The fuel pump relay on your 2012 Dodge Challenger should be located under the dashboard. You’ll have to remove the lower portion of the dashboard on the driver’s side of the Challenger to access it, but once you’re there, you should be able to reset your fuel pump with a flick of the inertia switch.
The fuel pump relay keeps fuel from entering your engine. You may need to access this part in order to perform regularly scheduled maintenance on your car’s fuel system.
For more information, consult your car’s owner’s manual.