Abstract: A headlight adjuster for adjusting the aim of a headlight. The adjuster provides relatively fine incremental control of headlight motion in response to relatively coarse adjustment of a drive shaft. This functionality is achieved by use of a link having two gear driven sections. A first helical section engages a drive gear which serves as the mechanical input. A second threaded section of relatively fine thread engages a nut fixed in the adjuster housing. The link is carried in a linear bearing which allows free rotation of the link in accordance with the mechanical input. The degree of translation, however, is controlled by the pitch of the thread engaging the nut.