If the engine cranks but does not start, or starts and stalls, the fuses should be inspected, especially the power door locks fuse. The power door lock fuse provides power to a module that sends the Powertrain Control Module (PCM) the "OK to start" signal.
Car Problem Reports
Dodge Ram 1500 Inspect Fuses if Engine Cranks But Does Not Start
Dodge Ram 1500 Problem