This combination position lamp and turn signal unit mounts on the exterior of the host tractor or combine to provide both marker lighting and directional indication from a single housing. It connects to the machine's electrical system and operates across the standard voltage range used in agricultural equipment. The lens assembly is sealed against moisture and vibration. A failed unit typically shows as an intermittent or non-functioning light on that side, which can lead to reduced visibility for other operators in the field or on the road. When replacing, ensure the connector matches the original harness and that the housing gasket is intact to prevent water ingress.