Features 6 LEDs, a testing circuit for the taillights, brake lights, reserve lights, left turn signal, right turn signal, and auxiliary power.
It works by plugging in the connector socket of your vehicle end and seeing the lights display.
Each of the indicator lights with clear labeling to tell you which of your towing vehicle lights work or don't. If the socket is getting proper power, the tester's various LEDs will light up.
When you're going to hitch a new trailer, you own peace of mind because you make sure the lights are connected properly