2013 Dodge Ram Factory Repair Manual
Resources: My local dealership service department (dealership only). I am kinda surprised they sell a CD version. The entire reason for moving stuff online like that is so that the companies retain the digital rights to it and more control.
Same reason Movie industry wants you to buy movies in the cloud instead of a real physical copy. When I use to work on my Range Rover the dealer would get really upset that I knew part numbers (someone posted a hacked version of the parts catalog online). They guard that stuff as a source of revenue because if you don't know the part number you cant order parts from someone else.
Dodge Ram Factory Radio
There are factory service manuals available to the public, but your going to pay for them. How much your going to pay is going to depend on what you want out of the product/service for how long. If you have a single issue and need to look now, you can use the 3day/$30 subscription to save the money and have instant access to look at the full.