you should have error code 651-5 for number 1 injector and then it changes to cummins code 322 I will see if I can put up a wiring diagram from the trouble shooting

Component Description
The injector solenoid valves control fueling quantity and injection timing. The electronic control module (ECM) energizes the solenoid by closing a high-side and a low-side switch. There are two high-side switches and six low-side switches inside the ECM. The injectors for cylinders 1, 2, and 3 (front bank) share a single high-side switch that connects the injector circuit to the source of high voltage inside the ECM. Likewise, the injectors for cylinders 4, 5, and 6 (rear bank) also share a single high-side switch. Each injector circuit has a dedicated low-side switch that completes the circuit path to ground inside the ECM.
Component Location
The engine harness connects the ECM to three injector circuit pass-through connectors that are located in the rocker housing. Internal injector harnesses are located under the valve cover and connect the injectors to the engine harness at the pass-through connectors. Each pass-through connector provides power and return to two injectors.
Conditions For Running The Diagnostics
This diagnostic runs continuously when the engine is running.
Conditions For Setting The Fault Codes
The ECM senses current as each injector is actuated. If the ECM detects a persistent circuit error on an injector circuit, this fault will become active. If a circuit error is determined to cause excessive current, the ECM will disable the injection event for the cylinder(s) that is faulty.