ProPlus Plug Tester 13-pin 12 V 343543

With the 13-pin plug tester 343543 from ProPlus, you can check the lights of your vehicle and synchronise them with the ones of the trailer. First you can connect the tester to the vehicle's power socket. Then switch on the ignition and test all functions with the aid of a second person. If the socket is properly assigned, the corresponding indicator lights up. (When testing the direction indicator, the light will also blink.)