Abstract: A headlamp adjuster mechanism for use with a headlamp for controlling movement thereof comprises a housing. Gear means is disposed within the housing. The gear means comprises an adjusting member connected to the gear means for movement in response to rotation of the gear means, and is operatively connected to the headlamp for attaining controlled positioning thereof. Elastomeric braking means is disposed in engagement with at least one of the gear means and the adjusting member for providing prevailing torque for the mechanism to prevent inadvertent movement of the components of the gear means. The braking means is engaged at the outer periphery of the gear means to increase the moment arm associated with the force applied by the braking means such that a desired degree of prevailing torque can be attained. Further, the manner and component designs for attaining prevailing torque are such that the desired degree of said torque can be attained in each adjuster mechanism.