Where is the fuse for the ignition on a 2003 Lincoln Navigator?

The fuse for the ignition on a 2003 Lincoln Navigator is located in the interior fuse box, which is typically found under the dashboard on the driver's side. You can check the owner's manual for the exact fuse number, but it is usually labeled as "IGN" or "Ignition." Make sure to inspect the fuse for any signs of damage, and replace it if necessary. Always disconnect the battery before working on any fuses to ensure safety.