Abstract: A slider switch mechanism especially adapted for use on the steering column of an automotive vehicle for use as a speed control mechanism. The switch mechanism uses a slider constrained to translatory motion within guides of an enclosing housing. The slider is first assembled to a support member and the resulting assembly is fitted into and locked to the enclosing housing. The slider bears a compression spring which is held between axially spaced posts of a support member. The support member is fitted into an opening in one end of the housing and is advanced until a resilient locking member snaps into a cutout in the adjacent wall of the housing. When the support member is fully advanced into the housing, mating holders of the support member and housing are joined to lock the slider assembly into the housing. The slider may then be translated as necessary within the housing cavity, as desired.