A wire harness assembly comprising: a housing defining an interior volume which extends into said housing along an axis, said interior volume having an interior surface having an interior perimeter, said housing also defining an outer surface having a retention protuberance extending outward therefrom; a seal received within said interior volume which engages said interior perimeter of said interior surface, said seal having a wire aperture extending therethrough; a wire extending through said wire aperture of said seal such that said wire aperture circumferentially engages said wire; and a seal retainer having a seal retainer wall which traverses said axis and which retains said seal within said interior volume, said seal retainer also having a seal retainer skirt which is defined by a plurality of skirt segments which extend from said seal retainer wall such that each of said plurality of skirt segments is positioned laterally to said outer surface; wherein one of said plurality of skirt segments defines a lock arm having a lock aperture which captures said retention protuberance therein, thereby retaining said seal retainer to said housing and limiting motion of said seal retainer relative to said housing along said axis, said lock arm being resilient and compliant which allows said lock arm to flex away from said axis, thereby allowing said lock arm to lift over said retention protuberance when said seal retainer is being installed on said housing and when said seal retainer is being removed from said housing, characterized in that said seal retainer has a flex limiting strap joining said lock arm to an adjacent one of said plurality of skirt segments which limits the extent to which said lock arm flexes away from said axis, wherein said flex limiting strap is a pleat which expands when said lock arm flexes away from said axis and which contracts when said lock arm returns toward said axis. a housing defining an interior volume which extends into said housing along an axis, said interior volume having an interior surface having an interior perimeter, said housing also defining an outer surface having a retention protuberance extending outward therefrom; a seal received within said interior volume which engages said interior perimeter of said interior surface, said seal having a wire aperture extending therethrough; a wire extending through said wire aperture of said seal such that said wire aperture circumferentially engages said wire; and a seal retainer having a seal retainer wall which traverses said axis and which retains said seal within said interior volume, said seal retainer also having a seal retainer skirt which is defined by a plurality of skirt segments which extend from said seal retainer wall such that each of said plurality of skirt segments is positioned laterally to said outer surface; wherein one of said plurality of skirt segments defines a lock arm having a lock aperture which captures said retention protuberance therein, thereby retaining said seal retainer to said housing and limiting motion of said seal retainer relative to said housing along said axis, said lock arm being resilient and compliant which allows said lock arm to flex away from said axis, thereby allowing said lock arm to lift over said retention protuberance when said seal retainer is being installed on said housing and when said seal retainer is being removed from said housing, characterized in that said seal retainer has a flex limiting strap joining said lock arm to an adjacent one of said plurality of skirt segments which limits the extent to which said lock arm flexes away from said axis, wherein said flex limiting strap is a pleat which expands when said lock arm flexes away from said axis and which contracts when said lock arm returns toward said axis.