ProPlus plug tester 7-pin 12 V + 2 adapters 343524

This plug tester can be used to test the vehicle's lights and synchronize them with the trailer's lights. First, connect the tester to the car's power outlet. Then turn on the ignition and test all functions with the help of a second person. If the connector is properly aligned, the corresponding indicator will light up (when testing the turn signal, the light will also flash).