Relay, Fuel Injector: Operation
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Two separate relays control the fuel injectors. When the primary relay is on. The secondary relay is off. The PCM controls the ground to the relays and determines when to switch the relays from the gasoline to CNG. This allows for smooth fuel transfer and operation. The ASD relay supplies both unique relays with power.