The Carlson H9434 is a vintage part manufactured by Carlson in the United States. Known for producing high-quality auto parts, Carlson is a trusted brand in the automotive industry. This relay is specifically designed to be used in starters, alternators, and ECUs, making it a crucial component for maintaining the functionality of car and truck systems. Its vintage nature adds a unique touch to any vehicle, making it a sought-after accessory for automotive enthusiasts looking to restore or enhance their vehicles.