5211-JD331121
12V Relay Control Box
Mack

This relay control box is a vital component in managing electrical circuits within heavy-duty trucks. It allows for the switching of high-current loads with low-current control signals, enabling efficient operation of auxiliary systems such as lighting, horns, and other electronic accessories. Its robust design ensures reliable performance under vibration and temperature fluctuations typical of heavy-duty environments. Proper functioning of this relay control box is essential for the safe and efficient operation of your vehicle’s electrical systems. Source One Parts Center provides this reliable control unit to support the complex electrical needs of modern trucks, ensuring seamless integration and operation.