What does the radio noise suppression relay do?

The radio noise suppression relay is a device used to reduce the amount of electrical noise generated by a vehicle's electrical system. This noise can interfere with the operation of radios and other electronic devices, causing static or other unwanted sounds. The relay works by diverting the electrical current that would normally flow through the vehicle's speakers to a capacitor, which stores the energy and releases it slowly. This helps to smooth out the electrical current and reduce the amount of noise generated. The relay is typically located in the engine compartment and is activated when the vehicle's ignition is turned on.