Male plug protector for trailer wiring harness

A vertically oriented, male plug protector for a trailer wiring harness connection plug having a female type receptacle with a spring-biased hinged cover at its lower end. The upper end is closed. The device has a back plate for mounting to a trailer near the hitch end. When the trailer is not in use, the cover is pulled back and the male wiring harness plug is inserted. The male plug end is retained in the protector by the spring action of the cover and a protrusion on the interior of the cover corresponding to a projection located on the male plug wall. To remove the plug, the user pulls back the cover and removes the plug. The electrical wiring harness plug is retained within the protector to prevent environment damage from occurring to the plug's electrical connectors when the trailer is not in use.