The people on forums are an insightful bunch—you can save several hundred dollars by checking the fuse before repairing the fuel pump itself. The 2012 Dodge RAM 1500 fuel pump relay location is in the M25 slot of the fuse box located in the front-right of the engine compartment.
To get to it, pop the hood. Then, look for the fuse box near the front-right of the engine compartment. Open the box, use the diagram in your owner’s manual, and you should be able to find it and replace the fuse with ease.
If you’re curious about the part you need, the fuel pump relay for a 2012 Dodge RAM 1500 is a 20-amp, 4-terminal multipurpose relay. You can always ask the clerk at the desk of the auto parts store to look it up for you, or just bring the part in to get a replacement.