An auxiliary trailer lighting system includes a base plate that has a back side attached to a trailer. A top wall is attached to the plate and extends outwardly away therefrom. A lip is attached to the top wall. A reflective wall is attached to the lip and extends toward a bottom edge of the base plate. A translucent covering is removably attached to the lip and extends from the lip and over the reflective wall so that a first compartment is defined between reflective wall and the covering. At least two light emitters are mounted in the first compartment. A control is electrically coupled to a turn signal system and a running light system of a truck. The control is electrically coupled to the light emitters. The control turns on the light emitters when both of the running light and turn signal systems are turned on.