Fuse box lids typically contain fuse box diagrams, as do owner's manuals. Owner's manuals for many model years of Ram trucks are available to download for free from RamTrucks.com.
Repair manuals for Ram trucks from third-party publishers, such as Hanes or Chilton, also have fuse box diagrams and fuse troubleshooting information. Most newer model vehicles have two fuse boxes with diagrams. Generally, there is a fuse box under the hood that controls the larger electrical systems and another in the glove compartment, under the dashboard.
When replacing fuses, it's essential to use a replacement with the correct amperage. A fuse with a higher amperage can cause damage, while one with a lower amperage may not work correctly.