The Primatech 12V with 4-Terminal Blower A/C Resistor is the perfect solution for Peterbilt truck applications. This resistor helps prevent overheating and other electrical issues that can lead to premature failure of the fan motor. It comes with plug and play connectors that can be easily installed. It is designed to provide reliable performance and long-lasting durability. FleetPride is your First Click in Heavy Duty®.