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Check the inside surface of the fuse box lids, 98-03 models had the layout information molded into the plastic. I'm not sure if 04+'s are the same, but it would be silly of Dodge to not put the info there anymore...
In my 04D, the fuse block is under a cover near the park brake pedal, and there is a diagram on the inside. Unfortunately, the diagram shows only the fuse number, not the chain it protects.