Your confusion is understandable. You’re not finding what you’re looking for because the 2006 Dodge Ram’s fuel pump relay is located in the main fuse panel under the hood. You can check the diagram on the panel cover to see where it’s located in the junction box.
A faulty fuel pump relay can often cause your engine to stall and could even lead to a complete breakdown, so it’s a good thing you know what to do to fix it. However, if changing the fuse doesn’t solve your problem you may want to head to a garage to get an expert’s help. It may take some time and cost a bit more money, but an expert can make sure all your truck’s systems are working properly.