.This text is machine translated.